Term
what 2 muscle relaxants can be given IM to break a laryngospasm? |
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Definition
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Term
List 3 organs/body parts most commonly injured in blunt trauma? |
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Definition
chest viscer, brain and extremities |
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Term
what are the two most common causes of dath from blunt trauma |
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Definition
head injury and aortic injury |
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Term
identify the sistes of coumadin clotting factors |
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Definition
3, 9, 9, 10 protein C and protein S
Coumadin inhibits epoxide recuctase - diminihing available vitamin K in the caroxylation reaction. ac |
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Term
describe the etiology of bleeding during or following a massive blood transfusion |
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Definition
involves the dilution of factors, hypoterhmia, tissue hypoperfusion/ischemia, acidosis and ptoential DIC. two of the most important factors in teh ocagulaopathy of the massive transfusion are the volume of blood given and the duration of hypotension or hypoperufsion. Pts who are well perfused and not hypotensive foa longer period can tolerate mutiple units of blood without dveloping a coagulopathy. pts who are hypotensive and have received many units of blood probably has a coagulopathy from a condition that resembles DIC and dilution of coagulation factors from stored bank blood. |
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Term
define anesthesia workstation. what governing body defines the AGM |
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Definition
defined by the ASTM international 0 system for administering anesthetics to pts consisting of anesehesia gas supply device, the anesthesia ventilator, montiroing devces and protection devices |
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Term
the anesethesia machine proper contains what two componets |
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Definition
the pressure regulating componets and gas mixing componets |
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Term
in order to comply with ASTM F1850 an anesthesia workstation must have 13 required componets: list 7 of these required componets |
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Definition
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battery backup for 30 minutes
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alarms - high, low and medium priority
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various monitors
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breathing circuit limited to 125 cm of water
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nondetachable electrical supply cord or a cord resistant to detachment,
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cylinder supplies
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flowmeters
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an oxygen flush capable of 35-75 liters flow that does not go through an vaporizers
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vaporizers
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only one common gas outlet 22 mm od, 15 mm id
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pipeline gas supply
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checklist must be provided - electronic or paper
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digital interface
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Term
list 8 required monitors on the AGM
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Definition
- exhaled volume
- inspired oxgyen - with high priority alarm of 30 seconds of oxygen falling below 18%
- oxygen supply failure alrm
- hypoxic gaurd system that must protect againt less than 21% inspired oxyugen in use if N2O is present
- anesthetic vapor concentration
- pulse oximetery
- blood pressure monitoring
- ECG
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Term
what is the maximim time a high priority alarm can be silenced |
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Definition
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Term
List 7 criteria for AGM cyclinder supplies |
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Definition
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one cylinder attached to the machine
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hanger yoke must have PIS index
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hanger yoke must have a clamping device that resists leaks
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hanger youke must have a filter
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hanger yoke must have a check valve to prevent transfilling
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hanger yoke must have a cylinder pressure gauge
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cylinder pressure regulators
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Term
list 7 features of AGM workstation flowmeters |
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Definition
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single control for each flow for each gas
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each flow control must be next to a flow indicator
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oxygen flow control knob must be uniquely shaped
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valve stops are required such that excessive rotaion will not damage the flowmeter
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oxygen flowmeter is to the right of the flowmeter bank
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oxygen enters the common manfiold downstream of other gases
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an auxilaiary oxygen flow meter is strongly recommended
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Term
what 5 features are chacteristic of AGM vaporizers? |
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Definition
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concentration calibrated
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must have interlock
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must indicate the liquid level to prevent overfilling
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should use key filler devices
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must not discharge liquid from the vaporaizer even at maximum fresh gas flows
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Term
Peipeline gas supply to the AGM must meet what 5 criteria: |
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Definition
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pressure gauge must be present
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inlets for atleast oxygen and nitrous oxide
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protected DIS
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inine filter
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check valve
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Term
oxygen has 5 tasks in the AGM- what are these 5 tasks? |
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Definition
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proceeds to teh fresh gas flow meter
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powers the oxygen flush
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activates fail safe mechanism
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activates oxygen low pressure alarm
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compresses the bellows of mechanical ventilators
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Term
define anesthesia awareness |
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Definition
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explicit or consocius memor and implicit or unconscious memore.,
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explicit memory refers to the conscoius recollection of previous experiences and is equivalent to remembering
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awareness during anestehsia describes conscious recall (explicit memory) of intraoperative events. many more anestehtized pts may respond to commands, yet lack the conscious recall of intraoperative events
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Term
what is teh incidence of awareness during anesthesia in the US? |
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Definition
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Term
do episodes of awarenes sduring anesethesia occur more often during induction, mainenace or emergence? |
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Definition
most often during mainenance of anesthesia, less during induction and least during emergence |
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Term
list 4 situations that pose an increased risk of awareness during anesthesia |
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Definition
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unsafe to administer sufficient anesthesia - high risk
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mistake / failure in anesthesia delivery
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anesethetic technique tha tresults in inadeuqate anesthesia
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pts needs are under appreciated
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Term
give 3 examples of situations that may be unsafe to deliver anesthesia - may increase awareness during anesthesia |
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Definition
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Term
give 5 examples/mistakes in anestehisa delivery that lead to increased risk of awareness during anesthesia |
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Definition
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inhaltion not turned on/empty vaporizer
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use of NMB that leads to underappreciation of light anesthesia
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difficult airway with prolonged intubation attemps
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TIVA
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Term
give 4 examples underappreciated pt needs that may predispose to increased risk of awareness during anesthesia: |
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Definition
pharmacodynamic resistance - opioid benzo tolerance
altered P450 metabolism
increased P450 activty
mutations of melancortin-1-gene assoicated with red hair type |
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Term
identify the most common posteroptive complication in the older pt |
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Definition
neurologic - postoperative deliruium |
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Term
describe the Brice Interview |
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Definition
Brice Questionnarire developed in 1970 is an accepted tool for detecty postoperative awarnesss. the modificed interveiw comprises 5 questions:
- what is the last thing you rember before going to sleep?
- what is the first thing yoiu remember after waking up?
- do you remember anyting going to sleep adn waking up?
- did you dream during your procedure?
- what was the worst thing about your procedure?
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Term
which neuromuscular blocking drug is associated with the greatest incidence of anaphlaxsis? |
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Definition
neuromuscular blocking agents triger more than 35% of the allergic reaction. Sux is the most common offender followed by atracurium, cisatracurium, vecuronium and rocuronium |
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Term
what are the causes of dyspnea following a neuraxial block especially in a high spinal |
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Definition
following the administration of neuraxial techniquie the pt may c/o dyspnea despite have a normal or increased minute ventilation. the most common cause of the this complaint is hypotension - therefor the complaint of difficulty in breathing should prompt immediate assessment of blood pressure and treatmetn. other causes of dyspnea are the blunting of throacic proprioception - inability to feel the chest wall move during breathing, the partial blockade of abdominal and intercostal muscles and the recumbent postion, which increases the pressure of the abdominal contents against the diaphragm. a normal speaking voice, as opposed to faint gasping voice suggests ventilation is normal |
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Term
does ang II constrict the azfferent arteriole of the glomerulus, the efferent arteriole of the glomerulus or both? |
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Definition
both - preferentially cosntricts the effernt |
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Term
what is the best indicator of periperative renal function for the pt undergoing an AAA repair? |
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Definition
the best predictor of postoperative renal function is the pts preopertive renal function. UOP does not predict post op renal function |
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Term
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Definition
rapid swelling of th edermis, SQ, mucosa and submucosa due to increased vascular permeability, its eith heridatry or acquired |
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Term
describe herediatry angioedema |
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Definition
heridatry angioedema is an automsal dominant genetic diseasez chacterized by life trheatening episodes of angioedema involving the SQ and submucosa of the GI tract and airway often manifested as abdominal pai, resulting inICU admiission. HAE exists that occurd due to unopposed activation of multiple kinnins and mediators including kalkrine and bradykinin causing increased vascular permeability and edema |
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Term
what are the treatments for hereditary angioedema: |
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Definition
supprotive b/c epi, antihistamines and corticosteroids often fail to work. plasma transufsions have been reported to resolve attacks and make them worse. the severity of attacks can be prevented or decreased by drugs that are either plasmin inhbitiors (aminocaproic acid and tranexamic acid) or androgens (danazol) the first kinin patway modulator, excallantide has also been liscensed recently in the US for treating HAE attack |
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Term
what is tramadol (Ultram)? describe the mechanism of action of tramadol |
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Definition
tramadol is an atypical opioid specefically synthetic 4-pehylpiperidien analog of codeine with dual mechanism of action. tramdol weakly stimulated mu opioid recetpor and to a lesser estent the delta and kappa opoid recetpors. tramadol like TCAs preoduces analgesia by activation spinal inbition of pain by dereasing the reuptake of NE and 5HT. the opioid effects of tramdol are mediated by metabolite fromed by 0demthylation by CYP450 2D5 in other words tramadol is a prodrug |
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Term
what are some thereapuetic uses of tramadol? |
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Definition
control postoperative pain, comparable to ASA with codient of ibuprofen. tramadol mixed with acetaminopehn is the only treatment of fibromyalgia -
good to give this drug with regional |
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Term
what is the maimum daily ose of tramdol |
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Definition
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Term
tramdol may produce life threatening serotonin syndrome if given to pts taking what other agents |
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Definition
MAOI, serotonin/NE reuptake inhbitior, SSRIS and TCAs |
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Term
List 4 advanatages tramdol provides over other opioids, state 4 side effects of tramadol |
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Definition
tramdoal is advantages to other opioids owning to its lack of respiratory depression, organ toxicity and depression of GI motility as well as its low potential for abuse. the most common side effects of tramdol are n/d/c |
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Term
what 7 agents are given for sphincter of oddi spasm |
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Definition
1-2 mg gluagon
naloxine
nalbuphine
atropine
robinal
NTG
VA |
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Term
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Definition
second gneration anticovulsants - branched chain amino acids and chemical analogues of neurotransmitter GABA |
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Term
describe the MOA for gabapentinoids |
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Definition
despite their name, neither gabapentinoids (gabapentin and pregabalin) has activity in the GABA neuron transmission system. Gabapentinoids do not bind to the GABA receptors and do not affect the uptake or metabolism of GABA. Gabapeninoids exhibit anticonvulsant, anxiolytic and central antihyperalgesia effects. teh exact MOA of gabapentinoids is unertian,, but both drugs have high binding affinities for presynaptic VG-Ca channels in the CNS. Gabapentoids appear to exert their analgesic effects by reducing the hyperexcitability of the dorsal horn neurons caused by tissue damage. the anlagesic mechanism of gabapentinoids may invovle 3 distinct processes: decrease releae of NT via presynaptic binding of Ca recetpor, redistribution of the Ca channel away from its functional membrane bound site to its nonfunctional cystolsolic site and inhbition of activation of the transcription factor KB, which reduce gen transcription of COX23 and interlukin 6 |
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Term
what are the therapuetic uses of babapentinoids, gabapentin and pregablain?
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Definition
widely used for the mgmt of chronic pain, postherpic neuralgia, diabetic neuropathy, trigeminal neuralgia. it should be part of any multimodal analgesi regimen for perioeprative pain managment |
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Term
describe teh pharmacokientics of the gabapentoids |
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Definition
they are oral meds that are excreted unchanged int he urine. for the most part gabapentin and pregablain have minimal drug interactions making them versatile drugs in combinations with other neuropathic pain medications. gabapentin is available in generic form whreas pregabalin is more potent, has a high bioavailability, fewere side effects and shorter tiration period that is better tolerate dby patients |
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Term
what is cerebral oximetery? |
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Definition
non-invasive montior used to mearue regional blood hgb sautration via near infrared optical spectroscopy (NIRS) the technology is similar to pulse oximetry and can be used for pts at risk for cva |
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Term
briefly describe the technique of cerebral oximetery via near infrared optical spectocopy |
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Definition
to measure the regional HGB oxygen saturation via trans cranial near infrared spectroscopy (NIRS), an infrared light source contained in self adhesive patch is affixed to the forehead. b/c the human skull is transluncent to infrared light, photons are transmitted through the skull and underlying tisuses to the outer layer of the cerbrla cortex. adjacent sensors seperate photons reflected from the skin, msucle, skull and dura from those of the brain tissue. NIRS measures all HGB< pulseatile and nonpulsatile in a microvascular bed,. the measurement is theough to reflect approx 75% venous blood. th eratio remains nearly constant in normoxia, hypoxa and hypocapnia. cerebral oximetery apepears to both reliably quantify changes from an individucalized baseline and offere an objective meaure of regional hypoperufsion. cerebral oximetery has the advanage that it may be used during nonppulseatile CPB and circulatory arrest |
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Term
Ultrasound guided reional anesthesia has become a routine technique and may become the gold standare for performing regional anesthesia nerve blocks. list 9 advanatges of URGA of tehse advantages what is the best things about it |
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Definition
- direct visulaization of nerves and adjacent anatomic structures
- observing local anesethtic spread in real time
- detecting variations in anatomy
- faster onset times
- improvement in block quality
- use of lower more precise doses of local
- possible increase in safety
- less painful administration compared with nerve stimulatr
- high pt satisfaction
knowing where the tip of the needle is in reatlion to antaomoical structurs and being able to see the spread of local is the best thing about URGA |
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Term
define ultrasound. what is sound? |
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Definition
the term ultraound refers to high-frequency sound waves above the range of human hearing; the uper limit of human hearing is about 20 KHz (20,000 Hz) therefore US is mechanical virations greater than 20 KHz. sound is mechanical wave in which the wave motion trasnports energy and momentum from one point in space to anotehr without the tranport of matter. sound waves are logitudinal wave so f compression and rarefactoin refers to low pressure zones. |
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Term
Medical US machine operates in what freuency range? |
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Definition
2-15MHz )megahertz, million cycles per seconds) |
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Term
a sound wave is modeled by a sine wave defined by 3 key parameter, list them |
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Definition
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a sound wave is defined by a specific wave length- meaured in units of distance, amplitude
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meaure in decibels dB- a logarithmic measure
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frequcny - meausured by hertz or cycles per second
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Term
what is the velocity of sound in soft tissues |
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Definition
soft tissue velocity is about 1540m/s therefore 6.5 microseconds elapse for each cm of soft tissue traversed by the sound wave |
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Term
describe teh relationship between ultrasound frequency and depth of tissue penetration. the longer the wavelenght the deper the tisuse penetration. in general hgiher frequency ultraosund probes (10-13MHz) are best suited for visualizing structures less than 4 cm deep from the skin. For structures deeper than 4 cm from the skin, lowerfrequency probles are most useful (2-5) |
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Definition
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Term
sounds above 100 KHz do not occur naturally; how then are US waves (2-15 MHz) generated? |
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Definition
US is generated by piezoelectric effect. the piezoelectric effect is a phenomenon exhibited by generation of an electric charge in response to mechanical force applied on certian naturally occuring or man-made materials. conversely, mechnical deformation can be produced when an elctric field is applied to such material, also known as the piezoelectric effect. US transducers consist of linear or curvilinear arrays of syntehtic piezoelectic cyrtals that produce high fequency sound wavesin response to an electric signal |
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Term
list four interactions as ultrasound wave travels through tissues. which of these rates is critical of ultrasound imaging? |
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Definition
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