hemodinamica Flashcards

1
Q

diámetro vascular de:
- aorta
- Pequeñas arteriolas
- Arteriolas
- Capilares
- venulas
- pequeñas venas
- venas cava

A
  • aorta : 25mm
  • Pequeñas arteriolas: 4mm
  • Arteriolas: 10-30µm
  • Capilares: 5-8µm
  • venulas: 20µm
  • pequeñas venas: 5mm
  • venas cava:30mm
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2
Q

Área de sección de:
- aorta
- Pequeñas arteriolas
- Arteriolas
- Capilares
- venulas
- pequeñas venas
- venas cava

A
  • aorta: 2,5cm2
  • Pequeñas arteriolas: 20cm2
  • Arteriolas: 40cm2
  • Capilares: 2500cm2
  • venulas:250cm2
  • pequeñas venas: 80cm2
  • venas cava: 8cm2
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3
Q

relacion flujo, volumen y area

A

Q= A x V

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4
Q

relacion pascales y mmHg

A

1 mmHg=133Pa

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5
Q

formula de la presion

A

P= F/A

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6
Q

como calculamos el flujo

A

presión arterial media- presión venosa central

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7
Q

relacion flujo, presion y resistencia

A

Q= P/R

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8
Q

cuacion de reynolds

A

Re= v.d.ρ/ n
v=velocidad
d=diamero
ρ= densidad
n= viscosidad

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9
Q

formula de la conductancia

A

inversa de la resistencia
c= r^4 x 𝛑/ n.l.8

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10
Q

formula distensibilidad

A

D= variaion volumen/ variacion de presiones x volumen inicial

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11
Q

diferencia de distensibilidad entre vensa y arterias

A

venas 8 veces mas distensibles

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12
Q

formula de cpacitancia

A

c= variacion de volumen/variacion de presion

c= distensibilidad x volumen inicial

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13
Q

diferencia de capacitancia entre vens y arterias

A

las venas24 veces mas

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