Plasma Trapping in Hematocrit Determination. Differences Among Animal Species.

Abstract

Summary With the use of albumin-I¹³¹, the volume of plasma trapped in the packed cell column of hematocrit tubes was determined for blood samples obtained from 5 animal species. The volume of plasma trapped was least in blood samples obtained from elephant, man and dog (MCV 112 to 72 μ³), larger in sheep blood (MCV 37 μ³) and largest in goat blood (MCV 18 μ³). Increasing the force of centrifugation or removal of plasma proteins reduced the volume of fluid trapped in the packed cell column, and the reduction was most pronounced for goat blood.