##### Formulas and important stuff

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created 6 years ago by Annabelle
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1

Doppler Shift

FD = (2 * Vcos0 * f0)/c

2

X = D/I

...

3

Pressure

F/A

4

Volumetric flow rate formula

Flow rate = V/t

5

Poiseuille's equation

flow = pressure*diameter/ strength*viscosity

steady flow in a long straight tube

6

pressure above the heart

circulatory pressure - hydrostatic pressure

above = CP - HP

7

pressure below the heart

circulatory pressure + hydrostatic pressure

below = CP + HP

8

pressure at finger

-50 mHg

120 - 50 = 70 mHg

9

-30 mHg

120 - 30 = 90 mHg

10

pressure at the heart

-30 mHg

120 - 30 = 90 mHg

11

pressure at the knees

75 mHg

120 + 75 = 195 mHg

12

pressure at the ankles

100 mHg

120 + 100 = 220 mHg

13

Reynolds #

R# = (average flow speed * diameter * density) / viscosity

14

viscosity of blood

.035 poise

.02 - 10 poise

15

Viscosity of plasma

.01035 poise

16

Viscosity of water

.0069 poise

17

cardiac output

5000 mL/min 5 liters

5 liters circulates all around in 1 min