actual amount of substance supplied (removed)

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Actual amount of substance supplied (removed) A = Q x ( Ca – Cv)

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Actual amount of substance supplied (removed). A = Q x ( Ca – Cv). What determines flow (Q). Q = (Pa – Pv)/R. Low vascular resistance. Q. High vascular resistance (vasoconstriction. Measurement of Q. Electromagnetic flowmeter. Doppler effect. Fick principle. Blood flow velocity. - PowerPoint PPT Presentation

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Page 1: Actual amount of substance supplied (removed)

Actual amount of substance supplied (removed)

A = Q x ( Ca – Cv)

Page 2: Actual amount of substance supplied (removed)
Page 3: Actual amount of substance supplied (removed)

What determines flow (Q)

Q = (Pa – Pv)/R

Page 4: Actual amount of substance supplied (removed)

Q

Low vascular resistance

High vascular resistance(vasoconstriction

Page 5: Actual amount of substance supplied (removed)

Measurement of Q

Page 6: Actual amount of substance supplied (removed)

Electromagnetic flowmeter

Page 7: Actual amount of substance supplied (removed)

Doppler effect

Page 8: Actual amount of substance supplied (removed)

Fick principle

Page 9: Actual amount of substance supplied (removed)

Blood flow velocity

Q=10ml/s

A= 2cm2 10cm2 1cm2

V= 5cm/s 1cm/s 10cm/s

V = Q / A

a b c

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flow

Vascular wall

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murmur

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Laminar high flow turbulent laminar

velo

city

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Resistance to blood flow

Rt = R1 + R2 + R3…………. Resistance in series

1/Rt = 1/R1 + 1/R2 + 1/R3…. Resistance in parallel

SERIES PARALLELR1 R2 R3

R1

R3R2

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x

xx

Redistribution in exercise

x

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Viskoaity ↑ při ↓↓ Q (anomalous blood viscosity)

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What determines R ?

Wall tension vasokonstriction

vasodilatation

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Pro trubici platí

Laplace

r

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Wall tension

Q

pressure pressure

Critical closingpressure

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RECRUITMENT

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exercise

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Blood pressure

Q = (Pa – Pv)/R

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systolic

diastolic

Blo

od

pre

ssu

re

(

torr

)M

ean

vel

oci

ty

c

m/s

ec

Page 25: Actual amount of substance supplied (removed)

Velocity of blood flow

Q=10ml/s

A= 2cm2 10cm2 1cm2

V= 5cm/s 1cm/s 10cm/s

V = Q / A

a b c

Page 26: Actual amount of substance supplied (removed)
Page 27: Actual amount of substance supplied (removed)

SYSTOLIC SV

elasticity of aorta

DIASTOLIC R

heart rate

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V

P

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