A patient’s hematocrit is 42 percent. Approximately what percentage of the patient’s blood is plasma?

Answer 1

Hematocrit refers to the percentage of blood volume that is made up of red blood cells. If a person has a hematocrit of 42%, then roughly the other 58% is plasma. White blood cells and platelets make up about 1% of blood volume, so the actual plasma percentage is probably closer to 57%.