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What is A1C Test? Is it an Accurate Blood Test? – roomroom.infoAc vs blood glucose -
Conditions that change the life span of red blood cells, such as recent blood loss, sickle cell disease , erythropoietin treatment, hemodialysis , or transfusion, can change A1C levels.
A falsely high A1C result can occur in people who are very low in iron; for example, those with iron-deficiency anemia. Other causes of false A1C results include kidney failure or liver disease. People in these groups may have a different type of hemoglobin, known as a hemoglobin variant, which can interfere with some A1C tests.
Most people with a hemoglobin variant have no symptoms and may not know that they carry this type of hemoglobin. Not all A1C tests are unreliable for people with a hemoglobin variant. People with false results from one type of A1C test may need a different type of A1C test to measure their average blood glucose level.
The NGSP provides information for health care professionals about which A1C tests are appropriate to use for specific hemoglobin variants. Read about diabetes blood tests for people of African, Mediterranean, or Southeast Asian descent. Even when the same blood sample is repeatedly measured in the same lab, the results may vary because of small changes in temperature, equipment, or sample handling.
These factors tend to affect glucose measurements—fasting and OGTT—more than the A1C test. Health care professionals understand these variations and repeat lab tests for confirmation.
Diabetes develops over time, so even with variations in test results, health care professionals can tell when overall blood glucose levels are becoming too high.
When repeated, the A1C test result can be slightly higher or lower than the first measurement. This means, for example, an A1C reported as 6. Health care professionals can visit ngsp.
org to find information about the precision of the A1C test used by their lab. Your health care professional may use the A1C test to set your treatment goals, modify therapy, and monitor your diabetes management. Experts recommend that people with diabetes have an A1C test at least twice a year.
People will have different A1C targets, depending on their diabetes history and their general health. You should discuss your A1C target with your health care professional. Studies have shown that some people with diabetes can reduce the risk of diabetes complications by keeping A1C levels below 7 percent.
Managing blood glucose early in the course of diabetes may provide benefits for many years to come. However, an A1C level that is safe for one person may not be safe for another. For example, keeping an A1C level below 7 percent may not be safe if it leads to problems with hypoglycemia , also called low blood glucose.
Less strict blood glucose control, or an A1C between 7 and 8 percent—or even higher in some circumstances—may be appropriate in people who have. Estimated average glucose eAG is calculated from your A1C.
Some laboratories report eAG with A1C test results. The eAG number helps you relate your A1C to daily glucose monitoring levels. Even though A1C results represent a long-term average, blood glucose levels within the past 30 days have a greater effect on the A1C reading than those in previous months.
The National Institute of Diabetes and Digestive and Kidney Diseases NIDDK and other components of the National Institutes of Health NIH conduct and support research into many diseases and conditions. Clinical trials are part of clinical research and at the heart of all medical advances.
Clinical trials look at new ways to prevent, detect, or treat disease. Scientists are conducting research to learn more about diabetes, including studies about A1C.
For example. Researchers also use clinical trials to look at other aspects of care, such as improving the quality of life for people with chronic illnesses. How well do you score on brain health? Shining light on night blindness. Can watching sports be bad for your health?
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As a result, glucose can't get into your cells, so your blood sugar levels increase. Glucose in your blood sticks to hemoglobin, a protein in your red blood cells.
As your blood glucose levels increase, more of your hemoglobin will be coated with glucose. An A1C test measures the percentage of your red blood cells that have glucose-coated hemoglobin.
High A1C levels are a sign of high blood glucose from diabetes. Diabetes can cause serious health problems , including heart disease , kidney disease , and nerve damage. But with treatment and lifestyle changes, you can control your blood glucose levels.
An A1C test may be used to screen fo r or diagnose:. If you have diabetes or prediabetes, an A1C test can help monitor your condition and check how well you've been able to control your blood sugar levels. A health care professional will take a blood sample from a vein in your arm, using a small needle.
After the needle is inserted, a small amount of blood will be collected into a test tube or vial. You may feel a little sting when the needle goes in or out.
This usually takes less than five minutes. There is very little risk to having a blood test. You may have slight pain or bruising at the spot where the needle was put in, but most symptoms go away quickly. A1C results tell you what percentage of your hemoglobin is coated with glucose.
The percent ranges are just a guide to what is normal. What's normal for you depends on your health, age, and other factors. Ask your provider what A1C percentage is healthy for you.
Providers often use more than one test to diagnose diabetes. So, if your test result was higher than normal, you may have another A1C test or a different type of diabetes test , usually either a fasting blood glucose test or an oral glucose tolerance test OGTT.
If your A1C test was done to monitor your diabetes, talk with your provider about what your test results mean. Learn more about laboratory tests, reference ranges, and understanding results. The A1C test is not used to diagnose gestational diabetes or type 1 diabetes.
Also, if you have a condition that affects your red blood cells, such as anemia or another type of blood disorder , an A1C test may not be accurate for diagnosing diabetes. Kidney failure and liver disease can also affect A1C results.
In these cases, your provider may recommend different tests to diagnose diabetes and prediabetes. The information on this site should not be used as a substitute for professional medical care or advice.
Contact a health care provider if you have questions about your health. Hemoglobin A1C HbA1c Test. What is a hemoglobin A1C HbA1C test? An A1C test can show your average glucose level for the past three months because: Glucose sticks to hemoglobin for as long as the red blood cells are alive.
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