Overview

A hematocrit (he-MAT-uh-krit) test measures the proportion of red blood cells in your blood. Red blood cells carry oxygen throughout your body. Having too few or too many red blood cells can be a sign of certain diseases.

The hematocrit test, also known as a packed-cell volume (PCV) test, is a simple blood test.

May 26, 2016
References
  1. Sandoval C. Approach to the child with anemia. http://www.uptodate.com/home. Accessed March 24, 2016.
  2. Schrier SL. Approach to the adult patient with anemia. http://www.uptodate.com/home. Accessed March 24, 2016.
  3. Types of blood tests. National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/bdt/types. Accessed March 24, 2016.
  4. Tefferi A. Diagnostic approach to the patient with polycythemia. http://www.uptodate.com/home. Accessed March 24, 2016.
  5. Hoffman R, et al. The polycythemias. In: Hematology: Basic Principles and Practice. 6th ed. Philadelphia, Pa.: Saunders Elsevier; 2013. http://www.clinicalkey.com. Accessed March 24, 2016.
  6. CBC with differential, blood. Mayo Medical Laboratories. http://www.mayomedicallaboratories.com/test-catalog/Clinical+and+Interpretive/9109. Accessed March 24, 2016.