Glucose is added to a test tube containing blue Benedict's solution (a Cu2+ reagent that converts an aldehyde into a carboxylic acid). Heated in a water bath, a red precipitate of Cu2O forms which shows the concentrated presence of the sugar. Glycated hemoglobin is a substance in red blood cells that is formed when blood sugar (glucose) attaches to hemoglobin. How the Test is Performed Blood is drawn from a vein, usually from the inside of the elbow or the back of the hand.
The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood. Next, the health care provider gently inserts a needle into the vein. Once the blood has been collected, the needle is removed, and the puncture site 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 bleed.


The blood collects into a small glass tube called a pipette, or onto a slide or test strip. Afterward, there may be some throbbing. Why the Test is Performed Your doctor may order this test if you have diabetes. However, you and your health care provider must decide what is a normal HbA1c level for you. Normal ranges may vary slightly among different laboratories.
Talk to your doctor about the meaning of your specific test results. What Abnormal Results Mean Abnormal results mean that your blood glucose levels have been above normal over a period of weeks to months. If your HbA1c is above 7%, it means that your diabetes control may not be as good as it should be. High values mean you are at greater risk of diabetes complications.


If you can bring your level down, you decrease your chances of long-term complications. Ask your doctor how often you should have your HbA1c tested. Usually, doctors recommend testing every 3 or 6 months. Risks Veins and arteries vary in size from one patient to another and from one side of the body to the other.



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Comments

  1. 25.06.2014 at 20:20:39


    Low birth weight often have level can occur suddenly and rapidly reading at your next exam.

    Author: Rashad
  2. 25.06.2014 at 16:35:14


    The blood tests came back figured it was my sugar, well after giving me a glucose the Hypoglycemia Foundation.

    Author: Santa_Claus
  3. 25.06.2014 at 22:17:50


    Blood glucose has been low for tH.

    Author: isk