Normal hematocrit levels vary based on age and race.. A hematocrit level below the normal range, meaning the person has too few red blood cells, is called anemia. A hematocrit level above the normal range, meaning too many red blood cells, may indicate polycythemia or erythrocytosis. Your doctor may test your hematocrit levels if you show signs of having anemia, polycythemia or erythrocytosis.
Symptoms of anemia include fatigue, shortness of breath and dizziness. Symptoms of polycythemia include fatigue, itching, headaches, and sweating.
Symptoms of erythrocytosis includes headaches, dizziness, shortness of breath, and nosebleeds. Hematocrit and hemoglobin measurements are both blood tests but they are not testing the same thing. Hemoglobin is checked before each blood donation. Your doctor may want to repeat the hematocrit test and do other blood tests if results provide conflicting or unexpected information. Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. This content does not have an English version.
This content does not have an Arabic version. Sections for Hematocrit test About. Overview A hematocrit he-MAT-uh-krit test measures the proportion of red blood cells in your blood. The hematocrit test, also known as a packed-cell volume PCV test, is a simple blood test. More Information Iron deficiency anemia. Request an Appointment at Mayo Clinic. Share on: Facebook Twitter. Show references Sandoval C. Approach to the child with anemia.
Accessed March 24, Schrier SL. You may have slight pain or bruising at the spot where the needle was put in, but most symptoms go away quickly. If your results are not in the normal range, it doesn't necessarily mean that you have a medical condition requiring treatment. To learn more about your results, talk to your health care provider.
Learn more about laboratory tests, reference ranges, and understanding results. Many factors can affect your hematocrit levels, including a recent blood transfusion, pregnancy , or living at a high altitude. The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health. Hematocrit Test. What is a hematocrit test? What is it used for? Why do I need a hematocrit test? What happens during a hematocrit test?
Will I need to do anything to prepare for the test? Are there any risks to the test? What do the results mean? If test results show your hematocrit levels are too low, it may indicate: Anemia Nutritional deficiency of iron, vitamin B, or folate Kidney disease A bone marrow disease Certain cancers such as leukemia , lymphoma , or multiple myeloma If test results show your hematocrit levels are too high, it may indicate: Dehydration, the most common cause of high hematocrit levels.
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