Equations

Question 1

Compliance

Answer 1

C= ΔV / ΔP

Question 2

Cardiac output

Answer 2

CO=SVxHR

Question 3

Stroke volume

Answer 3

SV=EDV-ESV

EDV= end diastolic volume
ESV= end systolic volume

Question 4

Mean arterial pressure

Answer 4

MAP= DP + 1/3(SP-DP)

Question 5

Pulse pressure

Answer 5

PP=SP-DP

SP= systolic pressure
DP= diastolic pressure

Question 6

Blood pressure

Answer 6

BP=CO x VR

VR= vascular resistance

Question 7

Poiseuille’s equation

Answer 7

Q=r^4

Question 8

Ohm’s law

Answer 8

F=ΔP/R

Question 9

Nernst equation

Answer 9

E=60log(conc outside/conc inside)

Answer 10

Poiseuille’s law: R = 8ƞl / πr^4.

ƞ = viscosity, l = length

Question 11

Alveolar gas equation

Answer 11

PAO2= PiO2 - (PaCO2/R)

Question 12

Dalton’s law

Answer 12

In a mixture of non reacting gases Ptotal = Pa + Pb.
P= total is the sum of the pressures of individual gases

Question 13

Boyle’s law

Answer 13

Pressure and Volume are inversely proportional:

P1V1 = P2V2

Question 14

Henry’s law

Answer 14

The solubility of a gas is proportional to the partial pressure of the gas. S1/P1 = S2/P2.

Question 15

Acid base dissociation equation

Answer 15

CO2 + H2O = H2CO3 = HCO3- + H+

Question 16

henderson hasselbach equation

Answer 16

pH = pKa + log (A-)/(HA)

Question 17

Laplace’s law

Answer 17

P = 2T/R

Question 18

Total lung capacity equations

Answer 18

TLC = VC + RV