PSL301: Cardio 8 Flashcards
Pc
capillary hydrostatic pressure
Pif
interstitial fluid pressure
(pi)c
plasma colloid osmotic pressure
(pi)if
Interstitial fluid colloid pressure
Define: Pc
move fluid out
due to fluid pressure in blood
Define: Pif
move fluid in
Opposes outward movement of Pc
due to fluid pressure in ISF
Define: (pi)c
Move fluid in
if proteins in blood > proteins in ISF
Define: (pi)if
Move fluid out
if proteins in ISF > proteins in blood
Formula: net fluid pressure (at capillaries)
Fluid out - fluid in
[Pc + (pi)if] - [Pif + (pi)c]
Value: Pif
why?
- 3 mmHg
Lymphatic system remove fluid
Value: Pc
45 to 10 mmHg
Value: (pi)if
why?
8 mmHg
Lympathic system remove proteins
Value: (pi)c
28 mmHg
Value: plasma protein concentration
7.3 mg/dl
What makes up the plasma proteins?
75% albumin
25% globulin
Very little fibrinogen
Value: interstitial protein concentration
3 mg/dl
If net fluid pressure is positive…
More fluid going out of vessel
If net fluid pressure is negative…
More fluid going into vessel
Due to the gradient from Pc, __L of net flow outward per day
3L
Forces that push fluid out of vessels
- Hydrostatic pressure
- Pressure from LACK OF fluid in ISF
- Interstitial colloid osmotic pressure
Forces that push fluid into vessels
- plasma colloid osmotic pressure
Value: mean hydrostatic pressure
17.3 mmHg
Value: filtration coefficient
10 mL/min/mmHg
Formula: filtration rate
filtration coefficient * net filtration pressure
