mock exam 7

Question 1

the pressure inside a low pressure high volume ETT cuff is 25mmHg. is the cuff pressure too high

Answer 1

cuff pressure is too high and can induce mucosal damage
have to convert to cmH2O
25mmHg x 1.36cmH2O/mmHg = 34cmH2O
(normal cuff pressure is <25 cmH2O)

Question 2

what does acute alcohol intoxication do in terms of GABA-A and NMDA receptors

Answer 2

agonizes GABA A receptors (decreases MAC) and antagonized NMDA

Question 3

is acute alcohol intoxication associated with emergence delirium

Answer 3

no

Question 4

which one represents the beta waveform associated with stage 2 anesthesia

Answer 4

Question 5

what is secreted via adrenal cortex

Answer 5

aldosterone
androgens

Question 6

what is secreted via zona glomerulosa, fasciculata, retirularis

Answer 6

salt, sugar, sex!
glomerulosa-aldosterone
fasciculata-glucocorticouds
reticularis-androgens

Question 7

risk factors for pulmonary complications in the elderly following GA

Answer 7

slow recovery of upper aw tone
CNS response to hyperCARBIA attenuated
PNS response to hypoxia attenuated
atelectasis due to hypoventilation and VQ mismatch

Question 8

what does the carotid sheath contain

Answer 8

common carotid
internal carotid
IJ vein
vagus nerve

Question 9

how much does skin impedance increase current required to cause vfib compared with a micro shock

Answer 9

occurs via macro shock at 100mA and only takes 100 micro amps or .1mA
there is a 1000 fold difference

Question 10

do obese people have more plasma cholinesterase

Answer 10

yeah apparently so.

Question 11

can anemia reduce bloods ability to buffer volatile acids

Answer 11

yes because it reduces bloods’ ability to buffer CO2

Question 12

what constituent is higher in CSF than it is in the plasma?

Answer 12

CO2
less protein in CSF which means less ability to buffer H+, higher amount of dissolved CO2 and decreased pH results

Question 13

what is the fraction of sevoflurane leaving the vaporizing chamber of a variable bypass vaporizer at sea level?

Answer 13

21%
(157/760)

Question 14

what mechanical events occur between S1 and S2 heart sounds

Answer 14

isovolumetric contraction
ejection

Question 15

which BB has LA properties

Answer 15

propanolol

Question 16

signs of excess glucocorticoid secretion include

Answer 16

osteoporosis, muscle weakness, hyperglycemia, weight gain, mood changes, higher risk of infection

Question 17

signs of excess mineralocorticoid secretion include

Answer 17

HTN, Hokalemia, metabolic alkalosis

Question 18

peak of morphine and heroin withdrawal

Answer 18

36-72h

Question 19

onset of morphine and heroin withdrawal

Answer 19

6-18h

Question 20

which 3 systemic conditions are common for both RA and SLE

Answer 20

restrictive lung disease
peripheral neuropathy
anemia

Question 21

what does FFP contain

Answer 21

protein, coagulation factors, fibrinogen

Question 22

when is FFP indicated

Answer 22

inherited factor deficiencies
PRBC transfusion of greater than 1 BV
DIC with clinical bleeding
heparin resistance d/t antithrombin deficiency
acute reversal of warfarin
liver dysfunction
tx of hereditary angioedema

Question 23

use the data set to figure out how long it will take to exhaust O2 supply in the FRC of the following Female patient
height: 1.65m
weight: 130kg
FiO2 1.0
O2 consumption 375mL/min

Answer 23

FRC is 35mL/kg IBW
height 165cm-105cm=60kg IBW
obese: 50% reduction in FRC
2100x.5=1,050

1,050/375=2.8m

Question 24

what can increase mixed venous O2 sats (aka increase SvO2)

Answer 24

conditions that increase O2 delivery
or decrease O2 consumption

Question 25

which nerve is associated with foot drpo

Answer 25

sciaitic

Question 26

what are the primary determinants of end systolic volume

Answer 26

outflow impedance aka afterload
ventricular contractility

Question 27

which irrigation mixture can create electrocution with unipolar electrocautery

Answer 27

NaCl .9%