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Vocabulary
Vocabulary - Paramedic Practice Today
916
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Professional
05/31/2012

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Term
800 MHz
Definition
A type of radio signal in the ultra-high frequency range that allows splitting a frequency into individual talk groups used as a communication link with other system users.
Term
9-1-l/E9-1-1
Definition
A set of three numbers that automatically sends the call to the emergency dispatch center. E9-1-1 is enhanced 9-1-1, which gives the dispatcher the ability to determine the caller's location by routing the
call through several CAD systems.
Term
Abandonment
Definition
Terminating care when it is still needed
and desired by the patient and without ensuring that appropriate care continues to be provided by another qualified health care professional.
Term
Abbreviation
Definition
A shorter way of writing something.
Term
Abdominal compartment syndrome
Definition
Syndrome caused by diffuse intestinal edema, a result of fluid accumu­
lation in the bowel wall. It may be caused by overre­ suscitation with crystalloids and results in shock and renal failure.
Term
Abdominal evisceration
Definition
An injury in which a severe laceration or incision of the abdomen breaches through all layers of muscle to allow abdominal contents, most often the intestines, to protrude above
the surface of the skin.
Term
Aberrant
Definition
Abnormal
Term
Abortion
Definition
The ending of a pregnancy for any reason before 20 weeks' gestation; the lay term miscarriage is referred to as a spontaneous abortion
Term
Abruptio placentae
Definition
Separation of the placenta from the
uterine wall after the twentieth week of gestation.
Term
Abscess
Definition
A collection of pus
Term
Absence seizure
Definition
A generalized seizure characterized by a blank stare and an alteration of consciousness.
Term
Absolute refractory period
Definition
Corresponds with the onset of the QRS complex to approximately the peak of the T wave; cardiac cells cannot be stimulated to conduct an electrical impulse. no matter how strong the stimulus.
Term
Absorption
Definition
Movement of small organic molecules, elec­
trolytes, vitamins, and water across the digestive tract and into the circulatory system. Also the movement of a drug from the site of input into the circulation
Term
Abuse
Definition
Use of a substance for other than its approved, accepted purpose or in a greater amount than prescribed
Term
Acalculus cholecystitis
Definition
Inflammation of the gallbladder in the absence of gallstones.
Term
Acceptance
Definition
A grief stage in which the individual has come to terms with the reality of his or her (or a loved one's) imminent death.
Term
Accessory muscles
Definition
Muscles of the neck, chest, and abdomen that become active during labored breathing.
Term
Accessory pathway
Definition
An extra bundle of working myocar­ dial tissue that forms a connection between the atria and ventricles outside the normal conduction system.
Term
Accreditation
Definition
Recognition given to an EMD center
by an independent auditing agency for achieving a consistently high level of performance based on indus­ try best practice standards.
Term
Acetylation
Definition
A mechanism in which a drug is processed
by enzymes
Term
Acetylcholinesterase
Definition
A body chemical that stops the action of acetylcholine (a neurotransmitter involved in the stimulation of nerves)
Term
Acid
Definition
Fluid produced in the stomach; breaks down the food material within the stomach into chyme.
Term
Acid-base balance
Definition
Delicate balance between the body's acidity and alkalinity
Term
Acidic
Definition
pH less than 7.0.
Term
Acids
Definition
Materials that have a pH value less than 7.0
(e.g., hydrochloric acid, sulfuric acid).
Term
Acquired immunity
Definition
Specific immunity directed at a particular pathogen that develops after the body has been exposed to it once (e.g., immunity to chickenpox after first exposure).
Term
Active listening
Definition
Listening to the words that the patient is saying as well as paying attention to the significance of those words to the patient.
Term
Active range of motion
Definition
The degree of movement at
a joint as determined by the patient's own voluntary movements.
Term
Active transport
Definition
A process used to move substances
against the concentration gradient or toward the side that has a higher concentration; requires the use of energy by the cell but is faster than diffusion

A process used to move substances
against the concentration gradient or toward the side that has a higher concentration; requires the use of energy by the cell but is faster than diffusion
Term
Acute arterial occlusion
Definition
A sudden blockage of arterial blood flow that occurs because of a thrombus, embolus, tumor, direct trauma to an artery, or an unknown cause
Term
Acute care
Definition
Short-term medical treatment usually
provided in a hospital for patients who have an illness or injury or who are recovering from surgery.
Term
Acute coronary syndrome (ACS)
Definition
A term used to refer
to patients presenting with ischemic chest discomfort. Acute coronary syndromes consist of three major syndromes: unstable angina, non-ST-segment elevation myocardial infarction and ST-segment elevation myocardial infarction.
Term
Acute exposure
Definition
An exposure that occurs over a short timeframe (less than 24 hours); usually occurs at a spill or release.
Term
Acute renal failure (ARF)
Definition
When the kidneys suddenly stop functioning, either partially or completely, but even­ tually recover full or nearly full functioning over time.
Term
Acute respiratory distress syndrome (ARDS)
Definition
Collection of fluid in the alveoli of the lung, usually as a result of trauma or serious illness.
Term
Addiction
Definition
The involvement in a repetitive behavior
(gambling, substance abuse, etc.). In physical addiction
the individual has become dependent on an external substance and develops physical withdrawal symptoms if the substance is unavailable.
Term
Addictive behavior
Definition
The involvement in repetitive behavior such as gambling or substance abuse.
Term
Additive effect
Definition
The combined effect of two drugs given at the same time that have similar effects.
Term
Adenosine triphosphate (ATP)
Definition
Formed from metabo­lism of nutrients in the cell; serves as an energy source throughout the body.
Term
Adipocyte
Definition
A fat cell; a connective tissue cell that has differentiated and become specialized in the synthesis (manufacture) and storage of fat.
Term
Adipose (fat)
Definition
connective tissue Tissue that stores lipids; acts as an insulator and protector of the organs
of the body.
Term
Administrative law
Definition
A branch of law that deals with rules, regulations, orders, and decisions created by governmental agencies.
Term
Adrenergic
Definition
Having the characteristics of the sympa­thetic division of the autonomic nervous system.
Term
Adrenocortical steroids
Definition
Hormones released by the
adrenal cortex essential for life; assist in the regulation
of blood glucose levels, promote peripheral use of lipids, stimulate the kidneys to reabsorb sodium, and have antiinflammatory effects.
Term
Adsorb
Definition
To gather or stick to a surface in a condensed layer.
Term
Acute respiratory distress syndrome (ARDS)
Definition
A life­ threatening condition that causes lung swelling and fluid buildup in the air sacs.
Term
Advance directive
Definition
A document in which a competent person gives instructions to be followed regarding his or her health care in the event the person later becomes incapacitated and unable to make or commu­ nicate those decisions to others.
Term
Advanced emergency medical technician (AEMT)
Definition
An EMS professional who provides basic and limited advanced skills to patients who access the EMS system.
Term
Adverse effect (reaction)
Definition
An unintentional, undesirable,
and often unpredictable effect of a drug used at thera­peutic doses to prevent, diagnose, or treat disease.
Term
Advocate
Definition
A person who assists another person in carry­
ing out desired wishes; a paramedic should function as a patient's advocate in all aspects of prehospital care.
Term
Aerosol
Definition
A collection of particles dispersed in a gas.
Term
Affect
Definition
Description of the patient's visible emotional state.
Term
Afferent division
Definition
Nerve fibers that send impulses from
the periphery to the central nervous system.
Term
Affinity
Definition
The intensity or strength of the attraction between a drug and its receptor.
Term
Afterload
Definition
Pressure or resistance against which the ventricles must pump to eject blood.
Term
Ageism
Definition
Stereotypical and often negative bias against older adults.
Term
Agonal respirations
Definition
Slow, shallow, irregular respirations resulting from anoxic brain injury.
Term
Agonist
Definition
A drug that causes a physiologic response in the receptor to which it binds.
Term
Agonist-antagonist
Definition
A drug that blocks a receptor.
It may provide a partial agonist activity, but it also prevents an agonist from exerting its full effects
Term
Agoraphobia
Definition
Consistent anxiety and avoidance of places and situations where escape during a panic attack would be difficult or embarrassing.
Term
Air emboli
Definition
Bubble of air that has entered the vasculature.
Emboli can result in damage similar to a clot in the vasculature, typically resulting in brain injury or pulmonary emboli when neck vessels are damaged.
Term
Air embolism
Definition
Introduction of air into venous circulation, which can ultimately enter the right ventricle, closing off circulation to the pulmonary artery and leading to death.
Term
Air trapping
Definition
A respiratory pattern associated with an obstruction in the pulmonary tree; the breathing rate increases to overcome resistance in getting air out, the respiratory effort becomes more shallow, the volume of trapped air increases, and the lungs inflate.
Term
Airbag identification
Definition
The various shapes, sizes, colors, and styles of visual identification labels indicating that an airbag is present
Term
Airbags
Definition
Inflatable nylon bags designed to supplement the protection of occupants during crashes; one of the most common new technology items confronting responders at crash scenes; also known as supplemental restraint systems.
Term
Air-reactive materials
Definition
Materials that react with
atmospheric moisture and rapidly decompose.
Term
Alarm reaction
Definition
The body's autonomic, sympathetic nervous system response to stimuli designed to prepare the individual to fight or flee.
Term
Alcoholic ketoacidosis (AKA)
Definition
Condition found in patients who chronically abuse alcohol accompanied by vomit­ ing, a built-up of ketones in the blood, and little or no food intake.
Term
Alcoholism
Definition
Addiction and dependence on ethanol; often develops over many years.
Term
Aldosterone
Definition
A hormone responsible for the reabsorption of sodium and water from the kidney tubules.
Term
Alkali
Definition
A substance with a pH above 7.0; also known as a base or caustic.
Term
Alkaline
Definition
pH greater than 7.0.
Term
Alkaloids
Definition
A group of plant-based substances containing nitrogen and found in nature.
Term
Allergen
Definition
A substance that can provoke an allergic reaction.
Term
Allergic reaction
Definition
An abnormal immune response,
mediated by immunoglobulin E antibodies, to an allergen that should not cause such a response and to which the patient has already been exposed; usually involves excessive release of immune agents, espe­ cially histamines.
Term
All-hazards emergency preparedness
Definition
A cross-cutting approach in which all forms of emergencies, including manmade and natural disasters, epidemics, and physical or biologic terrorism, are managed from a common template that uses consistent language and structure.
Term
Allografting
Definition
Transplanting organs or tissues from geneti­
cally nonidentical members of the same species.
Term
All-terrain vehicle (ATV)
Definition
Any of a number of models of small open motorized vehicles designed for off­ road and wilderness use; three-wheeled (all-terrain cycles) and four-wheeled (quads) versions are most often used for personnel insertion; six- and eight­ wheeled models exist for specialized applications.
Term
Alpha particle
Definition
A positively charged particle emitted by certain radioactive materials.
Term
Altered mental status
Definition
Disruption of a person's
emotional and intellectual functioning.
Term
Altitude illness
Definition
A syndrome associated with the relatively low partial pressure of oxygen in the atmos­phere at altitudes encountered during mountain climb­ ing or travel in unpressurized aircraft.
Term
Alveolar air volume
Definition
In contrast to dead air space, alve­
olar volume is the amount of air that does reach the alveoli for gas exchange (approximately 350 mL in the adult male). It is the difference between tidal volume and dead-space volume.
Term
Alveoli
Definition
Functional units of the respiratory system; area in the lungs where the majority of gas exchange takes place; singular form is alveolus.
Term
Alzheimer's disease
Definition
Progressive dementia seen mostly in the elderly and marked by decline of memory and cognitive function.
Term
Amniotic sac (bag of waters)
Definition
The fluid-filled protective sac that surrounds the fetus inside the uterus.
Term
Amplitude
Definition
Height (voltage) of a waveform on the ECG.
Term
Ampule
Definition
A sealed sterile container that holds a single dose of liquid or powdered medication.
Term
Amygdala
Definition
Almond-shaped structure at the end of each
hippocampus that attaches emotional significance to incoming stimuli; has a large role in the fear response; plural form is amygdale.
Term
Amylase
Definition
Enzyme in pancreatic juice.
Term
Amyotrophic lateral sclerosis (ALS)
Definition
Autoimmune disorder affecting the motor roots of the spinal nerves, causing progressive muscle weakness and eventually paralysis.
Term
Anal canal
Definition
Area between the rectum and the anus.
Term
Analgesia
Definition
A state in which pain is controlled or not perceived.
Term
Anaphylactic reaction
Definition
An unusual or exaggerated aller­gic reaction to a foreign substance.
Term
Anaphylactoid reaction
Definition
Reaction that clinically mimics
an allergic reaction but is not mediated by immunoglob­ulin E antibodies, so not a true allergic reaction.
Term
Anaphylaxis
Definition
Life-threatening allergic reaction.
Term
Anasarca
Definition
Massive generalized body edema.
Term
Anatomic plane
Definition
The relation of internal body structures
to the surface of the body; imaginary straight line divi­sions of the body.
Term
Anatomic position
Definition
The position of a person standing erect with his or her feet and palms facing the examiner
Term
Anatomy
Definition
Study of the body's structure and organization.
Term
Anchor point
Definition
A single secure connection for an anchor.
Term
Anchors
Definition
The means of securing the ropes and other elements of the high-angle system.
Term
Anemia
Definition
Deficiency in red blood cells or hemoglobin; most common form is iron-deficiency anemia.
Term
Anesthesia
Definition
A process in which pain is prevented during a procedure.
Term
Aneurysm
Definition
Localized dilation or bulging of a blood vessel wall or wall of a heart chamber.
Term
Anger
Definition
A stage in the grieving process in which the indi­vidual is upset by the stated future loss of life.
Term
Angina pectoris
Definition
Chest discomfort or other related
symptoms of sudden onset that may occur because the increased oxygen demand of the heart temporarily exceeds the blood supply.
Term
Anginal equivalents
Definition
Symptoms of myocardial ischemia
other than chest pain or discomfort.
Term
Angioedema
Definition
Swelling of the tissues, including the dermal layer; often found in and around the mouth,
tongue, and lips.
Term
Angle of Louis
Definition
An angulation of the sternum that indi­cates the point where the second rib joins the sternum; also called the manubriosternal junction.
Term
Anhedonia
Definition
Lack of enjoyment in activities one used to find pleasurable.
Term
Anion
Definition
A negatively charged ion.
Term
Anorexia nervosa
Definition
Eating disorder characterized by a
preoccupation that one is obese; drastic, intentional weight loss; and bizarre attitudes and rituals associ­ ated with food and exercise.
Term
Anoxia
Definition
A total lack of oxygen availability to the tissues.
Term
Antagonist
Definition
A drug that does not cause a physiologic response when it binds with a receptor.
Term
Antegrade amnesia
Definition
The inability to remember short-term memory information after an event during which the head was struck.
Term
Antepartum
Definition
The period before childbirth.
Term
Anterior
Definition
The front, or ventral, surface.
Term
Anterior cord syndrome
Definition
Collection of symptoms seen after the compression, death, or transection of the anterior portion of the spinal cord.
Term
Anthrax
Definition
An acute bacterial infection caused by inhalation, contact, or ingestion of Bacillus anthracis organisms. Three forms of anthrax disease may occur
depending on the route of exposure. Inhalational anthrax disease occurs after the inhalation of anthrax spores. Cutaneous anthrax disease is the most common form and occurs after the exposure of compromised skin to anthrax spores. Gastrointestinal anthrax disease occurs after the ingestion of live B. anthracis in contaminated meat.
Term
Antiarrhythmic
Definition
Medications used to correct irregular heartbeats and slow hearts that beat too fast.
Term
Antibacterial
Definition
Medication that kills or limits bacteria.
Term
Antibiotic
Definition
In common medical terms, a drug that kills bacteria.
Term
Antibody
Definition
Agents produced by B lymphocytes that bind to antigens, thus killing or controlling them and slowing or stopping an infection; also called immunoglobulin.
Term
Antidiuretic hormone (ADH)
Definition
A hormone released in
response to detected loss of body water; prevents
further loss of water through the urinary tract by promoting the reabsorption of water into the blood.
Term
Antidote
Definition
A substance that can reverse the adverse effects of a poison.
Term
Antifungal
Definition
Agent that kills fungi.
Term
Antigen
Definition
A marker on a cell that identifies the cell as "self' or "not self'; antigens are used by antibodies to identify cells that should be attacked as not self.
Term
Antihistamine
Definition
Medication that reduces the effects of histamine.
Term
Antiinflammatory mediators
Definition
Protein entities, often produced in the liver, that act as modulators of the immune response to the proinflammatory response to injury; also called cytokines.
Term
Antipyretic medication
Definition
A medication that reduces or
eliminates a fever.
Term
Antisepsis
Definition
Prevention of sepsis by preventing or inhibit­ing the growth of causative microorganisms; in the field, the process used to cleanse local skin areas before needle puncture with products that are alcohol or iodine based.
Term
Antivenin
Definition
A substance that can reverse the adverse effects of a venom by binding to it and inactivating it.
Term
Antiviral
Definition
Medication that kills or impedes a virus.
Term
Antonym
Definition
A root word, prefix, or suffix that has the opposite meaning of another word.
Term
Anucleated
Definition
Cells of the body that do not have a central nucleus, such as those in cardiac muscle.
Term
Anus
Definition
The end of the anal canal.
Term
Anxiety
Definition
The sometimes vague feeling of apprehension, uneasiness, dread, or worry that often occurs without
a specific source or cause identified. It is also a normal response to a perceived threat.
Term
Aorta
Definition
Delivers blood from the left ventricle of the heart to the body.
Term
Aortic valve
Definition
Semilunar valve on the left of the heart; separates the left ventricle from the aorta.
Term
Apex
Definition
Tip.
Term
Apex of the heart
Definition
Lower portion of the heart, tip of the ventricles (approximately the level of the fifth left
intercostal space); points leftward, downward, and forward.
Term
Apgar score
Definition
A scoring system applied to an infant after delivery; key components include appearance, pulse, grimace, activity, and respiration.
Term
Aphasia
Definition
Loss of speech.
Term
Apnea
Definition
Respiratory arrest.
Term
Apnea monitor
Definition
A technologic aid used to warn of cessation of breathing in a premature infant; also may warn of bradycardia and tachycardia.
Term
Apocrine glands
Definition
Sweat glands that open into hair follicles, including in and around the genitalia, axillae, and anus; secrete an organic substance (which is odorless until acted upon by surface bacteria) into the hair follicles.
Term
Appendicitis
Definition
A tubular process that extends from the colon.
Term
Appendicular region
Definition
Area that includes the extremities
(e.g., arms, pelvis, and legs).
Term
Appendicular skeleton
Definition
Consists of all the bones not within the axial skeleton: upper and lower extremities, the girdles, and their attachments.
Term
Appendix
Definition
Accessory structure of the cecum.
Term
Application of principles
Definition
The step at which the para­ medic applies critical thinking in a clinical sense and arrives at a field impression or a working diagnosis.
Term
Aqueous humor
Definition
Fluid that fills the anterior chamber of the eye; maintains intraocular pressure.
Term
Arachnoid mater
Definition
Second layer of the meninges.
Term
Arachnoid membrane
Definition
Weblike middle layer of the meninges
Term
Areolar connective tissue
Definition
A loose tissue found in most organs of the body; consists of weblike collagen, retic­ulum, and elastin fibers.
Term
Arnold-Chiari malformation
Definition
A complication of spina bifida in which the brainstem and cerebellum extend down through the foramen magnum into the cervical portion of the vertebrae.
Term
Arrector pili
Definition
Smooth muscle that surrounds each follicle; responsible for "goose bumps," which pull the hair upwards.
Term
Arrhythmia
Definition
Term often used interchangeably with dysrhythmia; any disturbance or abnormality in a normal rhythmic pattern; any cardiac rhythm other than a sinus rhythm.
Term
Arterial puncture
Definition
Accidental puncture into an artery instead of a vein.
Term
Arterioles
Definition
Small arterial vessels; supply oxygenated blood to the capillaries
Term
Arteriosclerosis
Definition
A chronic disease of the arterial system characterized by abnormal thickening and hardening of the vessel walls.
Term
Arthritis
Definition
Inflammation of a joint that results in pain, stiffness, swelling, and redness.
Term
Artifact
Definition
Distortion of an ECG tracing by electrical activity that is noncardiac in origin (e.g., electrical interference, poor electrical conduction, patient movement).
Term
Artificial anchors
Definition
The use of specially designed hard­ ware to create anchors where good natural anchors do not exist.
Term
Arytenoid cartilages
Definition
Six paired cartilages stacked on
top of each other in the larynx.
Term
Ascending colon
Definition
Part of the large intestine.
Term
Ascites
Definition
Marked abdominal swelling from a buildup of fluid in the peritoneal cavity.
Term
Asepsis
Definition
Sterile; free from germs, infection, and any form of life.
Term
Asphyxiants
Definition
Chemicals that impair the body's ability to either get or use oxygen.
Term
Aspiration
Definition
Inhalation of foreign contents into the lungs.
Term
Aspiration pneumonitis
Definition
Inflammation of the bronchi and alveoli caused by inhaled foreign objects, usually acids such as stomach acid.
Term
Assault
Definition
A threat of imminent bodily harm to another person by someone with the obvious ability to carry out the threat.
Term
Assay
Definition
A test of a substance to determine its components.
Term
Assessment-based management
Definition
Taking the information you obtain from your assessment and using it to treat the patient.
Term
Asthma
Definition
Allergic response of the airways causing wheezing and dyspnea.
Term
Asynchronous pacemaker
Definition
Fixed-rate pacemaker that continuously discharges at a preset rate regardless of the patient's intrinsic activity.
Term
Asystole
Definition
A total absence of ventricular electrical activity.
Term
Ataxia
Definition
Inability to control voluntary muscle movements; unsteady movements and staggering gait.
Term
Atelectasis
Definition
An abnormal condition characterized by the collapse of alveoli, preventing the respiratory exchange of carbon dioxide and oxygen in a part of the lungs.
Term
Atherosclerosis
Definition
A form of arteriosclerosis in which the
thickening and hardening of the vessel walls are caused by a buildup of fatty deposits in the inner lining of large and middle-sized muscular arteries (from athero, meaning gruel or paste, and sclerosis, meaning hardness).
Term
Atlas
Definition
First cervical vertebra.
Term
Atopic
Definition
A genetic disposition to an allergic reaction that is different from developing an allergy after one or more exposures to a drug or substance.
Term
Atresia
Definition
Absence of a normal opening.
Term
Atria
Definition
Two receiving chambers of the heart; singular form is atrium.
Term
Atrial kick
Definition
Remaining 20% to 30% of blood forced into the right ventricle during atrial contraction.
Term
Atrioventricular junction
Definition
The atrioventricular node and the nonbranching portion of the bundle of His.
Term
Atrioventricular node
Definition
A group of cells that conduct an electrical impulse through the heart; located in the floor of the right atrium immediately behind the tricuspid valve and near the opening of the coronary sinus.
Term
Atrioventricular sequential pacemaker
Definition
Type of dual-chamber pacemaker that stimulates first the atrium, then the ventricle, mimicking normal cardiac physiology.
Term
Atrioventricular valve
Definition
Valve located between each atrium and ventricle; the tricuspid separates the right atrium from the right ventricle, and the mitral (bicuspid) separates the left atrium from the left ventricle.
Term
Atrophy
Definition
Decrease in cell size that negatively affects function.
Term
Attenuated vaccine
Definition
A vaccine prepared from a live virus or bacteria that has been physically or chemically weak­ ened to produce an immune response without causing the severe effects of the disease.
Term
Attributes
Definition
Qualities or characteristics of a person.
Term
Auditory ossicles
Definition
Three small bones (malleus, incus,
and stapes) that articulate with each other to transmit sounds waves to the cochlea.
Term
Augmented limb lead
Definition
Leads aVR, aVL, and aVF; these leads record the difference in electrical potential at one location relative to zero potential rather than rela­ tive to the electrical potential of another extremity, as in the bipolar leads.
Term
Aura
Definition
Sensory disturbances caused by a partial seizure; may precede a generalized seizure.
Term
Auricle
Definition
Outer ear; also called the pinna.
Term
Auscultation
Definition
The process of listening to body sounds with a stethoscope.
Term
Authority having jurisdiction
Definition
The local agency having legal authority for the type of rescue and the location at which it occurs.
Term
Autoantibodies
Definition
Antibodies produced by B cells that mistakenly attack and destroy "self' cells belonging to the patient; autoantibodies are the pathophysiologic agent of most autoimmune disorders.
Term
Autografting
Definition
Transplanting organs or tissues within the same person.
Term
Autoignition point
Definition
The temperature at which a material ignites and bums without an ignition source.
Term
Autologous skin grafting
Definition
The transplantation of skin of one patient from its original location to that of a wound on the same patient, such as a bum. Autologous means "derived from the same individual."
Term
Automatic location identification
Definition
Telephone technology used to identify the location of a caller immediately.
Term
Automatic number identification
Definition
Telephone technology that provides immediate identification of the caller's 10-digit telephone number.
Term
Automaticity
Definition
Ability of cardiac pacemaker cells to initi­ate an electrical impulse spontaneously without being stimulated from another source (such as a nerve).
Term
Autonomic dysreflexia
Definition
Massive sympathetic stimula­tion unbalanced by the parasympathetic nervous system because of spinal cord injury, usually at or above T6.
Term
Autonomic dysreflexia syndrome
Definition
A condition charac­terized by hypertension superior to an SCI site caused by overstimulation of the sympathetic nervous system.
Term
Autonomic nervous system
Definition
Provides unconscious control of smooth muscle organ and glands.
Term
AVPU
Definition
Mnemonic for awake, verbal, pain, unresponsive; used to evaluate a patient's mental status.
Term
Axial compression (loading)
Definition
The application of a force of energy along the axis of the spine, often resulting in compression fractures of the vertebrae.
Term
Axial loading
Definition
Application of excessive pressure or weight along the vertical axis of the spine.
Term
Axial region
Definition
Area that includes the head, neck, thorax,and abdomen.
Term
Axial skeleton
Definition
Part of the skeleton composed of the skull,hyoid bone, vertebral column, and thoracic cage.
Term
Axis
Definition
Imaginary line joining the positive and negative electrodes of a lead.
Term
Axon
Definition
Branching extensions of the neuron where impulses exit the cell.
Term
Azotemia
Definition
The increase in nitrogen-containing waste products in the blood secondary to renal failure.
Term
B lymphocytes
Definition
Cells present in the lymphatic system that mediate humoral immunity (also known as B cells).
Term
B pillar
Definition
The structural roof support member on a vehicle located at the rear edge of the front door; also
referred to as the B post.
Term
Babinski's sign
Definition
An abnormal finding indicated by the
presence of great toe extension with the fanning of all other toes on stimulation of the sole of the foot when it is stroked with a semi-sharp object from the heel to the ball of the foot.
Term
Bacillus anthracis
Definition
A gram-positive, spore-forming bacterium that causes anthrax disease in human beings and animals.
Term
Bacteremia
Definition
The presence of bacteria in the blood. This condition could progress to septic shock. Fever, chills, tachycardia, and tachypnea are common manifesta­ tions of bacteremia.
Term
Bacteria
Definition
Prokaryotic microorganisms capable of infect­ ing and injuring patients; however, some bacteria, as part of the normal flora, assist in the processes of the human body.
Term
Bacterial tracheitis
Definition
A potentially serious bacterial infection of the lower portions of the upper airway: larynx, trachea, and bronchi.
Term
Band
Definition
A range of radio frequencies.
Term
Bargaining
Definition
A stage of the grieving process. The individual may attempt to "cut a deal" with a higher power to accomplish a specific goal or task.
Term
Bariatric ambulance
Definition
Ambulance designed to transport
morbidly obese patients.
Term
Barotrauma
Definition
An injury resulting from rapid or extreme changes in pressure.
Term
Barrier device
Definition
A thin film of material placed on the patient's face used to prevent direct contact with the patient's mouth during positive-pressure ventilation.
Term
Base of the heart
Definition
Top of the heart; located at approxi­
mately the level of the second intercostal space.
Term
Baseline
Definition
Straight line recorded on ECG graph paper
when no electrical activity is detected.
Term
Bases
Definition
Materials with a pH value greater than 7.0 (e.g., sodium hydroxide, potassium hydroxide).
Term
Basilar skull fracture
Definition
Loss of integrity to the bony
structures of the base of the skull.
Term
Basophils
Definition
Type of granulocyte (white blood cell or leukocyte) that releases histamine.
Term
Battery
Definition
Touching or contact with another person
without that person's consent.
Term
Battle's sign
Definition
Significant bruising around the mastoid
process (behind the ears).
Term
Beck's triad
Definition
Classic signs of cardiac tamponade that include jugular venous distention, hypotension, and muffled heart sounds.
Term
Behavior
Definition
The conduct and activity of a person that is observable by others.
Term
Behavioral emergency
Definition
Actions or ideations by the patient that are harmful or potentially harmful to the patient or others.
Term
Belay
Definition
A safety technique used to safeguard personnel exposed to the risk of falling; the belayer is the person responsible for operation of the belay.
Term
Bell's palsy
Definition
An inflammation of the facial nerve (cranial nerve VII) that often is preceded by a viral upper respiratory tract infection.
Term
Benchmarking
Definition
Comparison of operating policies, procedures, protocols, and performance with those of other agencies in an effort to improve results.
Term
Benzodiazepine
Definition
Any of a group of minor tranquilizers
with a common molecular structure and similar phar­ macologic activity, including antianxiety, sedative, hypnotic, amnestic, anticonvulsant, and muscle-relaxing effects.
Term
Beriberi
Definition
Disease caused by a deficiency of thiamine and characterized by neurologic symptoms, cardiovas­cular abnormalities, and edema.
Term
Beta particle
Definition
A negatively charged particle emitted by certain radioactive materials.
Term
Bevel
Definition
The slanted tip at the end of the needle.
Term
Bicuspid valve
Definition
Left atrioventricular valve in the heart; also called the mitral valve.
Term
Bile salts
Definition
Manufactured in the liver; composed of electrolytes and iron recovered from red blood cells when they die.
Term
Bilevel positive airway pressure (BiPAP)
Definition
The delivery of two (bi) levels of positive-pressure ventilation; one during inspiration (to keep the airway open as the patient inhales) and the other (lower) pressure during expiration to reduce the work of
exhalation.
Term
Bilevel positive airway pressure (BiPAP) device
Definition
Breathing device that can be set at one pressure for inhaling and a different pressure for exhaling.
Term
Bioassay
Definition
A test that determines the effects of a substance on an organism and compares the result with some agreed standard.
Term
Bioavailability
Definition
The speed with which and how much of
a drug reaches its intended site of action.
Term
Bioburden
Definition
Accumulation of bacteria in a wound; does not necessarily imply an infection is present.
Term
Biologic agent
Definition
A disease-causing pathogen or a toxin that may be used as a weapon to cause disease or injury to people.
Term
Biot respirations
Definition
Irregular respirations varying in rate and depth and interrupted by periods of apnea; associated with increased intracranial pressure, brain damage at the level of the medulla, and respiratory compromise from drug poisoning.
Term
Biphasic
Definition
Waveform that is partly positive and partly negative.
Term
Bipolar disorder
Definition
An illness of extremes of mood, alter­
nating between periods of depression and episodes of mania (type I) or hypomania (type II).
Term
Bipolar limb lead
Definition
ECG lead consisting of a positive and negative electrode; a pacing lead with two electrical poles that are external from the pulse generator; the nega­ tive pole is located at the extreme distal tip of the pacing lead, and the positive pole is located several millimeters proximal to the negative electrode. The stimulating pulse is delivered through the negative electrode.
Term
Birth canal
Definition
Part of the female reproductive tract through which the fetus is delivered; includes the lower part of the uterus, the cervix, and the vagina.
Term
Blast lung syndrome
Definition
Injuries to the body from an explosion, characterized by anatomic and physiologic changes from the force generated by the blast wave hitting the body's surface and affecting primarily gas-containing structures (lungs, gastrointestinal tract, and ears).
Term
Bleeding
Definition
Escape of blood from a blood vessel.
Term
Blister agent
Definition
A chemical used as a weapon designed specifically to injure the body tissue internally and externally of those exposed to its vapors or liquid; the
method of injury is to cause painful skin blisters or tissue destruction of the exposed surface area (e.g., mustard, lewisite).
Term
Blocked premature atrial complex
Definition
Premature atrial contraction not followed by a QRS complex.
Term
Blocking
Definition
A position that places the emergency vehicle at an angle to the approaching traffic, across several lanes of traffic if necessary; this position begins to shield the work area and protects the crash scene from some of the approaching traffic.
Term
Blood
Definition
Liquid connective tissue; allows transport of nutrients, oxygen, and waste products.
Term
Blood agents
Definition
Chemicals absorbed into the body through the action of breathing, skin absorption, or ingestion (e.g., hydrogen cyanide, cyanogen chloride).
Term
Blood alcohol content
Definition
Milligrams of ethanol per deciliter of blood divided by 100; a fairly standard measure of how intoxicated a person is.
Term
Blood-brain barrier
Definition
A layer of tightly adhered cells that protects the brain and spinal cord from exposure to medications, toxins, and infectious particles.
Term
Blood pressure
Definition
Force exerted by the blood against the walls of the arteries as the ventricles of the heart
contract and relax.
Term
Bloody show
Definition
Passage of the protective blood and mucus plug from the cervix; often is an early sign of labor.
Term
Body mass index
Definition
A calculation strongly associated with subcutaneous and total body fat and with skinfold thickness measurements.
Term
Body surface area (BSA)
Definition
Area of the body covered
by skin; measured in square meters.
Term
Boiling liquid expanding vapor explosion
Definition
An explosion that can occur when a vessel containing a pressurized liquid ruptures.
Term
Boiling point
Definition
The temperature at which the vapor pressure of the material being heated equals atmospheric pressure (760 mm Hg); water boils to steam at 100° C (212° F).
Term
Bone
Definition
Hard connective tissue; consists of living cells and a matrix made of minerals.
Term
Borborygmi
Definition
Hyperactivity of bowel sounds.
Term
Borderline personality disorder
Definition
Cluster B disorder marked by unstable emotions, relationships, and attitudes.
Term
Botulism
Definition
A severe neurologic illness caused by a potent toxin produced by Clostridium botulinum organisms; the three forms are food borne, wound, and infant (also called intestinal) botulism.
Term
Bowel sounds
Definition
The noises made by the intestinal smooth muscles as they squeeze fluids and food products through the digestive tract.
Term
Bowman's capsule
Definition
Located in the renal corpuscle.
Term
Boyle's law
Definition
Gas law that demonstrates that as pressure increases, volume decreases; explains the pain that can occur in flight in the teeth and ears and baro­ trauma in the gastrointestinal tract.
Term
Bradycardia
Definition
Heart rate slower than 60 beats/min(from brady, meaning "slow").
Term
Bradykinesia
Definition
Abnormal slowness of muscular movement.
Term
Bradypnea
Definition
A respiratory rate that is persistently slower than normal for age; in adults, a rate slower than
12 breaths/min.
Term
Brain injury
Definition
A traumatic insult to the brain capable of producing physical, intellectual, emotional, social, and vocational changes.
Term
Brainstem
Definition
Part of the brain that connects it to the spinal cord; responsible for many of the autonomic functions the body requires to survive (also called vegetative functions).
Term
Brake bar rack
Definition
A descending device consisting of a U-shaped metal bar to which several metal bars are attached that create friction on the rope. Some racks are limited to use in personal rappelling, whereas others also may be used for lowering rescue loads.
Term
Braxton-Hicks contractions (false labor)
Definition
Benign and painless contractions that usually occur after the third month of pregnancy.
Term
Breach of duty
Definition
Violation by the defendant of the standard of care applicable to the circumstances.
Term
Breech presentation
Definition
Presentation of the buttocks or feet
of the fetus as the first part of the infant's body to enter the birth canal.
Term
Bronchioles
Definition
Smallest of the air passages.
Term
Bronchiolitis
Definition
An acute, infectious, inflammatory
disease of the upper and lower respiratory tracts that results in obstruction of the small airways.
Term
Bronchitis
Definition
Inflammation of the lower airways, usually with mucus production. Often chronic and related to tobacco abuse.
Term
Bronchopulmonary dysplasia BPD)
Definition
Respiratory condition in infants usually arising from preterm birth.
Term
Bronchospasm
Definition
Wheezing.
Term
Brown-Sequard syndrome
Definition
Group of symptoms that develop after the herniation or transection of half of the spinal cord manifested with unilateral damage.
Term
Bruit
Definition
The blowing or swishing sound created by the turbulence within a blood vessel.
Term
Bubonic
Definition
Relating to an inflamed, enlarged lymph gland.
Term
Buccal
Definition
An administration route in which medication is placed in the mouth between the gum and the mucous membrane of the cheek and absorbed into the bloodstream.
Term
Buffer systems
Definition
Compensatory mechanisms that act
together to control pH.
Term
Bulbourethral glands
Definition
Pair of small glands that manu­ facture a mucous-type secretion that unites with the prostate fluid and spermatozoa to form sperm.
Term
Bulimia nervosa
Definition
Eating disorder consisting of a pattern of eating large amounts of food in one sitting (hing­ ing) and then forcing oneself to regurgitate (purging), with associated guilt and depression.
Term
Bulk containers
Definition
Large containers and tanks used to transport large quantities of hazardous materials.
Term
Bulla
Definition
A localized, fluid-filled lesion usually greater than
0.5 cm.
Term
Bundle branch block (BBB)
Definition
Abnormal conduction of an electrical impulse through either the right or left bundle branches.
Term
Bundle of His
Definition
Fibers located in the upper portion of the interventricular septum that conduct an electrical impulse through the heart.
Term
Burnout
Definition
Exhaustion to the point of not being able to perform one's job effectively.
Term
Bursitis
Definition
Chronic or acute inflammation of the small synovial sacs known as bursa.
Term
Burst
Definition
Three or more sequential ectopic beats; also referred to as a salvo or run.
Term
Cadaveric transplantation
Definition
Transplantation of organs from an already deceased person to a living person.
Term
Calibration
Definition
Regulation of an ECG machine's stylus
sensitivity so that a 1-mV electrical signal will produce a deflection measuring exactly 10 mm.
Term
Call processing time
Definition
The elapsed time from the moment a call is received by the communications
center to the time the responding unit is alerted.
Term
Cancer
Definition
A group of diseases that allow unrestrained growth of cells in one or more of the body organs or tissues.
Term
Capacitance vessels
Definition
Venules that have the capability of holding large amounts of volume.
Term
Capillaries
Definition
Tiny vessels that connect arterioles to venules; deliver blood to each cell in the body.
Term
Capillary leak
Definition
Loss of intravascular fluid (plasma, water) from a loss of capillary integrity or an opening of gap May be caused by thermal injury to capillaries or the intense inflammatory reaction to burn injury, infection, or physical trauma. junctions between the cells of the capillaries.
Term
Caplet
Definition
A tablet with an oblong shape and a film-coated covering.
Term
Capnograph
Definition
A device that provides a numerical reading of exhaled C02 concentrations and a waveform (tracing).
Term
Capnography
Definition
Continuous analysis and recording of C02 concentrations in respiratory gases.
Term
Capnometer
Definition
A device used to measure the concentration of C02 at the end of exhalation.
Term
Capnometry
Definition
A numeric reading of exhaled C02 concentrations without a continuous written record or waveform.
Term
Capsid
Definition
Layer of protein enveloping the genome of a virion; composed of structural units called the capsomeres.
Term
Capsule
Definition
A membranous shell surrounding certain
microorganisms, such as the pneumococcus bacterium.
Term
Capture
Definition
Ability of a pacing stimulus to depolarize successfully the cardiac chamber being paced; with one-to-one capture, each pacing stimulus results in depolarization of the appropriate chamber.
Term
Carbamate
Definition
A pesticide that inhibits acetylcholinesterase.
Term
Carbon dioxide narcosis
Definition
Condition mostly seen in patients with chronic obstructive pulmonary disease, in whom carbon dioxide is excessively retained, causing mental status changes and decreased respirations.
Term
Carboys
Definition
Glass or plastic bottles commonly used to transport corrosive products.
Term
Carbuncle
Definition
A series of abscesses in the subcutaneous tissues that drain through hair follicles.
Term
Cardiac arrest
Definition
Absence of cardiac mechanical activity confirmed by the absence of a detectable pulse, unre­sponsiveness, and apnea or agonal, gasping respirations.
Term
Cardiac cycle
Definition
Period from the beginning of one heart­ beat to the beginning of the next; normally consisting of PQRST waves, complexes, and intervals.
Term
Cardiac output
Definition
Amount of blood pumped into the aorta each minute by the heart.
Term
Cardiac rupture
Definition
An acute traumatic perforation of the
ventricles or atria.
Term
Cardiac sphincter
Definition
Circular muscle that controls the movement of material into the stomach.
Term
Cardiogenic shock
Definition
A condition in which heart muscle function is severely impaired, leading to decreased cardiac output and inadequate tissue perfusion.
Term
Cardiomyopathy
Definition
A disease of the heart muscle.
Term
Cardiovascular disorders
Definition
A collection of diseases and conditions that involve the heart (cardio) and blood vessels (vascular).
Term
Carina
Definition
Area in the bronchial tree that separates into the right and left mainstem bronchi.
Term
Carotid bruit
Definition
The noise made when blood in the carotid arteries passes over plaque buildups.
Term
Carpal tunnel syndrome
Definition
A medical condition in which the median nerve is compressed at the wrist(within the carpal tunnel), resulting in pain and numbness of the hand.
Term
Carpopedal spasm
Definition
Spasm of the muscles of the hand when a blood pressure cuff is inflated. Can occur in the feet if the cuff is placed on the leg. A result of hyperventilation.
Term
Cartilage
Definition
Connective tissue composed of chondrocytes; exact makeup depends on the location and function in the body.
Term
Cartilaginous joint
Definition
Unites two bones with hyaline cartilage or fibrocartilage.
Term
Case law
Definition
Interpretations of constitutional, statutory, or administrative law made by the courts; also known as common law or judge-made law.
Term
Catabolic
Definition
Refers to the metabolic breakdown of proteins, lipids, and carbohydrates by the body to produce energy.
Term
Catabolism
Definition
Process of breaking down complex substances into more simple ones.
Term
Catalepsy
Definition
Abnormal state characterized by a trancelike level of consciousness and postural rigidity; occurs in
hypnosis and in certain organic and psychological disor­ders such as schizophrenia, epilepsy, and hysteria.
Term
Cataract
Definition
A partial or complete opacity on or in the lens or lens capsule of the eye, especially one impairing vision or causing blindness.
Term
Catatonia
Definition
A state of psychologically induced immobil­ity with muscular rigidity, at times interrupted by agitation.
Term
Catatonic schizophrenia
Definition
A form of schizophrenia char­acterized by alternating periods of extreme withdrawal and extreme excitement. During the withdrawal stage stupor, waxy flexibility, muscular rigidity, mutism, blocking, negativism, and catalepsy may be seen; during the period of excitement, purposeless and impulsive activity may range from mild agitation to violence. See Catatonia.
Term
Cathartics
Definition
Substances that decrease the time a poison spends in the gastrointestinal tract by increasing bowel motility.
Term
Catheter shear/catheter fragment embolism
Definition
Breaking off the tip of the intravenous catheter inside the vein, which then travels through the venous system; it can lodge in pulmonary circulation as a pulmonary embolism.
Term
Cation
Definition
A positively charged ion.
Term
Cauda equina
Definition
Peripheral nerve bundles descending through the spinal column distal to the conus medullaris. Cauda equina are not spinal nerves.
Term
Cauda equina syndrome
Definition
A group of symptoms associated with the compression of the peripheral nerves still within the spinal canal below the level of the first lumbar vertebra, characterized by lumbar
back pain, motor and sensory deficits, and bowel or bladder incontinence.
Term
Caudal
Definition
A position toward the distal end of the body; usually inferior.
Term
Causation
Definition
In a negligence case, the negligence of the defendant must have caused or created the harm sustained by the plaintiff; also referred to as proximate cause.
Term
Caustic
Definition
A substance with a pH above 7.0; also known as a base or alkali.
Term
Cecum
Definition
First segment of the large intestine; the appendix is its accessory structure.
Term
Cell body
Definition
Portion of the neuron containing the organelles, where essential cellular functions are performed.
Term
Cell-mediated immunity
Definition
Form of acquired immunity; results from activation of T lymphocytes that were previously sensitized to a specific antigen.
Term
Cellular swelling
Definition
Swelling of cellular tissues, usually from injury.
Term
Cellulitis
Definition
An inflammation of the skin.
Term
Cementum
Definition
A layer of tough tissue that anchors the root of a tooth to the periodontal membrane/ligament.
Term
Central cord syndrome
Definition
Collection of symptoms seen after the death of the central portion of the spinal cord.
Term
Central nervous system
Definition
The brain and spinal cord.
Term
Central neurogenic hyperventilation
Definition
Similar to Kussmaul respirations; characterized as deep, rapid
breathing; associated with increased intracranial pressure.
Term
Central retinal artery occlusion
Definition
A condition in which the blood supply to the retina is blocked because of a clot or embolus in the central retinal artery or one of its branches.
Term
Central vein
Definition
A major vein of the chest, neck, or abdomen.
Term
Central venous catheter
Definition
A catheter through a vein to end in the superior vena cava or right atrium of the heart for medication or fluid administration.
Term
Centrioles
Definition
Paired, rodlike structures that exist in a specialized area of the cytoplasm known as the centro­
some.
Term
Centrosome
Definition
Specialized area of the cytoplasm; plays an important role in the process of cell division.
Term
Cephalic
Definition
A position toward the head; usually superior.
Term
Cerebellum
Definition
Area of the brain involved in fine and gross coordination; responsible for interpretation of actual movement and correction of any movements that interfere with coordination and the body's position.
Term
Cerebral contusion
Definition
A brain injury in which brain tissue is bruised in a local area but does not puncture the pia mater.
Term
Cerebral palsy
Definition
Neuromuscular condition in which the patient has difficulty controlling the voluntary muscles because of damage to a portion of the brain.
Term
Cerebral perfusion pressure
Definition
Pressure inside the cerebral arteries and an indicator of brain perfusion;
calculated by subtracting intracranial pressure from mean arterial pressure (CPP =MAP- ICP).
Term
Cerebrospinal fluid (CSF)
Definition
Fluid that bathes, protects,
and nourishes the central nervous system.
Term
Cerebrovascular accident (CVA)
Definition
Blockage or hemor­rhage of the blood vessels in the brain, usually causing
focal neurologic deficits; also known as a stroke.
Term
Cerebrum
Definition
Largest part of the brain, divided into right and left hemispheres.
Term
Certification
Definition
An external verification of the competencies that an individual has achieved and typically involves an examination process; in healthcare these processes are typically designed to verify that an individual has achieved minimal competency to ensure safe and effective patient care.
Term
Certified Flight Paramedic (FP-C)
Definition
A certification obtained by paramedics on successful completion of the Flight Paramedic Examination.
Term
Certified Flight Registered Nurse (CFRN)
Definition
A nurse who has completed education, training, and certifica­tion beyond a registered nurse with a focus on air
medical transport of potentially critically ill or injured patients.
Term
Cerumen
Definition
Earwax
Term
Ceruminous glands
Definition
Glands lining the external auditory canal; produce cerumen or earwax.
Term
Cervical spondylosis
Definition
Degeneration of two or more cervical vertebrae, usually resulting in a narrowing of the space between the vertebrae.
Term
Cervical vertebrae
Definition
First seven vertebrae in descending order from the base of the skull.
Term
Cervix
Definition
Inferior portion of the uterus.
Term
Chalazion
Definition
A small bump on the eyelid caused by a blocked oil gland.
Term
Charles' law
Definition
Law stating that oxygen cylinders can
have variations in pressure readings in different ambi­ent temperatures.
Term
Chelating agent
Definition
A substance that can bind metals; used as an antidote to many heavy metal poisonings.
Term
Chemical Abstracts Services (CAS) number
Definition
Unique identification number of chemicals, much like a person's Social Security number.
Term
Chemical asphyxiants
Definition
Chemicals that prevent the transportation of oxygen to the cells or the use of oxygen at the cellular level.
Term
Chemical name
Definition
A precise description of a drug's chem­ical composition and molecular structure.
Term
Chemical restraints
Definition
Agents such as sedatives that can suppress a patient's neurologic and/or motor capabilities and reduce the threat to the paramedic; also known as pharmacologic restraints.
Term
Cheyne-Stokes respirations
Definition
A pattern of gradually increasing rate and depth of breathing that tapers to slower and shallower breathing with a period of apnea before the cycle repeats itself; often described as a crescendo-decrescendo pattern or periodic breathing.
Term
Chief complaint
Definition
The reason the patient has sought medical attention.
Term
Child maltreatment
Definition
An all-encompassing term for all
types of child abuse and neglect, including physical abuse, emotional abuse, sexual abuse, and neglect.
Term
Chloracetophenone
Definition
Tear gas; commercially known as
Mace.
Term
Choanal atresia
Definition
Narrowing or blockage of one or both nares by membranous or bony tissue.
Term
Choking agent
Definition
An industrial chemical used as a weapon to kill those who inhale the vapors or gases; the method of injury is asphyxiation resulting from lung damage from hydrochloric acid bums (e.g., chlorine, phosgene); also known as a pulmonary agent.
Term
Cholangitis
Definition
Inflammation of the bile duct.
Term
Cholecystitis
Definition
Inflammation of the gallbladder.
Term
Choledocholithiasis
Definition
The presence of gallstones in the common bile duct.
Term
Cholelithiasis
Definition
The presence of stones in the gallbladder.
Term
Cholinergic
Definition
Having the characteristics of the parasym­ pathetic division of the autonomic nervous system.
Term
Cholinesterase inhibitor
Definition
A chemical that blocks the action of acetylcholinesterase; thus the neurotransmit­ter acetylcholine is allowed to send its signals continuously to innervate nerve endings.
Term
Chordae tendineae
Definition
Fibrous bands of tissue in the valves that attach to each part or cusp of the valve.
Term
Chorioamnionitis
Definition
Infection of the amniotic sac and its
contents.
Term
Choroid
Definition
Vascular layer of the eyeball
Term
Choroid plexus
Definition
Group of specialized cells in the ventri­cles of the brain; filters blood through cerebral capillaries to create the cerebrospinal fluid.
Term
Chromatin
Definition
Material within a cell nucleus from which the chromosomes are formed.
Term
Chromosomes
Definition
Any of the threadlike structures in the nucleus of a cell that function in the transmission of genetic information; each consists of a double strand of DNA attached to proteins called histones.
Term
Chronic
Definition
Long,drawn out; applied to a disease that is not acute.
Term
Chronic exposure
Definition
An exposure to low concentrations
over a long period.
Term
Chronic obstructive pulmonary disease (COPD)
Definition
A progressive and irreversible condition characterized by diminished inspiratory and expiratory capacity of the lungs.
Term
Chronic renal failure
Definition
The gradual, long-term deterioration of kidney function.
Term
Chronology
Definition
The arrangement of events in time.
Term
Chronotropism
Definition
A change in heart rate.
Term
Chute time
Definition
The time required to get a unit en route to a call from dispatch.
Term
Chyme
Definition
Semifluid mass of partly digested food expelled by the stomach into the duodenum.
Term
Ciliary body
Definition
Consists of muscles that change the shape of the lens in the eye; includes a network of capillaries that produce aqueous humor.
Term
Circadian
Definition
A daily rhythmic activity cycle based on 24-hour intervals or events that occur at approxi­mately 24-hour intervals, such as certain physiologic
occurrences.
Term
Circadian rhythm
Definition
The 24-hour cycle that relates to work and rest time.
Term
Circumflex artery
Definition
Division of the left coronary artery.
Term
Circumoral paresthesia
Definition
A feeling of tingling around the lips and mouth caused by hyperventilation.
Term
Circumstantial thinking
Definition
Adding detours and extra details to conversations but eventually returning to the main topic.
Term
Cirrhosis
Definition
A chronic degenerative disease of the liver.
Term
Civil law
Definition
A branch of law that deals with torts (civil wrongs) committed by one individual, organization, or group against another.
Term
Clarification
Definition
Asking the speaker to help you understand.
Term
Classic heat stroke
Definition
Heat stroke caused by environmental exposure that results in core hyperthermia greater than 40° C. (104oF).
Term
Clean
Definition
To wash with soap and water.
Term
Cleft lip
Definition
Incomplete closure of the upper lip.
Term
Cleft palate
Definition
Incomplete closure of the hard and/or soft palate of the mouth.
Term
Clinical performance indicator
Definition
A definable, measurable, skilled task completed by the dispatcher that has a significant impact on the delivery of patient care.
Term
Clitoris
Definition
Small, erectile structure at the entrance to the vagina.
Term
Closed-ended questions
Definition
A form of interview question that limits a patient's response to simple, brief words or phrases (e.g., "yes or no," "sharp or dull").
Term
Closed fracture
Definition
Fracture of the bone tissue that has not broken the skin tissue.
Term
Clostridium botulinum
Definition
A bacterium that produces a powerful toxin that causes botulism disease in human beings, waterfowl, and cattle.
Term
Cluster A personality disorders
Definition
Odd and eccentric type of personality disorders, including paranoid, schizoid, and schizotypal; characterized by social isolation and odd thought processes.
Term
Cluster B personality disorders
Definition
Emotional and dramatic type of personality disorders, including histrionic, borderline, antisocial, and narcissistic;
characterized by impulsive, unpredictable behavior, and manipulation of others.
Term
Cluster C personality disorders
Definition
Anxious and fearful type of personality disorders, including avoidant, dependent, and compulsive; marked by anxiety, shyness, and avoidance of conflict.
Term
Cluster headache
Definition
A migraine-like condition characterized by attacks of intense unilateral pain. The pain occurs most often over the eye and forehead and is accompanied by flushing and watering of the eyes and nose. The attacks occur in groups, with a duration of several hours.
Term
CNS-PAD
Definition
An acronym for central nervous system padding: pia matter, arachnid matter, dura matter.
Term
Coagulation
Definition
Formation of blood clots with the associated increase in blood viscosity.
Term
Coagulation cascade
Definition
A set of interactions of the circulating clotting factors.
Term
Coagulation necrosis
Definition
Dead or dying tissue that forms a
scar or eschar.
Term
Cocaine hydrochloride
Definition
Fine, white powdered form of cocaine, a powerful central nervous system stimulant; typically snorted intranasally.
Term
Coccyx (coccygeal vertebrae)
Definition
Terminal end of the spinal column; a tail-like bone composed of three to five verte­bra. No nerve roots travel through the coccyx.
Term
Cochlea
Definition
Bony structure in the inner ear resembling a tiny snail shell.
Term
Code of ethics
Definition
A guide for interactions between members of a specific profession (such as physicians) and the public.
Term
Codependence
Definition
A psychological concept defined as exhibiting too much and often inappropriate caring behavior.
Term
Cognition
Definition
Operation of the mind by which one becomes aware of objects of thought or perception; includes all aspects of perceiving, thinking, and remembering.
Term
Cognitive disability
Definition
An impairment that affects an individual's awareness and memory as well as his or her ability to learn, process information, communicate, and make decisions.
Term
Cognitive phase
Definition
In the phases of immune response, the stage at which a foreign antigen is recognized to be present.
Term
Cold diuresis
Definition
The occurrence of increased urine production on exposure to cold.
Term
Cold protective response
Definition
The mechanism associated with cold water in which individuals can survive extended periods of submersion.
Term
Cold zone
Definition
A safe area isolated from the area of contam­ ination; also called the support zone. This zone has safe and easy access. It contains the command post and staging areas for personnel, vehicles, and equipment. EMS personnel are stationed in the cold zone.
Term
Collagen
Definition
A fibrous protein that provides elasticity and strength to skin and the body's connective tissue.
Term
Collapsed lung
Definition
See Pneumothorax.
Term
Colostomy
Definition
Incision in the colon for the purpose of making a temporary or permanent opening between the bowel and the abdominal wall.
Term
Combination deployment
Definition
Using a mix of geographic coverage and demand posts to best serve the community given the number of ambulances available at any one time.
Term
Combining form
Definition
A word root followed by a vowel.
Term
Combining vowel
Definition
A vowel that is added to a word root before a suffix.
Term
Comfort care
Definition
Medical care intended to provide relief from pain and discomfort, such as the control of pain with medications.
Term
Command post
Definition
The location from which incident operations are directed.
Term
Comminuted skull fracture
Definition
Breakage of a bone or bones of the skull into multiple fragments.
Term
Communicable period
Definition
The period after infection during which the diease may be transmitted to another host.
Term
Communication
Definition
The exchange of thoughts, messages,
and information.
Term
Compartment syndrome (CS)
Definition
A condition in which compartment pressures increase in an injured extrem­ity to the point that capillary circulation is stopped; often only correctable through surgical opening of the compartment.
Term
Compensatory pause
Definition
Pause for which the normal beat after a premature complex occurs when expected; also called a complete pause.
Term
Complete abortion
Definition
Passage of all fetal tissue before
20 weeks of gestation.
Term
Complex
Definition
Several waveforms
Term
Complex partial seizure
Definition
A seizure affecting only one
part of the brain that does alter consciousness.
Term
Compliance
Definition
The resistance of the patient's lung tissue
to ventilation.
Term
Compound presentation
Definition
Presentation of an extremity beside the major presenting fetal part.
Term
Compound skull fracture
Definition
Open skull fracture.
Term
Compound word
Definition
Word that contains more than one root.
Term
Computer-aided dispatch (CAD)
Definition
A computer-aided system that automates dispatching by enhanced data collection, rapid recall of information, dispatch mapping, as well as unit tracking and the ability to track and dispatch resources.
Term
Concealment To hide or put out of site; provides no ballistic protection.
Definition
To hide or put out of site; provides no ballistic protection.
Term
Concept formation
Definition
The initial formation of an overall
concept of care for a particular patient begins when the paramedic arrives on location of the incident.
Term
Conception
Definition
The act or process of fertilization;
beginning of pregnancy.
Term
Concurrent medical direction
Definition
Consultation with a physician or other advanced health care professional by telephone, radio, or other electronic means, permitting the physician and paramedic to decide together on the best course of action in the delivery of patient care.
Term
Concussion
Definition
A brain injury with a transient impairment of consciousness followed by a rapid recovery to baseline neurologic activity.
Term
Conducting arteries
Definition
Large arteries of the body (e.g., aorta and the pulmonary trunk); have more elas­ tic tissue and less smooth muscle; stretch under great
pressures and then quickly return back to their origi­
nal shapes.
Term
Conduction system
Definition
A system of pathways in the heart composed of specialized electrical (pacemaker) cells.
Term
Conductive hearing loss
Definition
Type of deafness that occurs where there is a problem with the transfer of sound
from the outer to the inner ear.
Term
Conductivity
Definition
Ability of a cardiac cell to receive an elec­ trical stimulus and conduct that impulse to an adjacent cardiac cell.
Term
Confidentiality
Definition
Protection of patient information in any form and the disclosure of that information only as
needed for patient care or as otherwise permitted by law.
Term
Confined space
Definition
By Occupational Safety and Health
Administration (OSHA) definition, a space large
enough and configured so that an employee can enter and perform assigned work but has limited or restricted means for entry or exit (e.g., tanks, vessels, silos, storage bins, hoppers, vaults, and pits are spaces that may have limited means of entry); not designed for continuous employee occupancy.
Term
Confrontation
Definition
Focusing on a particular point made
during the interview.
Term
Congenital
Definition
Present at or before birth.
Term
Conjunctiva
Definition
Thin, transparent mucous membrane that covers the inner surface of the eyelids and the outer surface of the sclera.
Term
Conjunctivitis
Definition
Inflammation of the conjunctiva.
Term
Connective tissue
Definition
Most abundant type of tissue in the body; composed of cells that are separated by a matrix.
Term
Conscious sedation
Definition
A medication or combination of medications that allows a patient to undergo what could be an unpleasant experience by producing an altered level of consciousness but not complete anesthesia. The goal is for the patient to breathe spon­ taneously and maintain his or her own airway.
Term
Consensus formula
Definition
Formula used to calculate the volume of fluid needed to properly resuscitate a burn patient. The formula is 2 to 4 mL!kg/% total body surface area burned. This is the formula currently regarded by the American Burn Association as the standard of care in adult burn patients. Several other, similar formulas exist that also may be used.
Term
Consent
Definition
Permission.
Term
Constricted affect
Definition
Emotion shown in degrees less than expected.
Term
Contamination
Definition
The deposition or absorption of chemical, biologic, or radiologic materials onto personnel or other materials.
Term
Contamination reduction zone
Definition
See Warm zone.
Term
Continuing education (CE)
Definition
Lifelong learning.
Term
Continuous positive airway pressure (CPAP)
Definition
The delivery of slight positive pressure throughout the respiratory cycle to prevent airway collapse, reduce the work of breathing, and improve alveolar ventilation.
Term
Continuous positive airway pressure (CPAP) device
Definition
Breathing device that allows delivery of slight positive pressure to prevent airway collapse and improve oxygenation and ventilation in spontaneously breath­ing patients.
Term
Continuous quality improvement (CQI)
Definition
Programs designed to improve the level of care; commonly driven by quality assurance.
Term
Contractility
Definition
Ability to shorten in length actively.
Term
Contraction
Definition
Rhythmic tightening of the muscular
uterine wall that occurs during normal labor and leads to expulsion of the fetus and placenta from the uterus.
Term
Contraction interval
Definition
The time from the beginning of one
contraction to the beginning of the next contraction
Term
Contraction time
Definition
The time from the beginning to the
end of a single uterine contraction.
Term
Contraindication
Definition
Use of a drug for a condition when it is not advisable.
Term
Contrecoup injury
Definition
An injury at another site, usually opposite the point of impact.
Term
Contributory negligence
Definition
An injured plaintiff's failure
to exercise due care that, along with the defendant's negligence, contributed to the injury.
Term
Conus medullaris
Definition
Terminal end of the spinal cord.
Term
Conus medullaris syndrome
Definition
Complications resulting from injury to the conus medullaris.
Term
Conventional silo
Definition
A vertical structure used to store ensiled plant material in a aerobic environment.
Term
Cor pulmonale
Definition
Right-sided heart failure caused by pulmonary disease.
Term
Core body temperature
Definition
The measured body temperature within the core of the body; generally measured with an esophageal probe; normal is 98.6° F.
Term
Cornea
Definition
Avascular, transparent structure that permits light through to the interior of the eye.
Term
Coronary artery disease
Definition
Disease of the arteries that supply the heart muscle with blood.
Term
Coronary heart disease
Definition
Disease of the coronary arteries and their resulting complications, such as angina pectoris or acute myocardial infarction.
Term
Coronary sinus
Definition
Venous drain for the coronary circulation into the right atrium.
Term
Corrosive
Definition
A substance able to corrode tissue or metal (e.g., acids and bases).
Term
Corticosteroids
Definition
See Adrenocortical steroids.
Term
Cosmesis
Definition
Of or referring to the improvement of physical appearance.
Term
Costal angle
Definition
The angle formed by the margins of the ribs at the sternum.
Term
Costochondritis
Definition
Inflammation of the cartilage in the anterior chest that causes chest pain.
Term
Coughing
Definition
A protective mechanism usually induced by mucosal irritation; the forceful, spastic expiration
experienced during coughing aids in the clearance of the bronchi and bronchioles.
Term
Coup - contrecoup
Definition
An injury most often associated with a blow to the skull in which the force of the impact is transmitted through the skull bones to the opposite side of the head, where the bruise, fracture, or other sign of injury appears.
Term
Coup injury
Definition
An injury directly below the point of impact.
Term
Couplet
Definition
Two consecutive premature complexes.
Term
Cover
Definition
A type of concealment that hides the body and offers ballistic protection.
Term
Crack cocaine
Definition
Solid, brownish-white crystal form of cocaine, a powerful central nervous system stimulant; typically smoked.
Term
Crackles (rales)
Definition
As the name implies, when fluid accumulates in the smaller airway passages, air passing through the fluid creates a moist crackling or popping sound heard on inspiration.
Term
Cranial nerve
Definition
Twelve pairs of nerves that exit the brain and innervate the head and face; some also are part of the visceral portion of the peripheral nervous system.
Term
Cranium
Definition
The vaultlike portion of the skull, behind and above the face.
Term
Creatinine
Definition
End product of creatine metabolism; released during anaerobic metabolism. Elevated levels of creatinine are common in advanced stages of renal failure.
Term
Creatine kinase
Definition
An enzyme in skeletal and cardiac
muscles that is released into circulation as a result of tissue damage. Can be used as a laboratory indicator of muscle damage.
Term
Credentialing
Definition
A local process by which an individual is permitted by a specific entity (e.g., medical director) to practice in a specific setting (e.g., EMS agency).
Term
Crepitation
Definition
A crackling sound indicative of bone ends grinding together.
Term
Crepitus
Definition
The grating, crackling, or popping sounds and sensations experienced under skin and joints.
Term
Cricoid cartilage
Definition
Most inferior cartilage of the larynx;
only complete ring in the larynx.
Term
Cricothyroid membrane
Definition
A fibrous membrane located between the cricoid and thyroid cartilages.
Term
Cricothyrotomy
Definition
An emergency procedure performed to
allow rapid entrance to the airway (by the cricothyroid membrane) for temporary oxygenation and ventilation.
Term
Crime scene
Definition
A location where any part of a criminal act has occurred or where evidence relating to a crime may be found.
Term
Criminal law
Definition
A branch of law in which the federal,
state, or local government prosecutes individuals on behalf of society for violating laws designed to safeguard society.
Term
Cross tolerance
Definition
Decreasing responsiveness to the effects of a drug in a drug classification (such as narcotics) and the likelihood of development of decreased responsiveness to another drug in that classification.
Term
Crossmatch
Definition
The process by which blood compatibility is determined by mixing blood samples from the donor and recipient.
Term
Croup
Definition
A viral infection of the upper airway that is noto­rious for causing a "seal bark" cough.
Term
Crown
Definition
The visible part of a tooth.
Term
Crowning
Definition
The appearance of the first part of the infant at the vaginal opening during delivery.
Term
Crush points
Definition
Formed when two objects are moving toward each other or when one object is moving toward a stationary object and the gap between the two is decreasing.
Term
Crush syndrome
Definition
Renal failure and shock after crush injuries.
Term
Crust
Definition
A collection of cellular debris or dried blood; often called a scab.
Term
Cryogenic
Definition
Pertaining to extremely low temperatures.
Term
CSM
Definition
A mnemonic for circulation, sensation, and movement.
Term
Cullen's sign
Definition
Yellow-blue ecchymosis surrounding the umbilicus.
Term
Cultural beliefs
Definition
Values and perspectives common to a
racial, religious, or social group of people.
Term
Cultural imposition
Definition
The tendency to impose your beliefs, values, and patterns of behavior on an individual from another culture.
Term
Cumulative action
Definition
Increased intensity of drug action evident after administration of several doses.
Term
Current
Definition
Flow of electrical charge from one point to another.
Term
Current health status
Definition
Focus on the environmental and personal habits of the patient that may influence the patient's general state of health.
Term
Cushing syndrome
Definition
Disorder caused by the overproduc­tion of corticosteroids; characterized by a "moon face," obesity, fat accumulation on the upper back, increased facial hair, acne, diabetes, and hypertension.
Term
Cushing's triad
Definition
Characteristic pattern of vital signs
during rising intracranial pressure, presenting as rising hypertension, bradycardia, and abnormal respirations.
Term
Customs
Definition
A practice or set of practices followed by a group of people.
Term
Cyanogen chloride
Definition
A highly toxic blood agent.
Term
Cyanosis
Definition
A bluish coloration of the skin as a result of hypoxemia, or deoxygenation of hemoglobin.
Term
Cyclohexyl methyl phosphonofluoridate
Definition
G nerve agent. The G agents tend to be nonpersistent, volatile agents.
Term
Cyclothymia
Definition
A less-severe form of bipolar disorder
marked by more frequently alternating periods of a dysphoric mood that does not meet the criteria for depression and hypomania.
Term
Margination
Definition
Process of phagocytes adhering to capillary and venule walls in the early phases of inflammation.
Term
Marijuana
Definition
Dried mixture of shredded leaves, stems, and seeds of the hemp plant that usually are smoked and contain many psychoactive compounds, most notably tetrahydrocannabinol (THC).
Term
Mark 1 antidote kit
Definition
Self-injected nerve agent antidote kit consisting of atropine and 2-pralidoxime (2-PAM).
Term
Mast cells
Definition
Connective tissue cell that contains histamine; important in initiating the inflammatory response.
Term
Material safety data sheet (MSDS)
Definition
A document that contains information about the specific identity of a
hazardous chemical; information includes exact name and synonyms, health effects, first aid, chemical and physical properties, and emergency telephone numbers.
Term
Matrix
Definition
Nonliving material that separates cells in the connective tissue.
Term
Mechanical processing
Definition
Physical manipulation and breakdown of food.
Term
Mechanism of action
Definition
The manner in which a drug works to produce its intended effect.
Term
Mechanism of injury
Definition
The way an injury occurs on the body.
Term
Meconium
Definition
A dark green substance that represents the infant's first bowel movement.
Term
Medial
Definition
A position toward the midline of the body.
Term
Median lethal dose
Definition
The dose that kills 50% of the drug­
tested population.
Term
Mediastinitis
Definition
Infection of the mediastinum; a serious medical condition.
Term
Mediastinoscopy
Definition
Surgical procedure of looking into the
mediastinum with an endoscope.
Term
Mediastinum
Definition
Area that includes the trachea, esophagus, thymus gland, heart, and great vessels.
Term
Medical asepsis
Definition
Medically clean, not sterile; the goal in prehospital care because complete asepsis is not always possible.
Term
Medical direction
Definition
Physician oversight of paramedic practice; also called medical control.
Term
Medical director
Definition
A physician responsible for the oversight of the EMS system and the actions of the
paramedics; also known as a physician advisor.
Term
Medical ethics
Definition
A field of study that evaluates the decisions, conduct, policies, and social concerns of medical activities.
Term
Medical practice act
Definition
Legislation that governs the practice of medicine; may prescribe how and to what extent a physician may delegate authority to a paramedic to perform medical acts; varies from state to state.
Term
Medical terminology
Definition
Greek- and Latin-based words
(typically) that function as a common language for the medical community.
Term
Medically clean
Definition
Disinfected.
Term
Medulla
Definition
Most inferior part of the brainstem; responsible for some vegetative functions.
Term
Medulla oblongata
Definition
Lowest portion of brain tissue and the interface between the brain and the spinal cord;
responsible for maintenance of basic life functions such as heart rate and respirations.
Term
Meissner corpuscle
Definition
Encapsulated nerve endings in the superficial dermis responsible for sensing vibrations and light touch.
Term
Melancholy
Definition
An episode of dysphoric mood with disrup­tions of homeostasis, including alterations in appetite, activities, and sleep patterns; also called major or
severe depression
Term
Melena
Definition
Foul-smelling, dark, and tarry stools stained with blood pigments or with digested blood, often indicating gastrointestinal bleeding.
Term
Melting point
Definition
The temperature at which a solid changes to a liquid (e.g., ice melting to water at oo C (32° F).
Term
Membrane potential
Definition
Difference in electrical charge across the cell membrane.
Term
Menarche
Definition
A girl's first menstruation.
Term
Meninges
Definition
Covering of the brain and spinal cord; layers include the dura mater, arachnoid, and pia mater.
Term
Meningitis
Definition
Irritation of the connective tissue covering the central nervous system, often from infection or hemorrhage
Term
Meningocele
Definition
A type of spina bifida in which the spinal cord develops normally but a saclike cyst that contains the meninges and cerebrospinal fluid protrudes from an opening in the spine, usually in the lumbosacral area.
Term
Meningomyelocele
Definition
The severest form of spina bifida in which the meninges, cerebrospinal fluid, and a portion of the spinal cord protrude from an opening in the spine and are encased in a sac covered by a thin membrane; also called myelomeningocele.
Term
Menopause
Definition
Cessation of menstruation in the human female
Term
Menstruation
Definition
Shedding of endometrial lining.
Term
Mental illness
Definition
Any form of psychiatric disorder.
Term
Mental retardation
Definition
Developmental disability characterized by a lower than normal IQ.
Term
Merocrine glands
Definition
Sweat glands that open directly to the surface of the body; produce a fluid (mainly water) when the temperature rises that allows the body to dispel large amounts of heat through the evaporation process.
Term
Mesentery
Definition
Layers of connective tissue found in the peritoneal cavity.
Term
Metabolism
Definition
Sum of all physical and chemical changes that occur within an organism.
Term
Metabolites
Definition
The smaller molecules from the breakdown that occurs during metabolism.
Term
Metaplasia
Definition
The transformation of one type of mature differentiated cell into another type of mature
differentiated cell
Term
Metastatic
Definition
Spread of cancerous cells to a distant site.
Term
Metered-dose inhaler (MDI)
Definition
A handheld device that disperses a measured dose of medication in the form of a fine spray directly into the airway.
Term
Methamphetamine
Definition
A powerful, highly addictive central nervous system stimulant found in either a white powder form or a clear crystal form ("crystal meth").
Term
Methemoglobinemia
Definition
The oxidation of hemoglobin from the ferrous iron to the ferric iron state.
Term
Methicillin-resistant Staphylococcus aureus
Definition
Any of several bacterial strains of S. aureus resistant to methi­cillin (a penicillin) and related drugs; typically acquired in the hospital.
Term
Micturition
Definition
Urination.
Term
Midbrain
Definition
Lies below the diencephalon and above the pons; works with the pons to route information from higher within the brain to the spinal cord and vice versa.
Term
Middle ear
Definition
Air-filled chamber within the temporal bone; contains the auditory ossicles.
Term
Migraine headache
Definition
A recurring vascular headache characterized by unilateral onset, severe pain, sensitiv­ity to light, and autonomic disturbances during the acute phase, which may last for hours or days.
Term
Milliampere (rnA)
Definition
Unit of measure of electrical current needed to elicit depolarization of the myocardium.
Term
Millivolt (mV)
Definition
Difference in electrical charge between
two points in a circuit.
Term
Minor
Definition
In most states, a person younger than 18 years.
Term
Minute volume
Definition
Amount of gas moved in and out of the respiratory tract per minute. Tidal volume multiplied by ventilatory rate equals minute volume. The minute volume is the true measurement of a patient's ventila­ tory status and is vital in assessing pulmonary func­ tion. It ascertains the ventilatory rate and the depth of each inhalation.
Term
Miosis
Definition
Pinpoint pupils.
Term
Miscarriage (spontaneous abortion)
Definition
Loss of the products of conception before the fetus can survive on its own.
Term
Misfeasance
Definition
Performing a legal act in a harmful manner.
Term
Mitochondria
Definition
Power plant of the cell and body; site of
aerobic oxidation.
Term
Mitosis
Definition
Process of division and multiplication in which one cell divides into two cells.
Term
Mitral valve
Definition
Left atrioventricular valve in the heart; also called the bicuspid valve.
Term
Mittelschmerz
Definition
Pain occurring at time of ovulation.
Term
Mixed episode
Definition
A period of manic-like energy and agita­tion coupled with the pessimism and dysphoria of severe depression.
Term
Mobile data computer
Definition
A device used in an ambulance or first responder vehicle to retrieve and send call information; has its own memory storage and process­ ing capability.
Term
Mobile data terminal
Definition
A device used like a mobile data computer but without its own memory storage and processing capability.
Term
Mobile radio
Definition
A radio installed in an emergency vehicle; usually transmits by higher wattage than a portable radio.
Term
Modern deployment
Definition
Deployment that considers work­ load and how available resources can achieve a balance among coverage, response times, and crew satisfaction.
Term
Mold
Definition
A multicellular type of fungus that grows hyphae.
Term
Monoblasts
Definition
Immature monocytes.
Term
Monocytes
Definition
Type of white blood cell (leukocyte) designed to consume foreign material and fight pathogens; generally become macrophages within a few days after release into the bloodstream.
Term
Monomorphic
Definition
Having the same shape.
Term
Mons pubis
Definition
A hair-covered fat pad overlying the symphysis pubis.
Term
Mood
Definition
The dominant and sustained emotional state of a patient; the emotional lens through which a patient views the world
Term
Morals
Definition
Social standards that help a person define right (what a person ought to do) versus wrong (what a person ought not to do).
Term
Morbid obesity
Definition
Having a body mass index of 40 or more; equates to approximately 100 lb more than ideal weight.
Term
Morbidity
Definition
A disease state.
Term
Mortality
Definition
Death.
Term
Mortality rate
Definition
The number of patients who have died from a disease in a given period.
Term
Motor cortex
Definition
Area of brain tissue on the frontal lobe that controls voluntary movements.
Term
Mucosa
Definition
Layer of cells lining body cavities or organs (e.g., the lining of the mouth and digestive tract); generally implies a moist surface.
Term
Multiformed atrial rhythm
Definition
Cardiac dysrhythmia that occurs because of impulses originating from various sites, including the sinoatrial node, the atria, and/or
the atrioventricular junction; requires at least three
different P waves seen in the same lead for proper diagnosis.
Term
Multipara
Definition
A woman who has given birth multiple times
Term
Multiple-casualty incident
Definition
An incident involving 26 to 99 persons.
Term
Multiple organ dysfunction syndrome
Definition
Altered organ function in an acutely ill person in whom homeostasis cannot be maintained without intervention.
Term
Multiple-patient incident
Definition
An incident involving two to 25 persons.
Term
Multiple sclerosis (MS)
Definition
Autoimmune disorder in which the immune system attacks the myelin sheath surrounding neurons, causing widespread motor problems and pain.
Term
Multiplex
Definition
This system allows the crew to transmit voice and data at the same time, enabling the crew to call in a patient report while transmitting an ECG strip to the hospital.
Term
Murphy's sign
Definition
An inspiratory pause when the right upper quadrant is palpated.
Term
Muscle tissue
Definition
Contractile tissue that is the basis of
movement.
Term
Muscular dystrophy (MD)
Definition
Hereditary condition caus­ing malformation of muscle tissue and leading to malformation of the musculoskeletal system and physical disability.
Term
Mutate
Definition
To change in an unusual way.
Term
Mutism
Definition
A condition in which a person will not speak.
Term
Myasthenia gravis
Definition
Autoimmune disorder affecting
acetylcholine receptors throughout the body, causing widespread muscle weakness.
Term
Mycoses
Definition
Diseases caused by fungi.
Term
Mydriasis
Definition
Dilation of the pupils.
Term
Myelomeningocele
Definition
Developmental anomaly of the central nervous system in which a hernial sac contain­ing a portion of the spinal cord, the meninges, and cerebrospinal fluid protrudes through a congenital cleft in the vertebral column; occurs in approximately two of every 1000 live births, is readily apparent, and is easily diagnosed at birth.
Term
Myocardial cells
Definition
Working cells of the myocardium that
contain contractile filaments and form the muscular layer of the atrial walls and the thicker muscular layer of the ventricular walls.
Term
Myocardial depressant factor
Definition
An inflammatory medi­ator (cytokine) produced as a result of significant bum injury; known to affect the contractile function of the cardiac ventricles.
Term
Myocardial infarction (MI)
Definition
Necrosis of some mass of the heart muscle caused by an inadequate blood supply.
Term
Myocarditis
Definition
Inflammation of the middle and thickest
layer of the heart, the myocardium.
Term
Myocardium
Definition
Middle and thickest layer of the heart; contains the cardiac muscle fibers that cause contrac­tion of the heart as well as the conduction system and blood supply.
Term
Myoglobin
Definition
A pigment in muscle tissue that serves as an oxygen carrier (also known as myohemoglobin).
Term
Myoglobinuria
Definition
Presence of myoglobin in the urine;
almost always a result of a pathologic (disease) state such as widespread muscle injury.
Term
Myometrium
Definition
Muscular region of the uterus.
Term
Myopia
Definition
Nearsightedness; difficulty seeing objects at a distance.
Term
Myositis
Definition
A rare muscle disease in which the body's immune system is activated, resulting in inflammation and pain of muscle tissue.
Term
Myotomes
Definition
Areas of the body controlled by specific motor spinal nerves.
Term
Myxedema
Definition
Severe form of hypothyroidism characterized by hypothermia and unresponsiveness.
Term
N-95 particulate mask (medical)
Definition
A facial mask worn over the nose and mouth that removes particulates from the inspired and expired air.
Term
Nasal flaring
Definition
Widening of the nostrils on inhalation; an attempt to increase the size of the airway and increase the amount of available oxygen.
Term
Nasal polyps
Definition
Small, saclike growths consisting of inflamed nasal mucosa.
Term
Nasogastric
Definition
The administration route used when a nasa­gastric tube is in place; bypasses the voluntary swal­lowing reflex.
Term
Nasogastric tube
Definition
A tube placed by way of the nose into the stomach.
Term
Nasolacrimal duct
Definition
Opening at the medial comer of the eye that drains excess fluid into the nasal cavity.
Term
Natal
Definition
Connected with birth.
Term
National Disaster Medical System
Definition
An organized response to an event that includes field units, coordi­nation of patient transportation, and provision of hospital beds. The field component is composed of many volunteer teams of medical professionals.
Term
National Fire Protection Association (NFPA)
Definition
International voluntary membership organization that promotes improved fire protection and prevention and
establishes safeguards against loss of life and property by fire; writes and publishes national voluntary consensus standards.
Term
National Flight Paramedics Association (NFPA)
Definition
Association established in 1984 to differentiate the critical care paramedic from the flight paramedic; has developed a position statement recommending the train­ing considered necessary to perform the duties of a flight paramedic.
Term
National Highway Traffic Safety Administration (NHTSA)
Definition
An agency within the U.S. Department of Transportation that was first given the authority to develop EMS systems, including the development of curriculum.
Term
National Medical Response Team
Definition
Quick response specialty teams trained and equipped to provide mass casualty decontamination and patient care after the release of a chemical, biologic, or radiologic agent.
Term
National Registry of EMTs (NREMT)
Definition
A national organ­ization developed to ensure that graduates of EMS train­ing programs have met minimal standards by measuring competency through a uniform testing process.
Term
National Standard Curriculum (NSC)
Definition
Document providing information or course planning and struc­ture, objectives, and detailed lesson plans. It also suggests hours of instruction for the EMT-A.
Term
Natural immunity
Definition
Nonspecific immunity that mounts a generalized response to any foreign material or pathogen (e.g., inflammation).
Term
Natural killer cells
Definition
Specialized lymphocytes capable of killing infected or malignant cells.
Term
Nebulizer
Definition
A machine that turns liquid medication into fine droplets in aerosol or mist form.
Term
Necrosis
Definition
Death of an area of tissue.
Term
Necrotizing
Definition
Causing the death (necrosis) of tissue.
Term
Negative battery cable
Definition
An electrical power cable that allows the vehicle's electrical system to be grounded or neutral as an electrical circuit.
Term
Negative pressure
Definition
Pressure that acts as a vacuum, pulling more fluid from the vascular space at a faster rate than before, further depleting the intravascular volume; also known as inhibition pressure.
Term
Neglect
Definition
Failure of a parent or other person with responsi­bility for the child to provide needed food, clothing, shelter, medical care, or supervision such that the child's health, safety, and well-being are threatened with harm.
Term
Negligence
Definition
The failure to act as a reasonably prudent and careful person would under similar circumstances.
Term
Negligence per se
Definition
Conduct that may be declared and treated as negligent without having to prove what would be reasonable and prudent under similar circumstances, usually because the conduct violates a law or regulation.
Term
Nematocyst
Definition
The stinging cells many marine creatures use to envenomate and immobilize prey.
Term
Neonatal abstinence syndrome
Definition
Withdrawal symptoms that occur in newborns born to opioid-addicted mothers.
Term
Neonate
Definition
An infant from birth to 1 month of age, also called a newborn infant.
Term
Neoplasm
Definition
Cancerous growth; a tumor that may be malignant or benign.
Term
Neovascularization
Definition
New blood vessel growth to support healing tissue.
Term
Nephron
Definition
Functional unit of the kidney.
Term
Nephrotoxic
Definition
Chemicals, medications, or other substances that can be toxic to the kidneys.
Term
Nerve
Definition
Neurons and blood vessels wrapped together with connective tissue; the body's information highways.
Term
Nervous tissue
Definition
Tissue that can conduct electrical impulses.
Term
Neural tube defects
Definition
Congenital anomalies that involve incomplete development of the brain, spinal cord, and/or their protective coverings.
Term
Neuralgia
Definition
Pain caused by chronic nerve damage.
Term
Neuroeffector junction
Definition
Interface between a neuron and its target tissue.
Term
Neurogenic shock
Definition
Shock with hypotension caused by a
sudden loss of control over the sympathetic nervous system. Loss can be caused by a variety of mecha­nisms from traumatic injury to disease and infection.
Term
Neuroglia
Definition
Supporting cells of nervous tissue; functions include nourishment, protection, and insulation.
Term
Neurons
Definition
Conducting cells of nervous tissue; composed of a cell body, dendrites, and axon.
Term
Neuropeptide
Definition
A protein that may interact with a receptor after circulation through the blood.
Term
Neuroses
Definition
Mental diseases related to upbringing and personality in which the person remains "out of touch" with reality.
Term
Neurotransmitters
Definition
A chemical released from one nerve that crosses the synaptic cleft to reach a receptor.
Term
Neutralizing agent
Definition
A substance that counteracts the effects of acids or bases; brings the pH of a solution back to 7.0.
Term
Neutron radiation
Definition
Penetrating radiation that can result
in whole-body irradiation.
Term
Neutrophils
Definition
A form of granulocyte that is short lived but often first to arrive at the site of injury; capable of phagocytosis.
Term
Newborn asphyxia
Definition
The inability of a newborn to begin
and continue breathing at birth.
Term
Newly born
Definition
An infant in the first minutes to hours after birth.
Term
Nodule
Definition
An elevated, solid lesion in the deep skin or subcutaneous tissues.
Term
Noncardiogenic pulmonary edema
Definition
Fluid collection in the alveoli of the lung that does not result from heart failure.
Term
Nonfeasance
Definition
Failure to perform a required act or duty.
Term
Nonproprietary name
Definition
Generic name.
Term
Nonsteroidal antiinflammatory drug (NSAID)
Definition
Medications used primarily to treat inflammation, mild to moderate pain, and fever.
Term
Nonverbal cues
Definition
Expressions, motions, gestures, and body language that may be used to communicate other than with words.
Term
Normal flora
Definition
Nonthreatening bacteria found naturally in the human body that, in some cases, are necessary for normal function.
Term
Nuclear envelope
Definition
The outer boundary between the nucleus and the rest of the cell to the endoplasmic reticulum for protein synthesis.
Term
Nuclear membrane
Definition
Membrane in the cell that surrounds the nucleus.
Term
Nucleoplasm
Definition
Protoplasm of the nucleus as contrasted
with that of the cell.
Term
Nucleus
Definition
Area within a cell where the genetic material is stored.
Term
Nullipara
Definition
A woman who has not borne a child.
Term
Numerator
Definition
The number or mathematic expression writ­ten above the line in a fraction; the numerator is a portion of the denominator.
Term
Nystagmus
Definition
Involuntary rapid movement of the eyes in the horizontal, vertical, or rotary planes of the eyeball.
Term
Obesity
Definition
An excessively high amount of body fat or adipose tissue in relation to lean body mass.
Term
Objective information
Definition
Verifiable findings, such as information seen, felt, or heard by the paramedic.
Term
Obsessive-compulsive disorder (OCD)
Definition
An anxiety disorder marked by frequent, intrusive, unwanted, and bothersome thoughts (obsessions) and repetitive ritu­ als (compulsions).
Term
Obstructed lane +1
Definition
Blocking with an emergency vehicle to stop the flow of traffic in the lane in which the damaged vehicle is positioned plus one additional lane or the shoulder of the roadway.
Term
Occipital lobe
Definition
Most rearward portion of the cerebrum;
mainly responsible for processing the sense of sight.
Term
Occupational Safety and Health Administration (OSHA)
Definition
A unit of the U.S. Department of Labor that establishes protective standards, enforces those stan­dards, and reaches out to employers and employees through technical assistance and consultation programs.
Term
Official name
Definition
A drug's name as listed in the United
States Pharmacopoeia.
Term
Offline medical direction
Definition
Prospective and retrospective medical direction.
Term
Oils
Definition
In medicine, substances extracted from flowers, leaves, stems, roots, seeds, or bark for use therapeutic treatments.
Term
Olfactory
Definition
Sense of smell.
Term
Olfactory fatigue
Definition
Desensitization of the sense of smell.
Term
Olfactory tissue
Definition
Located within the nasopharynx; contains receptors that enable the ability of smell (olfaction).
Term
Omphalocele
Definition
Protrusion of abdominal organs into the umbilical cord.
Term
Oncotic pressure
Definition
The net effect of opposing osmotic
pressures in the capillary beds.
Term
Online medical direction
Definition
Direct voice communication by a medical director (or designee) to a prehospital professional while he or she is attending to the patient; also called direct medical direction.
Term
Oocyte
Definition
The female gamete; product of the female reproductive system.
Term
Oogenesis
Definition
Egg production.
Term
Open-ended questions
Definition
A form of interview question that allows patients to respond in narrative form so that they may feel free to answer in their own way and provide details and information that they believe to be important.
Term
Open fracture
Definition
Fracture of the bone tissue that breaks
the skin and may or may not still be exposed.
Term
Open pneumothorax
Definition
Injury to the thoracic cavity in which the cavity is breached, allowing air into the space between the lung and the chest wall.
Term
Operations
Definition
Carries out the tactical objectives of the incident commander.
Term
Ophthalmic
Definition
Route of administration in which medica­tions are applied to the eye, such as antibiotic eye drops.
Term
Ophthalmoscope
Definition
An instrument used to examine the inner parts of the eye; consists of an adjustable light and multiple magnification lenses.
Term
Opioids
Definition
Powerful pain-relieving drugs derived from the seed pods of the poppy plant or drugs that are similar
in molecular structure.
Term
Oral
Definition
A route of administration in which the medication is placed in the mouth and swallowed; the drug is absorbed through the gastrointestinal tract.
Term
Oral cavity
Definition
First part of the gastrointestinal tract; includes salivary glands, teeth, and tongue.
Term
Organ
Definition
A structure composed of two or more kinds of tissues organized to perform a more complex function than any one tissue alone can.
Term
Organ of Corti
Definition
Organ of hearing located in the cochlea.
Term
Organ systems
Definition
The coordination of several organs working together.
Term
Organelles
Definition
Numerous structures within the cell.
Term
Organic
Definition
An etiology of an illness that stems from a biologic cause, such as a stroke or electrolyte imbalance.
Term
Organism
Definition
An entity composed of cells and capable of carrying on life functions.
Term
Organophosphate
Definition
A pesticide that inhibits acetylcholinesterase.
Term
Orogastric (OG) tube
Definition
A tube placed by way of the mouth into the stomach.
Term
Oropharynx
Definition
Starts at the uvula; back of the oral cavity that extends down to the epiglottis.
Term
Orphan drugs
Definition
Products developed for the diagnosis and/or treatment of rare diseases or conditions, such as sickle cell anemia and cystic fibrosis.
Term
Orthopnea
Definition
Dyspnea relieved by a change in position (either sitting upright or standing).
Term
Orthostatic vital signs
Definition
Serial measurements of the patient's pulse and blood pressure taken with the patient recumbent, sitting, and standing. Results are used to assess possible volume depletion; also called the tilt test or postural vital signs.
Term
Osmolarity
Definition
The number, or concentration, of solute per liter of water.
Term
Osmosis
Definition
The passive movement of water from a higher to a lower concentration.
Term
Osmotic gradient
Definition
The difference in the concentration
from one side of a membrane to the other in the presence of an imbalance in the ionic concentration.
Term
Osmotic pressure
Definition
The pressure exerted by the concentration of the solutes in a given space.
Term
Osteoarthritis
Definition
A disorder in which the cartilaginous
covering of the joint surface starts to wear away, resulting in pain and inflammation of a joint; also known as degenerative joint disease.
Term
Osteomyelitis
Definition
An infection of bone.
Term
Osteoporosis
Definition
Reduction in the amount of bone mass, which leads to fractures after minimal trauma.
Term
Ostomy
Definition
Hole; usually refers to a surgically made hole in some part of the body (e.g., tracheostomy, gastrostomy, colostomy).
Term
Otic
Definition
Route of administration in which medications are applied to the ear, such as antibiotic drops.
Term
Otitis externa
Definition
A condition manifested by redness and irritation of the external auditory canal; also called swimmer's ear.
Term
Otosclerosis
Definition
Abnormal growth of bone that prevents structures in the ear from working properly; thought to be a hereditary disease.
Term
Otoscope
Definition
An instrument used to examine the inner ear; consists of a light source and magnifying lens; the tip is covered with a disposable cone.
Term
Oval window
Definition
A membranous structure that separates
the middle ear from the inner ear.
Term
Ovarian follicle
Definition
The ovum and its surrounding cells.
Term
Ovarian medulla
Definition
Inner portion of the ovary.
Term
Ovarian torsion
Definition
Twisting of an ovary on its axis such
that the venous flow to the ovary is interrupted.
Term
Ovaries
Definition
Site of egg production in females.
Term
Overdose
Definition
The accidental or intentional ingestion of an excess of a substance with the potential for toxicity.
Term
Over-the-counter (OTC)
Definition
Drugs that can be purchased without a prescription.
Term
Overweight
Definition
State of increased body weight in relation to height.
Term
Ovulation
Definition
Mid-cycle release of an ovum during the
menstrual cycle.
Term
Ovum (oocyte)
Definition
Human egg that, when fertilized, implants in the lining of the uterus and results in pregnancy.
Term
Oxidation
Definition
A normal chemical process in the body
caused by the release of oxygen atoms created during normal cell metabolism.
Term
Oxidation ability
Definition
The ability of a substance to readily
release oxygen to stimulate combustion.
Term
Oxygen-limiting silo
Definition
A vertical structure used to store ensiled plant material in an anaerobic environment.
Term
Oxyhemoglobin
Definition
Hemoglobin that has oxygen mole­cules bound to it.
Term
P wave
Definition
First wave in the cardiac cycle; represents atrial depolarization and the spread of the electrical impulse throughout the right and left atria.
Term
Pacemaker
Definition
Artificial pulse generator that delivers an electrical current to the heart to stimulate depolarization.
Term
Pacemaker cells
Definition
Specialized cells of the heart's electri­cal conduction system capable of spontaneously generating and conducting electrical impulses.
Term
Packaging
Definition
Placing the injured or ill patient in a litter and securing him or her for evacuation.
Term
Painful stimulus
Definition
Any stimulus that causes discomfort to the patient, triggering some sort of response.
Term
Palliative care
Definition
Provision of comfort measures(physical,
social, psychological, and spiritual) to terminally ill patients.
Term
Pallor
Definition
Pale, washed-out coloration of skin. Often a result of extreme anemia or chronic illness. A patient with pallor can be referred to as pallid.
Term
Palpation
Definition
The process of applying pressure against the
body with the intent of gathering information.
Term
Palpitations
Definition
An unpleasant awareness of one's heartbeat.
Term
Pancreatitis
Definition
Inflammation of the pancreas.
Term
Pandemic
Definition
A disease that affects the majority of the population of a single region or that is epidemic at the same time in many different regions.
Term
Panic attack
Definition
A sudden, paralyzing anxiety reaction char­
acterized by an overwhelming sense of fear, anxiety,
and impending doom, often with physical symptoms such as chest pain and difficulty breathing.
Term
Papillary dermis
Definition
Section of the dermis composed of loose connective tissue that contains vasculature that feeds the epidermis.
Term
Papillary muscles
Definition
Muscles attached to the chordae tendineae of the heart valves and the ventricular muscle of the heart.
Term
Papule
Definition
An elevated, solid lesion usually less than
0.5 centimeters in diameter; may arise from the epider­
mis, dermis, or both.
Term
Para
Definition
The number of pregnancies carried to term.
Term
Paracrine communication
Definition
Method of intercellular
communication in which cells communicate with cells in close proximity through the release of paracrine
factors, or cytokines.
Term
Paradoxic motion (of a segment of the chest wall)
Definition
Part of the chest moves in an opposite direction from the rest during respiration.
Term
Paranoid delusions
Definition
False perceptions of persecution and the feeling that one is being hunted or conspired against; this is the most common type of delusion.
Term
Paranoid schizophrenia
Definition
A form of schizophrenia char­
acterized by persistent preoccupation with illogical, absurd, and changeable delusions, usually of a perse­ cutory, grandiose, or jealous nature, accompanied by related hallucinations.
Term
Paraphimosis
Definition
Tight, constricting band caused by the foreskin when it is retracted behind the glans penis.
Term
Paraplegia
Definition
Paralysis of the lower limbs and trunk.
Term
Parasites
Definition
An organism that lives within or on another
organism (the host) but does not contribute to the host's survival.
Term
Parasympathetic division
Definition
A division of the autonomic
nervous system; responsible for the relaxed state of the body known as "feed and breed."
Term
Parasympathetic nervous system
Definition
The subdivision of the autonomic nervous system usually involved in activating vegetative functions, such as digestion, defecation, and urination.
Term
Parasympatholytics
Definition
Drugs that block or inhibit the function of the parasympathetic receptors.
Term
Parasympathomimetics
Definition
Drugs that mimic the parasympathetic division of the autonomic nervous
system.
Term
Parenteral
Definition
Administration route used for systemic effects and given by a route other than the digestive tract.
Term
Paresthesia
Definition
Abnormal sensation described as numb­
ness, tingling, or pins and needles.
Term
Parietal lobe
Definition
Section of the cerebrum responsible for the integration of most sensory information from
the body.
Term
Parietal pleura
Definition
Lining of the pleural cavity attached tightly to the interior of the chest cage.
Term
Parity
Definition
The number of pregnancies that have resulted in
a viable infant.
Term
Parkinson's disease
Definition
Progressive movement disorder caused by dysfunction in the cerebellum; rigidity, tremor, bradykinesia, and postural instability are characteristic.
Term
Parkmedic
Definition
A National Park Service ranger who has undergone additional wilderness medical training and who operates in certain parks under the medical direc­ tion of emergency physicians from University of Southern California-Fresno; scope of practice lies between a traditional EMT-Intermediate and EMT­ Paramedic, with additional wilderness medical training.
Term
Paroxysmal atrial tachycardia
Definition
Atrial tachycardia that
starts or ends suddenly.
Term
Paroxysmal nocturnal dyspnea (PND)
Definition
A sudden onset of difficulty breathing that awakens the patient from sleep.
Term
Paroxysmal supraventricular tachycardia (PSVT)
Definition
A
regular, narrow QRS tachycardia that starts or ends
suddenly.
Term
Partial agonist
Definition
A drug that when bound to a receptor may elicit a physiologic response, but it is less than that of an agonist; may also may block the response of a competing agonist.
Term
Partial pressure
Definition
The pressure exerted by an individual
gas in a mixture.
Term
Partial seizure
Definition
A seizure confined to one area of the
brain.
Term
Partial-thickness burn
Definition
Bums that involve any layer of the dermis. The depth of these bums varies and depends on location, so they are further subcatego­ rized as superficial partial-thickness or deep partial­ thickness burns. Also called second-degree bums.
Term
Partially sighted
Definition
Level of vision in persons who have
some type of visual problem and may need assistance.
Term
Passive immunity
Definition
Induced immunity that only lasts as long as the injected immune agents are alive and active (e.g., immunoglobulin injection).
Term
Passive range of motion
Definition
Degree of movement at a joint determined when the examiner causes the movement with the patient at rest.
Term
Passive transport
Definition
The ability of a substance to traverse
a barrier without any energy input; generally occurs from a higher to a lower concentration.
Term
Past medical history
Definition
A summary of all past health­
related events.
Term
Patch
Definition
A flat, circumscribed, discolored lesion.
Term
Pathologic fracture
Definition
Fractures that occur as a result of
an underlying disease process that weakens the mechanical properties of the bone.
Term
Pathophysiology
Definition
Functional changes that accompany a particular syndrome or disease.
Term
Patients with terminal illness
Definition
Patients with advanced stage of illness or disease with an unfavorable progno­ sis and no known cure.
Term
Pattern recognition
Definition
Gathering patient information, relating it to the health care professional's knowledge
of pathophysiology and the signs and symptoms of illnesses and injuries, and determining whether the patient's presentation fits a particular pattern.
Term
Pattern response
Definition
Anticipating the equipment and emer­ gency care interventions needed on the basis of the patient's history and physical examination findings.
Term
Patterned injuries
Definition
Those that leave a distinctive mark, indicating that an object was used in the assault
(e.g., cigarette bums, electrical cord whipping, human
bites, glove injuries, attempted strangulation, and slaps).
Term
Peak expiratory flow
Definition
The greatest rate of airflow that
can be achieved during forced expiration beginning with the lungs fully inflated.
Term
Peak flow meter
Definition
A device used to assess the severity of
respiratory distress.
Term
Pediculosis
Definition
Human infestation with lice.
Term
Pelvic inflammatory disease (PID)
Definition
An infection of a woman's reproductive organs, usually from a bacterial infection, that spreads from the vagina to the upper parts of the reproductive tract.
Term
Penetrating trauma
Definition
Any mechanism of injury that causes a cut or piercing of skin.
Term
Penis
Definition
Male sex organ with three columns of erectile tissue; transfers sperm during copulation.
Term
Percussion
Definition
A diagnostic technique that uses tapping on the body to differentiate air, solids, and fluids.
Term
Performance-based response system
Definition
A contractual agreement between the EMS provider and the govern­
ment authority to provide ambulance response to a particular municipality or region with time require­
ments for each response and total responses on a monthly basis.
Term
Perfusion
Definition
Circulation of blood through an organ or a part of the body.
Term
Pericardia!cavity
Definition
The potential space between the two layers of the pericardium.
Term
Pericardia!effusion
Definition
An increase in the volume and/or character of pericardia!fluid that surrounds the heart.
Term
Pericardia} tamponade
Definition
Life-threatening injury in which blood collects within the pericardium until the increasing pressure prevents the heart from filling with blood, causing death.
Term
Pericardiocentesis
Definition
A procedure in which a needle is inserted into the pericardia!space and the excess fluid
is drawn out (aspirated) through the needle.
Term
Pericarditis
Definition
Inflammation of the double-walled sac
(pericardium) that encloses the heart.
Term
Pericardium
Definition
Two-layer serous membrane lining the pericardial cavity.
Term
Perinatal
Definition
From the twenty-eighth week of gestation
through the first 7 days after delivery.
Term
Perineal body
Definition
See Perineum.
Term
Perineum
Definition
The tissue between the mother's vaginal and
rectal openings; may be tom during delivery.
Term
Periodontal membrane/ligament
Definition
Ligamentous attach­
ment between the root of a tooth and the socket of the bone within which it sits.
Term
Periosteum
Definition
Fibrous connective tissue rich in nerve endings that envelops bone.
Term
Peripheral nervous system
Definition
All the nerves outside the central nervous system.
Term
Peripheral vein
Definition
A vein outside the chest or abdomen, such as the veins of the upper and lower extremities.
Term
Peripherally inserted central catheter (PICC) line
Definition
A
thin tube inserted into a peripheral vein (usually the
arm) and threaded into the superior vena cava to allow fluid or medication administration.
Term
Peristalsis
Definition
The wavelike contraction of the smooth muscle of the gastrointestinal tract.
Term
Peritoneal cavity
Definition
The space between the parietal and visceral peritoneum; also called the peritoneal space.
Term
Peritoneum
Definition
Double-layered serous membrane that lines the abdominal cavity and covers the organs located in it.
Term
Peritonitis
Definition
Inflammation of the peritoneum, typically
caused by infection or in response to contact with blood or digestive fluids.
Term
Peritonsillar abscess (PTA)
Definition
An infection of tissue
between the tonsil and pharynx, usually the result of a significant infection in the tonsils.
Term
Permeability
Definition
Ability of a membrane channel to allow passage of electrolytes once it is open.
Term
Permissible exposure limit
Definition
Allowable air concentration
of a substance in the workplace as established by the Occupational Safety and Health Administration; these values are legally enforceable.
Term
Permit-required confined space
Definition
A confined space with one or more of the following characteristics:
(1) contains or has a potential to contain a hazardous atmosphere; (2) contains a material with the potential
for engulfing an entrant; (3) has an internal configura­ tion such that an entrant could be trapped or asphyxi­ ated by inwardly converging walls or by a floor that slopes downward and tapers to a smaller cross-section; or (4) contains any other recognized serious safety or health hazard.
Term
Personal protective equipment (PPE)
Definition
Equipment used to protect personnel; includes items such as gloves,
eyewear, masks, respirators, and gowns.
Term
Personal space
Definition
The area around an individual that the person perceives as an extension of himself or herself. In the United States, personal distance is 1.5 to 4 feet.
Term
Personality disorders
Definition
Patterns of interacting with others and the world that are rigid and harmful,
causing social and occupational problems.
Term
Pertinent negative
Definition
In a patient assessment, the signs and symptoms found not to be present that support a working diagnosis.
Term
Pertinent positive
Definition
In a patient assessment, the signs and
symptoms found to be present that support a working diagnosis.
Term
Pesticide
Definition
A chemical material used to control a pest
(insect, weed, etc.).
Term
Petechiae
Definition
A tiny pinpoint rash on the upper area of the neck and the face; may indicate near strangulation or suffocation; caused by an occlusion of venous return from the head while arterial pressure remains normal; may be present in mothers after childbirth; reddish­ purple nonblanchable discolorations in the skin less than 0.5 em in diameter.
Term
pH
Definition
A numeric assignment used to define the hydrogen ion concentration of a given chemical. The lower the pH, the higher the hydrogen ion concentration and the more acidic the solution.
Term
Phagocyte
Definition
Cells that are part of the body's immune
system that play a predominant role in the destruction of invading microorganisms.
Term
Phagocytosis
Definition
Ingestion and digestion of foreign materials by phagocytes (cells, such as macrophages, designed to perform this function).
Term
Pharmaceutics
Definition
The science of preparing and dispensing
drugs.
Term
Pharmacogenetics
Definition
The study of inherited differences
(variation) in drug metabolism and response.
Term
Pharmacokinetics
Definition
The process by which a drug is absorbed, distributed, metabolized, and eliminated by the body.
Term
Pharmacologic restraints
Definition
Agents such as sedatives that can suppress a patient's neurologic and/or motor capa­ bilities so that the threat to the paramedic is reduced; also known as chemical restraints.
Term
Pharmacology
Definition
The study of drugs, including their actions and effects on the host.
Term
Pharmacopeia
Definition
A book describing drugs, chemicals, and
medicinal preparations in a country or specific geographic area, including a description of the drug, its formula, and dosage.
Term
Phases of rescue
Definition
The training and organizational concept that groups all the activities that take place at a typical vehicle crash with entrapment into four cate­ gories, with each known as a phase of rescue.
Term
Phlebitis
Definition
Inflammation of a vein.
Term
Phobia .
Definition
An intense fear of a particular object or situation.
Term
Phosphate
Definition
A salt of phosphoric acid that is important in the maintenance of the acid-base balance of the blood.
Term
Phospholipid bilayer
Definition
A double layer composed of three
types of lipid molecules that comprise the plasma membrane.
Term
Photoreceptor cells
Definition
Rods and cones contained in the
sensory part of the retina; they relay impulses to the optic nerve.
Term
Photosensitivity
Definition
A condition in which the patient's eyes are sensitive or feel pain when exposed to bright
light.
Term
Physical abuse
Definition
Inflicting a nonaccidental physical injury on another person such as punching, kicking, hitting, or biting.
Term
Physical disabilities
Definition
Disabilities that involve limitation
of mobility.
Term
Physical restraints
Definition
Straps, splints, and other devices that prevent movement of all or part of the patient's body.
Term
Physician advisor
Definition
A physician responsible for the over­
sight of the EMS system and the actions of the para­
medics; also known as a medical director.
Term
Physiology
Definition
Study of how the body functions.
Term
Pia mater
Definition
Last meningeal layer; adheres to the central nervous system.
Term
Pierre Robin sequence
Definition
A congenital anomaly charac­ terized by a very small lower jaw (micrognathia), a tongue that tends to fall back and downward (glossop­ tosis), and cleft palate.
Term
Pill
Definition
Dried powder forms of medication in the form of a small pellet; the term "pill" has been replaced with tablet and capsule.
Term
Pinch points
Definition
A machinery entanglement hazard formed when two machine parts move together and at least one of the parts moves in a circle.
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