Hematocrit

This is the percentage of the total blood volume that is made up of the red blood cells. This is a test in which the blood is put into a small tube and then into a centrifuge that spins it to separate the red blood cells from the other portion of the blood. It will allow your caregiver to compare the percentage of red blood cells to the whole blood product. The hematocrit will be decreased in different types of anemia.

PREPARATION FOR TEST

No preparation or fasting is necessary.

NORMAL FINDINGS

  • Male: 42%-52% or 0.42-0.52 volume fraction (SI units)

  • Female: 37%-47% or 0.37-0.47 volume fraction (SI units)

  • Pregnant female: greater than 33%

  • Elderly: values may be slightly decreased

  • Child/Adolescent:

  • Newborn: 44% to 64%

  • 2-8 weeks: 39% to 59%

  • 2-6 months: 35% to 50%

  • 6 months – 1 year: 29% to 43%

  • 1-6 years: 30% to 40%

  • 6-18 years: 32% to 44%

Ranges for normal findings may vary among different laboratories and/or hospitals. You should always check with your doctor after having lab work or other tests done to discuss the meaning of your test results and whether your values are considered within normal limits.

MEANING OF TEST

Your caregiver will go over the test results with you and discuss the importance and meaning of your results, as well as treatment options and the need for additional tests if necessary.

OBTAINING THE TEST RESULTS

It is your responsibility to obtain your test results. Ask the lab or department performing the test when and how you will get your results.