Capillary hydrostatic pressure pushes fluid out of the capillary. It is formulated as Pc in the Starling equation and can be high in edema of heart failure.
Interstitial hydrostatic pressure pushes fluid into the capillary. It is formulated as Pi in the Starling equation.
Plasma oncotic pressure pulls fluid into the capillary. It is formulated as πc in the Starling equation and can be high in edema of lymphatic blockage.
Interstitial fluid oncotic pressure pulls fluid out of the capillary. It is formulated as πi in the Starling equation and can be low in edema due to liver failure, nephrotic syndrome, and protein malnutrition.
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