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I = E / R

I = E / R. Q= P / R. VELOCITA’ DEL SANGUE. V= Q /A. Q= Flusso V=Velocità A= Area sezione trasversale. 1000. 3 cm 2. Calcolo della velocià del sangue se Q=5000 ml/min (5000 ml/60 sec= 83 ml/sec) Area aorta= 3 cm 2 Vaorta =83/3= 28 cm/sec Se Q=4Q allora V=4V (28 x 4=  100 cm/sec)

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I = E / R

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  1. I = E / R Q= P / R

  2. VELOCITA’ DEL SANGUE V= Q /A Q= Flusso V=Velocità A= Area sezione trasversale

  3. 1000 3 cm2 Calcolo della velocià del sangue se Q=5000 ml/min (5000 ml/60 sec= 83 ml/sec) Area aorta= 3 cm2 Vaorta=83/3= 28 cm/sec Se Q=4Q allora V=4V (28 x 4= 100 cm/sec) Area capillari=1000 x A aorta Vcapillari=28/1000=0.028 cm/sec

  4. Jean-Leonard-Marie Poiseuille(1799-1869).

  5. si riduce del 50% P Q  P1-P2 (P) l Q  1/l r Q  r4  Q  1/ P1 P2 r l

  6. P1 P2 r l (P1-P2)  r4 Q = 8l

  7. Applicazione della legge per la valutazione della resistenza

  8. Aorta90 mm Hg Atrio Dx 0 mm Hg Atrio Sin 6 mm Hg Art. Polm.15 mm Hg

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