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Oncotic pressure, or colloid osmotic-pressure, is a type of osmotic pressure induced by the plasma proteins, notably albumin, [1] in a blood vessel's plasma (or any other body fluid such as blood and lymph) that causes a pull on fluid back into the capillary.
By itself, hypoalbuminemia can cause hypovolemia and circulatory collapse secondary to decreased oncotic pressure within the vascular system. [3] Due to its metal-binding properties, hypoalbuminemia may lead to nutritional deficits including zinc deficiency. [4]
Lower serum oncotic pressure causes fluid to accumulate in the interstitial tissues. Sodium and water retention aggravates the edema. This may take several forms: Puffiness around the eyes, characteristically in the morning. Pitting edema over the legs. Fluid in the pleural cavity causing pleural effusion. More commonly associated with excess ...
The most common causes of pathologic transudate include conditions that: [citation needed] Increase hydrostatic pressure in vessels: left ventricular heart failure, Decrease oncotic pressure in blood vessels: Cirrhosis (Cirrhosis leads to hypoalbuminemia and decreasing of colloid oncotic pressure in plasma that causes edema)
Liver disease can also cause hypoproteinemia by decreasing synthesis of plasma proteins like albumin. Renal disease like nephrotic syndrome can also result in hypoproteinemia because plasma proteins are lost in the urine.
The osmotic pressure of the plasma affects the mechanics of the circulation in several ways. An alteration of the osmotic pressure difference across the membrane of a blood cell causes a shift of water and a change of cell volume. The changes in shape and flexibility affect the mechanical properties of whole blood.
The most common cause of proteinuria is diabetes, and in any person with proteinuria and diabetes, the cause of the underlying proteinuria should be separated into two categories: diabetic proteinuria versus the field. [citation needed] With severe proteinuria, general hypoproteinemia can develop which results in diminished oncotic pressure.
Maintains oncotic pressure; Transports thyroid hormones; Transports other hormones, in particular, ones that are fat-soluble; Transports fatty acids ("free" fatty acids) to the liver and to myocytes for utilization of energy; Transports unconjugated bilirubin; Transports many drugs; serum albumin levels can affect the half-life of drugs ...