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Cardiovascular > hemodynamics > Flashcards

hemodynamics Flashcards

1
Q

Capacitance vessels

A

veins - holds most of the blood

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2
Q

Total volume

A

5L

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3
Q

Flow equation

A

Q = dP/R

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4
Q

Unit Q

A

mL/min

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5
Q

Cardiac output (CO)

A

total flow in the CV system

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6
Q

Velocity

A

Q/A, highest in aorta

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7
Q

Poiseuille equation

A

Q = dP * pi * r^4/8 nl

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8
Q

flow is proportional to the __ th power of radius

A

4th

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9
Q

Rtot in parrallel is ____ than the resistance of any single vessel

A

lower

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10
Q

Parallel - changing a single vessel has ___ effect on system

A

little/low

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11
Q

Total resistance of capillary bed is ___ and is _____ of individual capillaries in parallel

A

low, independent

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12
Q

Rtot of a series of vessles is ___ than the resistance of any indivudal vessels

A

higher

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13
Q

Turbulent flow has ___ and ___

A

edies and vortices

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14
Q

Turbulent flow arrises in:

A

large diameter, high velocity, low viscosity, change in diameter, irregularity on walls

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15
Q

Turbulent flows produces ___ forces that ___ vascular endothelium

A

Shearing; Damage

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16
Q

flow is ___ in aorta

A

pulsatile

17
Q

Flow is ___ in capillaries

A

continuous

18
Q

Systolic pressure vs Diastolic pressure

A

peak/min aortic pressure

19
Q

Pulse pressure eq =

A

Psys - Pdias

20
Q

MAP = mean arterial pressure eq:

A

Pdias + 1/3 (Psys-Pdias)

21
Q

arteriosclerosis define

A

vessels lose compliance (with age)

22
Q

compliance (def/eq)

A

C = dV/dP

elastic property of vessels (absorb pulsatile flow to continuous)

23
Q

aneurysm

A

weakened wall - buldges out (higher tension)

24
Q

Laplace equation

A

T = dP r/mu (mu = wall thickness)

25
Q

Hydrostatic pressure promotes:

A

outwards - filtration

26
Q

Oncotic pressure promotes:

A

reabsorption - inward flow

27
Q

Net flux is a balance of:

A

filtrateion/reabsorption

Hydrostatic vs oncotic

28
Q

net flux eq

A 
flux = k (dP - donc)
flux= k [(Pc - Pi) - (Oncc-Onci)]

Cardiovascular (11 decks)

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