Colloid-Oncotic Pressure (COP) is expressed in mmHg, and refers to plasma.

Normal Values:

	PRESSURES	plasma	venous	interstitial
	Oncotic	25 ± 2	26 ± 2	15–20
		arterial	venous	tissue
	Hydrostatic	30 ± 5	10 – 15	0 – 2