Equations

Question 1

Radiation Exposure

Answer 1

1/radius ^2 * exposure

Question 2

Shunt Fraction

Answer 2

Qs/Qt= (1-SaO2)/ (1-SVO2)

Question 3

Total Oxygen Concentration in Arterial System

Answer 3

CaO2= (1.34xHgbxSaO2) + (0.003xPaO2)

Question 4

Coronary Perfusion Pressure

Answer 4

CPP = ADP - LEDVP

Question 5

Wall Tension

Answer 5

(LEDVP x radius)/ (2x LV Wall thickness)

Question 6

Transvalvular Gradient

Answer 6

4 x peak velocity ^2

Question 7

Partial pressure of volatile agent

Answer 7

Percentage x atmospheric pressure

Question 8

FeNA

Answer 8

UNax pCr/ pNA x UCr (100%)

Question 9

Sodium Deficit

Answer 9

Women: .5 x weight (kg) x (140-serum sodium)
Men: .6 x weight (kg) x (140-serum sodium)

Question 10

PH and PaCO2 changes

Answer 10

PH decreases by .015 for each degree below 37 and CO2 decreases by 2 for every degree below 37.