For an Oral Glucose Tolerance Test (OGTT), a person is fasting for 10 to 14 hours prior to the start of the test. To begin, a beverage containing 75 grams
glucose is consumed. Blood is then drawn every half hour for 2 hours.Diabetes is diagnosed if Plama Glucose levels are:
Above 200 mg/dl |
2 hours after consuming glucose load and at least 1 other time blood was drawn during the test. |
Women with gestational diabetes are diagnosed using a modified OGTT. During pregnancy, a
100 gram glucose beverage is consumed for the OGTT. Blood is drawn every hour for 3 hours.Gestational diabetes is diagnosed if two or more plasma glucose levels equal or exceed these
plasma glucose levels:
. |
PLASMA GLUCOSE |
Fasting |
105 mg/dl |
1 hour |
190 mg/dl |
2 hour |
165 mg/dl |
3 hour |
145 mg/dl |
|
