Since red blood cells live about an average of three months, the A1c test will reflect those red blood cells that are present in the bloodstream at the time of the test this is why the A1c serves as an average of blood sugar control. In fact, hemoglobin is what gives blood its bright red coloring. Hemoglobin is a protein only found in red blood cells. The test can also be used to diagnose diabetes. The test shows an average of the blood sugar level over the past 90 days and represents a percentage. If your score is less than 70%, you can return to this section and review the information.The hemoglobin A1c (glycated hemoglobin, glycosylated hemoglobin, HbA1c, or A1c) test is used to evaluate a person's level of glucose control. If your score is over 70% correct, you are doing very well. At the end of the quiz, your score will display. Please choose the single best answer to each question. To find out how much you have learned about Monitoring Your Diabetes, take our self assessment quiz when you have completed this section. Self assessment quizzes are available for topics covered in this website. The fructosamine test reflects the average blood sugars only over a 2-3 week period. Unfortunately, the fructosamine test and the A1c are not interchangeable because they are measuring different things. An alternative test to the A1c is a fructosamine test. If your finger-stick blood tests give an average blood sugar that is much higher or lower than your A1c test, ask your doctor if the A1c is the right test for you. For example, if someone has certain type of hemoglobin mutations (variation in the hemoglobin structure), is severely anemic (low red blood cell count), iron deficient or is being treated blood transfusions or medications to increase the production of new red blood cells, the A1c test may not be accurate. Use this chart to view A1c values and comparable blood glucose values: A1cĪ note of caution: the A1c measurement is not always accurate.
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