# Operative Neurosurgery

plasma

## Blood plasma

Blood plasma the yellow-colored liquid component of blood, in which blood cells are suspended.

Hypovolemia (also hypovolaemia or oligemia) 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 bleeding or dehydration), but, as it also is the most essential one, hypovolemia and volume contraction are sometimes used synonymously.

see Plasma cell