Hemoglobin Electrophoresis

This is a blood test that identifies abnormal forms of hemoglobin (the oxygen-carrying part of the red blood cells) present in blood. This test determines the different forms of hemoglobin and whether they are normal. It can also look at different types of abnormal hemoglobin that are causes of anemia. Examples are thalassemia or sickle cell anemia.

PREPARATION FOR TEST

No preparation or fasting is necessary.

NORMAL FINDINGS

Adult/elderly: percentage of total hemoglobin

  • Hgb A1: 95% to 98%

  • Hgb A2: 2% to 3%

  • Hgb F: 0.8% to 2%

  • Hgb S: 0%

  • Hgb C: 0%

Children: Hgb F

  • Newborn: 50% to 80%

  • Less than 6 months: less than 8%

  • Greater than 6 months: 1% to 2%

Ranges for normal findings may vary among different laboratories and 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.