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Plasma Colloid Oncotic Pressure (PCOP)

Target: PCOP
Molecular classification: Physiological property

Overview

Plasma colloid oncotic pressure is the osmotic pressure generated by plasma proteins, primarily albumin, in the blood. This force pulls water into the circulatory system, counterbalancing hydrostatic pressure and maintaining fluid balance between blood vessels and interstitial spaces. Reduced oncotic pressure, often due to hypoalbuminemia, can lead to edema. It is a critical parameter in fluid management, especially in critically ill patients.

Other names: Oncotic pressureColloid osmotic pressure

Mechanism of action

Influenced by drugs that affect plasma protein concentration, such as albumin infusions which increase oncotic pressure.

Biological functions

Fluid balance regulationMaintenance of vascular volumeRegulation of fluid exchange between blood vessels and interstitial spaces

Disease associations

Edema (contributing factor)Hypovolemia (contributing factor)Ascites (contributing factor)

Safety considerations

Fluid overload with excessive colloid administrationAllergic reactions to albuminImpact on kidney function with impaired albumin metabolism

Interacting drugs

Human serum albumin (HSA)

1 more in the full profile.

Biomarkers

Serum albumin levels

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