physiology equations (FA pg 272)

Question 1

CO =

Answer 1

SV x HR

Ficks principle = rate of O2 consumption/([arterial 02] - [venous O2])

Question 2

MAP =

Answer 2

CO x TPR

Question 3

Pulse Pressure =

Answer 3

SBP - DBP

PP proportional to SV, inversely proportional to arterial pressure

Question 4

SV =

Answer 4

EDV - ESV

affected by contractility, Afterload, preload

Question 5

EF =

Answer 5

1. SV/EDV
2. (EDV - ESV)/EDV
3. normal is >54% (~66%)

Question 6

Laplace’s Law: Wall tension =

Answer 6

(pressure x radius)/(2 x wall thickness)

Question 7

1. equation showing relationship between resistance, pressure, flow.
2. Resistance =

Answer 7

1. DeltaP = Q x R

2. R = (8 x viscosity x length) / (pi x r^4)

Question 8

Total resistance of vessels in series =

Answer 8

R1 + R2 + R3 …

Question 9

Total resistance of vessels in parallel =

Answer 9

1/TR = 1/R1 + 1/R2 + 1/R3 …