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Major Physiology Equations and Factoids
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Blood Flow/Airflow (Q)
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Q = DeltaP/R
DeltaP = Pressure gradient
R = Resistance
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Terms in this set (53)
Blood Flow/Airflow (Q)
Q = DeltaP/R
DeltaP = Pressure gradient
R = Resistance
Translate Flow equation to Equation for Cardiac Output
CO = (MAP + RAP)/TPR
Cardiac Output = (Mean Arterial Pressure - Right Atrial Pressure)/(total peripheral resistance)
Velocity of Flow
v = Q/A
Q = Flow
A = Cross Sectional Area
Pouseuilles Law for Resistance
R = 8
(viscosity)
L/(pi*radius^4)
L = Length
Thus vessel RADIUS is most important determinant of resistance. Decrease in radius by 2 --> increases resistance by a factor a 16 and thus decreases flow by a factor of 16 (Q = deltaP/R)
Resistance in Parallel vs Series
- Addition of additional units decreases total Resistance for which?
- 1/R(parallel) = 1/R1 + 1/R2 + ...
- R (series) = R1 + R2 + R2
Addition of units arranged in parallel (organs or collateral artery addition) reduces total resistance.