Formulas

Question 1

Compliance

Answer 1

delta V/delta P

Question 2

Volume of Distribution

Answer 2

bolus dose/[serum]

Question 3

MAP

Answer 3

CO x SVR

2/3 DBP + 1/3 SBP

Question 4

CO

Answer 4

HR X SV

Question 5

CI

Answer 5

CO / BSA

Question 6

Ejection Fraction

Answer 6

EDV - ESV / EDV

Question 7

Coronary Perfusion Pressure

Answer 7

Aortic DP - LVEDP

Question 8

SVR

Answer 8

80 x (MAP - CVP)/CO

Question 9

PVR

Answer 9

80 x (mPAP - LAP)/CO

Question 10

LaPlace’s Law

Answer 10

Stress = P x r /2H

Question 11

Fick CO Equation

Answer 11

VO2 / (CaO2-CvO2)

Question 12

Oxygen Content

Answer 12

(Hgb x 1.31 x SaO2) x (PaO2 x0.003)

Question 13

Delivery of Oxygen (DO2)

Answer 13

CaO2 x CO

Question 14

Valve Area –> Bernoulli Equation

Answer 14

delta P = 4V^2

Question 15

Flow

Answer 15

pressure gradient/ resistance

Question 16

Poiseuille’s Law

Answer 16

Resistance = 8 x L x Viscosity / (pi)R^4

Question 17

Reynold’s Number

Answer 17

velocity x diameter x density / viscosity

Question 18

Bohr Equation for Deadspace

Answer 18

Vd/Vt = PaCO2 - EtCO2/PaCO2

Question 19

Alveolar Gas Equation

Answer 19

PAO2 = PiO2 - PaCO2/Rq

Question 20

Cerebral Perfusion Pressure

Answer 20

CPP = MAP - ICP

Question 21

Boyle’s Law

Answer 21

P1V1 - P2V2 (venturi effect)

Question 22

Gay-Lussac’s Law

Answer 22

P1/T1 = P2T2

Question 23

Charles Law

Answer 23

V1/T1 = V2/T2

Question 24

Max Allowable Blood Loss

Answer 24

(Hcti - Hct f)/(Hcti) x (EBV)