how to calculate net filtration pressure of capillary? and venous end? Capillary hydrostatic pressure at arterial end 35 mmHg Plasma colloid osmotic pressure 15 mmHg Interstitial fluid hydrostatic pressure 1 mmHg Interstitial fluid osmotic pressure 3 mmHg is the net filtration pressure greater at the arterial end of the capillary than the venous end or is it equal?