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

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Presentation on theme: "Actual amount of substance supplied (removed) A = Q x ( Ca – Cv)"— Presentation transcript:

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

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3 What determines flow (Q) Q = (Pa – Pv)/R

4 Q Low vascular resistance High vascular resistance (vasoconstriction

5 Measurement of Q

6 Electromagnetic flowmeter

7 Doppler effect

8 Fick principle

9 Blood flow velocity Q=10ml/s A= 2cm 2 10cm 2 1cm 2 V= 5cm/s 1cm/s 10cm/s V = Q / A abc

10 flow Vascular wall

11 murmur

12 Laminar high flow turbulent laminar velocity

13 Resistance to blood flow Rt = R1 + R2 + R3…………. Resistance in series 1/Rt = 1/R1 + 1/R2 + 1/R3…. Resistance in parallel SERIES PARALLEL R1R2R3 R1 R3 R2

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15 x x x Redistribution in exercise x

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17 Viskoaity ↑ při ↓↓ Q (anomalous blood viscosity)

18 What determines R ? Wall tension vasokonstriction vasodilatation

19 Pro trubici platí Laplace r

20 Wall tension Q pressure Critical closing pressure

21 RECRUITMENT

22 exercise

23 Blood pressure Q = (Pa – Pv)/R

24 systolic diastolic Blood pressure (torr) Mean velocity cm/sec

25 Velocity of blood flow Q=10ml/s A= 2cm 2 10cm 2 1cm 2 V= 5cm/s 1cm/s 10cm/s V = Q / A abc

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27 SYSTOLIC SV elasticity of aorta DIASTOLICR heart rate

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30 V P

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