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Suggest Medical Tests To Rule Out Pre-diabetes

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Posted on Sat, 27 Feb 2016
Question: Hi, My girl friend got a report back from the doctor saying she we prediabetic. I am not sure she fasted before the blood work and given her exercise routine, she is a fitness teacher and is 5-4 119 and eats very well can a report mis calculate her results?
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Answered by Dr. Shehzad Topiwala (1 hour later)
Brief Answer:
Depends

Detailed Answer:
Whether or not your girl friend truly has Pre Diabetes depends on the type of test utilized to make that diagnosis. The best test is the Oral Glucose Tolerance Test (OGTT) which entails 8 hours of overnight fasting. The alternative test called HbA1c is more convenient but has some limitations.
If she was told to have Pre diabetes based on the A1c, it would be worthwhile to undergo the OGTT to confirm this fact or otherwise.

OGTT PROTOCOL FOR NON PREGNANT ADULTS TO SCREEN FOR DIABETES


1 OGTT = ORAL GLUCOSE TOLERANCE TEST

2 PLEASE FAST OVERNIGHT FOR 8 TO 14 HOURS

3 IT IS ALL RIGHT TO DRINK WATER AND TAKE ALL/ANY OF YOUR PILLS BEFORE THE TEST IN THE MORNING

4 DO NOT RESTRICT YOUR USUAL DIETARY CARBOHYDRATE INTAKE DURING THE 3 DAYS PRECEDING THE TEST.

5 AFTER THE FIRST BLOOD SAMPLE IS TAKEN FOR BLOOD GLUCOSE AT 0 HOURS, YOU WILL BE OFFERED A GLUCOSE DRINK THAT CONTAINS 75 GRAMS OF GLUCOSE IN WATER. PLEASE DRINK THAT WITHIN A FEW MINUTES AND BE SEATED FOR 2 HOURS.

6 DURING THESE 2 HOURS PLEASE DO NOT EAT OR DRINK ANYTHING NOR SHOULD YOU WALK AROUND. WATER IS OK. YOU MAY READ SOMETHING IF YOU WISH, WHILE SEATED

7 EXACTLY 120 MINUTES AFTER YOUR FIRST BLOOD SAMPLE WAS TAKEN, YOU WILL BE CALLED FOR A SECOND BLOOD DRAW FOR CHECKING BLOOD GLUCOSE LEVELS

8 THIS CONCLUDES THE TEST

9 PLEASE NOTE THERE IS NO NEED FOR ANY URINE SAMPLE, EVEN IF THE LABORATORY INSISTS ON IT

10 FURTHER, THERE IS NO NEED TO HAVE BLOOD SAMPLES TAKEN MORE THAN TWICE AT THE ABOVE RECOMMENDED PRECISE TIMES. REFUSE SUCH INCORRECT TESTING EVEN IF THE LABORATORY PERSONNEL INSIST
Note: For further follow-up, discuss your blood glucose reports with our diabetologist. Click here.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Shehzad Topiwala

Endocrinologist

Practicing since :2001

Answered : 1663 Questions

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Suggest Medical Tests To Rule Out Pre-diabetes

Brief Answer: Depends Detailed Answer: Whether or not your girl friend truly has Pre Diabetes depends on the type of test utilized to make that diagnosis. The best test is the Oral Glucose Tolerance Test (OGTT) which entails 8 hours of overnight fasting. The alternative test called HbA1c is more convenient but has some limitations. If she was told to have Pre diabetes based on the A1c, it would be worthwhile to undergo the OGTT to confirm this fact or otherwise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