microhematocrit

noun

mi·​cro·​he·​mat·​o·​crit

variants or chiefly British microhaematocrit

-hi-ˈmat-ə-ˌkrit 

1

: a procedure for determining the ratio of the volume of packed red blood cells to the volume of whole blood by centrifuging a minute quantity of blood in a capillary tube coated with heparin

2

: a hematocrit value obtained by microhematocrit

a microhematocrit of 37 percent