COMPREHENSIVE TEST BANK QUESTIONS AND
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CVP = PAD = PCWP
b/c pressures are outside the heart in the pericardial space
(high pressures, but we really have a hypovolemic heart)
equalization of intracardiac pressures w/ tamponade
PVR
right ventricular afterload
20-50 joules
when using internal defib paddles directly on the heart in an open chest,
how many joules do you deliver?
,right thoracotomy
if full sternotomy needed and equipment not available, may need to
return to OR
easiest way to open chest immediately in a minimally invasive post-op pt
can cause a fire
why do you avoid defibrillating a pt on top of the ioban open chest
dressing?
2-4 days; after negative fluid balance of several liters achieved
sternal closure in an open chest pt is usually possible when?
30%
about ____% of post-op pts require blood transfusions
4 days
warfarin needs be stopped ____ days pre-op
5-7 days
plavix needs to be stopped ______ days pre-op
,4 hours before
short-acting platelet inhibitors i.e. tirofiban (aggrastat) and ebtifibatide
(integrilin) need to be stopped how long before surgery?
12-24 hours before
the long-acting plt inhibitor abciximab (ReoPro) needs to be stopped
how long before surgery?
platelets
______ given within 6 hours of stopping plavix in an emergency surgery
may be ineffective
25%
elderly pts with a hematocrit of less than ____% have worse
neurologic outcomes from being on CPB.
300u/kg
bolus dose of heparin usually given when initiating CPB
, 1-1.5mg per 100u heparin
proper protamine dose to reverse heparin in pts on CPB
some of the heparin can get metabolized during surgery
why may pts in the OR not require a full dose of protamine to
reverse heparin?
ACE inhibitors
vasoplegic shock s/p CPB is more common in pts that take
what type of antihypertensive?
2-3 days
physiologic effects of CPB can last acutely for several hours and
up to
_____ days post-op.
histamine
activation of mast cells from complement activation while on
CPB causes the release of ______________, resulting in capillary
leak, vascular smooth muscle contraction, and vasodilation.