Cardio12 Flashcards
Capillary Fluid Exchange
What type of forces determine fluid movement through capillary membrane?
Starling forces
Pc = capillary pressure -
Pushes fluid OUT of capillary
Pi = Interstitial fluid pressure -
Pushes fluid INTO capillary
pi(c) = plama colloid osmotic pressure -
Pulls fluid INTO capillary
pi (i) = Interstitial fluid colloid osmotic pressure -
Pulls fluid out of capillary
Net flitration pressue (Pnet) =
[(Pc - Pi) - (pi (c) - pi (i))]
Kf =
filtration constant (capillary permeability)
Net fluid flow (Jv) =
(Kf)(Pnet)
Edema is commonly caused by what?
INcreased capillary pressure (Pc)
DEcreased plama proteins (pi (c))
INcreased capillary permeability (Kf)
INcreased interstitial colloid osmotic pressure
INcreased capillary pressure is associated with?
Heart failure
DEcreased plama proteins is associated with?
Nephrotic syndrome
Liver failure
INcreased capillary permeability is associated with?
Toxins
Infections
Burns
INcreased interstitial colloid osmotic pressure is associated with?
Lymphatic blockage