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Head and facial Trauma- CH 24
Mosby's Paramedic Textbook 3ED-R
118
Health Care
Undergraduate 1
04/01/2012

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Cards

Term
What is the most common cause of maxillofacial trauma
Definition
motor vehicle crashes
Term
How does the face receives it blood supply
Definition
from the branches of internal and external carotid arteries
Term
Define Ecchymosis
Definition
The passage of blood from ruptured blood vessels into subcutaneous tissue, marked by a purple discoloration of the skin.
Term
What is the most commonly broken bone of the face
Definition
nose
Term
What S&S would you see with an anterior dislocation of the mandible
Definition
jaw lock in an open position
Term
What bones are in the lower third of the face
Definition
mandible
Term
What bones are in the middle third of the face
Definition
maxilla, xygoma, floor of the orbit and nose
Term
What is a Le Fort 1 fracture
Definition
fracture involves the maxilla up to the level of the nasal fossa
Term
Le Fort II fracture
Definition
nasal bones and medial orbits and is generally shaped like a pyramid
Term
Le Fort III fracture
Definition
craniofacial dislocation and involves all bones of the face
Term
What is donkey face
Definition
Its a lengthening of the face because of multiple fx
Term
another term for the cheek bone
Definition
zygoma
Term
what is S&S for a zygomatic fx
Definition
flatness in the cheek area, numbness of the cheek, nose and upper lip
Term
This is the weakest part of the orbital structure
Definition
The orbital floor
Term
this fx happens when an object of greater diameter than that of the bony orbital rim strikes the globe of the eye and surrounding soft tissue
Definition
blow out fx
Term
What is the best way to control epistaxis
Definition
have the patient lean forward while compressing the nares
Term
Another term for the outer rim of the ear
Definition
pinna
Term
how long should you allow irrigation fluid to sit in the ear
Definition
3-4 min
Term
This is an injury to the middle ear caused by changes in barometric pressure great enough to produce inflmmation and injury
Definition
Barotitis
Term
What is Boyles law
Definition
constant temperature, the volume of gas is inversely proportional to the pressure (Think of boiling water boils at different temps at different altitudes)
Term
What maneuver is used to equalized the pressure in the middle ear
Definition
Valsalvas
Term
Loss of a portion of the visual field possibly indicates this
Definition
detachment of retina
Term
What is normally the first step in examination of the patients eyes
Definition
visual acuity
Term
damage to this muscle is a common cause for an abnormal pupil response
Definition
pupillary sphincter muscle
Term
what are some uncommon reasons for abnormal pupil response
Definition
damage to the optic nerve or globe and sometimes tearing
Term
What cranial nerves are responsible for eye movement
Definition
III, IV, and VI
Term
what are the involuntary eye muscles of the eye
Definition
the iris and the ciliary muscle
Term
what part of the nervous system controls eye muscles
Definition
sympathetic nerves
Term
if a foreign body in the eye is suspected how do you inspect the eye
Definition
inspect the inner parts of the upper and lower eye lid and the conjunctiva
Term
what is a type of ophthalmic anesthetic
Definition
tetracaine
Term
corneal abrasions commonly result from this foreign body
Definition
contact lenses
Term
how do you prevent further injury of a suspected corneal abrasion
Definition
cover both eyes to prevent eye movement
Term
What is hyphema
Definition
bleeding into the anterior chamber
Term
when both eyes move in the same direction it called _____ movement
Definition
consensual
Term
How long should you irrigate they eyes after a chemical spash
Definition
20 min
Term
when should paramedic remove contact lenses
Definition
as a general rule they should not unless its a chemical burn
Term
what is the normal amount of teeth
Definition
32
Term
What are the section to the tooth
Definition
crown and root
Term
what are the hard tissues of the tooth
Definition
enamel, dentin (ivory) and cementum
Term
Permanent teeth have a good rate of survival if replanted within this time frame
Definition
1 hour
Term
What are deciduous teeth
Definition
they are milk teeth or baby teeth
Term
When might med control ask you to replant the toot into the socket
Definition
when the tooth has been out less than 15 min
Term
What solution is used to save teeth
Definition
Hanks solution or whole milk
Term
Can you us sterile saline for tooth storage
Definition
yes for 1 hour or less
Term
what part of the tooth is critical for the survival of the re implanted tooth
Definition
the fibrous tissue of the periodontal ligament
Term
where is zone one of the neck
Definition
sternal notch to the top of the clavicles or cricoid carilage
Term
Injuries to this neck zone carries the highest mortality rate
Definition
zone 1 because of the major vessels that lie below the area
Term
zone two of the neck
Definition
clavicles or cricoid cartilage to the angle of the mandible
Term
injuries in this neck zone are the most common
Definition
zone II
Term
where is zone III
Definition
part of the nekc above the angle of the mandible
Term
What major structures lie in zonee II
Definition
carotid artery, jugular vein, trachea, larynx, esophagus and cervical spine
Term
What is the benefit of intubation for a patient with a damaged neck other than oxygenation
Definition
it stabilizes damaged areas of the neck and protect the neck
Term
This is the most commonly injured structure in the neck
Definition
blood vessels
Term
when can you use hemostats in the prehospital setting
Definition
NEVER
Term
If you suspect an air embolism how should you position the patient
Definition
patient should be on the left side with head lower than the feet
Term
what is mediastinitis
Definition
gastric contents released into the thoracic cavity
Term
Are esophageal injuries easy to diagnose?
Definition
No because they are commonly looked over because of other obvious injuries
Term
What are S&S of esophageal injury
Definition
subcutaneous emphysema, neck hematoma, bleeding fro the mouth and nose
Term
Patients suspected of an esophageal tear should be placed into this position
Definition
semi-fowler
Term
What is the most common scalp injury
Definition
irregular linear laceration
Term
If not contraindicated by injury, how should the paramedic position head soft tissue injury patients
Definition
semi fowler
Term
What is the most common skull fx
Definition
linear fx
Term
When would you see a patient with a basilar skull fx
Definition
after major impact trauma
Term
Raccoon eyes
Definition
ecchymosis of one or both orbits
Term
What type of fx causes raccoon eyes
Definition
sphenoid sinus
Term
Battles sign
Definition
bruising behind the ears
Term
what type of fx causes battles signs
Definition
fracture of the temporal bone
Term
Is battles sign and raccons eyes an early or late sign
Definition
late
Term
what nerve is commonly damaged with a basal skull fx
Definition
olfactory nerve- loss of smell or impairment of taste
Term
What normally causes depressed skull fx
Definition
small object at a high rate of speed
Term
What illness is associated with open vault fx
Definition
meningitis
Term
The opening in the skull where the 12 cranial nerves leave the skull
Definition
foramina
Term
What is a primary brain injury
Definition
refers to direct rauma to the brain and to the associated vascular injuries that occurred from the initial injury
Term
What is a secondary brain injury
Definition
result from intracellular and extracellur derangement that probably were initiated at time of the injury
Term
What is an example of a secondary brain injury
Definition
hypoxia, hypocapnia and hypercapnia from airway compromise resulting from the trauma
Term
This is a fully reversible brain injury that does not result in structural damage to the brain
Definition
Concussion
Term
What is the major S&S associated with concussion
Definition
altered level of consciousness that usually lasts less than 5 min
Term
altered level of consciousness from a concussion is a disturbance to this part of the brain
Definition
reticular activating system
Term
what is retrograde amnesia
Definition
no recall of the events befor the injury
Term
what is antegrade amnesia
Definition
amnesia that exists after the recovery of consciousness
Term
when does a concussion injury most severely affect the patient
Definition
at the time of injury
Term
this brain injury is a result in minute petechial bruising of brain tissue
Definition
moderate diffuse injury
Term
what phobia do brain injury patients often have
Definition
photophobic- fear of bright lights
Term
what is the most severest form of brain injury
Definition
Diffuse axonal injury- DAI
Term
What happens in a DAI
Definition
acceleration and deceleration forces tear and shear axonal nerves
Term
The brain occupies this percentage of intacranial space
Definition
80%
Term
What are the four areas of the brain
Definition
brainstem, diencephalon, cerebrum and the cerebellum
Term
the medulla, pons and midbrain are in this area of the brain
Definition
brain stem
Term
The thalamus and hypothalamus are in this area of the brain
Definition
diencephalon
Term
What area of the brain is most often contused
Definition
the front
Term
Brain tissue that is injured at the site of impact
Definition
coup
Term
brain tissue injured on the opposite side of impact
Definition
coutercoup
Term
Headache, nausea, vomiting and seizures associated with head trauma are caused by
Definition
Increased ICP
Term
What is a intraparenchymal hemorrhage
Definition
bleeding directly into the brain tissue
Term
what is the glucose and o2 requirement of the brain
Definition
20% of o2 and 25% of total body glucose
Term
What is the normal mean arterial pressure
Definition
85-95 mm Hg
Term
What is normal ICP
Definition
0-15 mm Hg
Term
What is the critical minimum threshold for cerebral perfusion pressure
Definition
60 mm Hg
Term
What happens when CPP decreases
Definition
Cerebral vasodilation
Term
What is the ideal systolic blood pressure to maintain adequate mean arterial pressure
Definition
90 mm Hg
Term
What has the greatest effect on intracerebral vascular diameter and resistance
Definition
PCO2
Term
This hematoma is associated with a laceration or tear of the middle meningeal artery
Definition
epidural hematoma
Term
what brain bleed has a lucid interval
Definition
acute epidural
Term
what does the suffix frank mean
Definition
rapid and significant
Term
this refers to intracrainial bleeding into the CSF
Definition
Subarachnoid hematoma
Term
Patients with this brain bleed often complain of a sudden and sever headache
Definition
Subarachnoid hematoma
Term
What is a cerebral hematoma
Definition
bleeding into the brain tissue
Term
What GCS score is associated with intubation
Definition
less than 8
Term
When can you administer D 50 to patients with head injuries
Definition
when hypoglycemia is confirmed
Term
This is the most common cause of death in pediatric trauma patients
Definition
respiratory failure
Term
What medical conditions often result from a myocardial contusion
Definition
cardiac rupture, traumatic myocardial infarction, ventricular aneurysm
Term
What are S&S of a myocardial contusion
Definition
ecg abnormalities, new cardiac murmur, pericardial friction rub, persistent tachycardia and palpitations
Term
What do myocardial contusion patients often complain of
Definition
chest pn similar to a MI
Term
This degree of sprain has no joint instability
Definition
first degree
Term
This degree of sprain has swelling and bruising
Definition
second degree
Term
This degree of sprain is when the ligaments are completely torn
Definition
third degree
Term
What are the two different joint dislocations
Definition
luxation- complete
subluxation- incomplete dislocation
Term
This is inflammation of a small fluid filled sac taht acts as a cushion at the pressure point near joints
Definition
Bursitis
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