Imagine that your last hemoglobin A1c result was 5.9. Now it's time for a new test, and the results show that your A1c is 6.1. Does this mean your control has gotten a lot worse?
We have to remember that all these lab tests we get are subject to all kinds of errors. First, they're performed by human beings, and all human beings occasionally make mistakes.
When I was first diagnosed, my hemoglobin A1 (the old test that didn't break down into A1c) was 16. This was equivalent to an A1c of about 13. Obviously not good! I was put on metformin and given the standard dietary advice.
I drastically reduced my food intake, especially starches and sugars, went back for another test in several weeks, and then saw my doctor. He said my A1 hadn't changed. I told him that was impossible. "If it had gone from 16 to 14, I'd believe you, but it's impossible that it hasn't changed when I've changed my diet so much ( read more about dietary changes for diabetes here) . My fastings ...
I recently saw the following question:
My granddaughter’s HgbA1c was elevated to 10. Her glucose readings have been normal. Why does she have this elevated reading?
It seems obvious at first glance that either the elevated HgbA1c is wrong, or the glucose readings are misleading. I’ll assume that your granddaughter has a diagnosis of diabetes, and that the glucose readings you describe are being done by her with a home glucose meter, rather than being done in a commercial laboratory. You don’t describe her as being a child, teen, or adult, but the issues are mostly age-independent.
As you are aware, the glycosylated hemoglobin test (called by various acronyms including HgbA1c and A1C) has a normal range well below your granddaughter’s value of 10. In people without diabetes, the value is usually about 5; for people with diabetes, most endocrinologists would want to see the value below 7. So, based on her value of 10, one would assum...
HbA1c is a test that measures the amount of glycated hemoglobin in your blood. Your doctor may order this test if you have diabetes.
Glycated hemoglobin; Glycosylated hemoglobin; Hemoglobin - glycosylated; A1C; GHb; Glycohemoglobin; Diabetic control index
How the test is performed
Blood is drawn from a vein. The vein is usually on the inside of your elbow or the back of your hand. A nurse will clean the site for germs. The nurse then wraps an elastic band around the upper arm. This puts pressure on the area and makes the vein swell with blood.
Next, the needle is gently inserted into your vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm. Once the blood has been collected, the needle is removed. Then the area is covered to stop any bleeding.
In infants or young children, a sharp tool called a lancet may be used to puncture the skin and make it ble...
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