Equations

Question 1

Nitrogen Balance

Answer 1

Protein intake / 6.25 - (Urin Nitrogen + 4)

Question 2

Cerebral perfusion pressure (CPP)

Answer 2

CPP = MAP - ICP

goal CPP: 60-70
goal ICP <20

Question 3

Oxygen delivery (DO2)

Answer 3

CO x [(Hg + SaO2 + 1.34) + (PaO2 x 0.003)]

Question 4

Mean arterial pressure (MAP)

Answer 4

CO x SVR

Question 5

Cardiac index (CI)

Answer 5

Cardiac output (CO) / Body surface area (BSA)

Question 6

Ejection fraction (EF)

Answer 6

Stroke volume (SV) / LVEDV

Question 7

Minute ventilation (MV)

Answer 7

Tidal volume (TV) x RR

Question 8

Fractional excretion of sodium (FeNa)

Answer 8

(Ur na/Ur cr) / (plasma na/plasma cr)

Question 9

hepatic venous pressure gradient (portal pressure)

Answer 9

IVC pressure - portal vein pressure

normal: <5mmHg