Friday, December 6, 2013

hypovolemia


In physiology and medicine, hypovolemia (also hypovolaemia) is a state of decreased blood volume; more specifically, decrease in volume of blood plasma. It is thus the intravascular component of volume contraction (or loss of blood volume due to things such as hemorrhaging or dehydration), but, as it also is the most essential one, hypovolemia and volume contraction are sometimes used synonymously.

Hypovolemia is characterized by salt (sodium) depletion and thus differs from dehydration, which is defined as excessive loss of body water.

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