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12 Cards in this Set

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  • Back
how does the supine position affect the respiratory system?
decreases FRC by 25-30%
NM blockers can further reduce FRC
Adverse effects may be offset by mechanical ventilation
what is the maximum angle armboards and arms should be in the supine position? what is the desirable angle?
<90degrees (max)
60 degrees (optimal)
how should you place the patient's palms when the pt is in the supine position? why?
palms up (supination)
relieves pressure on the ulnar nerve as it passes through the humeral notch at the elbow

caveat: some providers advocate pronation, saying that supination may increase stretch on the brachial plexus
what nerve can be injured by the anesthetist's fingers on the patient's mandible during masking?
facial nerve
cardiac considerations of supine position?
minimal effects on circulation
cardiac considerations of prone position?
pooling of blood in extremities
compression of abd. muscles (pt should have TEDS/SCDs)
pooling can --> decr preload, decr CO, decr BP
incr SVR and PVR
respiratory considerations of prone position?
decreased lung compliance
increased peak airway pressures
increased WOB
ETT dislodgement/extubation
thoracic outlet syndrome is associated with what nerve? what position does this usually happen with?
thoracic nerve (compression)
"Superman" arm position while prone
cardiac considerations with Trendelenburg?
activation of baroreceptors --> decr in CO, PVR, HR, and BP
research suggests t-burg does not improve CO in hypotension and hypovolemia
respiratory considerations with Trendelenburg?
decr FRC, decr TLC, decr lung compliance (r/t shift of abdominal viscera)
increased V/Q mismatching
atelectasis
incr likelihood of aspiration
Respiratory considerations with reverse t-burg?
decr WOB
incr FRC
Cardiac considerations with reverse t-burg?
decr CO, decr preload, decr BP
baroreceptor reflexes incr SNS tone, HR, PVR