R9 Flashcards
Average FRC (RV + ERV) equation
30ml/kg
greatest decrease in FRC occurs when going from
60 degrees to supine
NO change from 0 to -30
considerable change after -30
how is FRC related to height, gender and weight?
directly proportional to height, indirectly proportional to weight. reduced 10% in females as compared to males
PT/INR most closely correlate with which factor levels?
7a
inital bolus dose of precedex on CO, HR, BP
decrease, decrease, increase
peak hypertensive response 3 min after bolus. biphasic because stimulates peripheral (vasoconstrict) and then central (reduce sympathetic tone)
how to maximize flow rate?
most important is radius. then high pressure, low viscosity, and short tubing.
to change flow from turbulent to laminar, reduce density (per reynolds number)
potency of an inhalational anesthetic gas can be estimated by knowing it’s solubility in what?
olive oil
(#1 xenon, krypton, argon)
formed the meyer-overton correlation
vanc admin should not exceed what and why
10mg/min -> risk of red man syndrome
why do infants have a higher initial uptake of volatile?
increased MV to FRC ratio
they also have a higher cardiac output on a per kilo basis to adults
opiate options in ESRD
fentanyl, methadone, remifentanil
how does desflurane decrease BP?
primary by decreasing afterload.
also increases HR and has dose-dependent depression of myocardial function.
maintains CO
static compliance variables / equation
Cs = Vt / (Plateau pressure - PEEP)
for dynamic, replace plateau with Peak
two primary inhibitory neurotransmitters
GABA (works centrally) and glycine (works at spinal level)
what anesthetic gas most significantly augments NMB?
desflurane (60%)
direct: relax skeletal muscles
indirect:
sevo/iso (40%)
NO (20%)
diagnoses with large R wave in V1
Wolf Parkinson White RVH Posterior wall MI muscular dystrophy right atrial enlargement right ventricular strain
