Glucose, 3-Hour (after 75 g Oral Glucose) details
What Glucose, 3-Hour (after 75 g Oral Glucose) shows
In an extended 75 g oral glucose tolerance test, you drink a standard glucose solution after fasting, and blood is drawn at several points over the following hours. This value is your glucose level three hours after the drink. By this time glucose has usually returned close to fasting levels, so the later samples help show how your body recovers from a sugar load. A higher result can suggest glucose is being cleared slowly, as in impaired glucose tolerance, while a low result can point to reactive hypoglycemia, a drop in sugar after an earlier insulin surge. It is interpreted as part of the full curve, together with your symptoms.
Tests that include Glucose, 3-Hour (after 75 g Oral Glucose)
For appropriate interpretation of this test, the patient must fast overnight and ingest a 75 g load of glucose, immediately after a fasting specimen is obtained. (for children, the glucose load is 1.75 g/Kg of body weight, up to 75). The diagnosis of diabetes is made if glucose exceeds 200 mg/dL in the 2 hour specimen and in any preceding specimen.
- Fasting Glucose Blood sugar measured after fasting, one of the primary tests used to screen for prediabetes and diabetes.
- Glucose, 1-Hour (after 75 g Oral Glucose) Your blood glucose one hour after a 75 g glucose drink, part of an oral glucose tolerance test used to assess how your body handles sugar.
- Glucose, 2-Hour (after 75 g Oral Glucose) Your blood glucose two hours after a 75 g glucose drink, a key value in the oral glucose tolerance test for diabetes and prediabetes.
- Glucose, 3-Hour (after 75 g Oral Glucose) Your blood glucose three hours after a 75 g glucose drink, part of an extended glucose tolerance test that also looks for late drops in sugar.
- Glucose, 30-Minute (after 75 g Oral Glucose) Your blood glucose 30 minutes after a 75 g glucose drink, part of an extended glucose tolerance test that tracks your early sugar response.
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