Item Value
Test name 2 Hour, 75 gram Glucose Tolerance Test, Non-pregnancy
Available Stat? No
In House Availability Test available 24 hours per day 7 days per week
Performed by Parnassus, Mission Bay & Mt. Zion Chemistry
Patient Preparation The patient should be instructed by the care-giver to eat a normal diet containing at least 150 g of carbohydrate and carry out normal physical activity for at least 3 days prior to the morning of the test. An overnight fast of between 8 to 14 hours is required before initial baseline sample collection.
Normal range
Fasting 70-99 mg/dL
Normal (post glucose) < 140 mg/dL
Impaired glucose tolerance (post glucose) 140-199 mg/dL
Diabetes mellitus (post glucose) > 199 mg/dL*

* If confirmed on another day by repeat OGT, or a diagnostic elevation of the fasting or non-fasting glucose.
Container type Gray top
Amount to Collect 1 mL blood Click here for Microdetermination info
Collection Instructions Outpatient testing at ACC available 0730-1400 weekdays, Mission Bay from 0700-1400 and at 2330 Post St. 0800-1400 weekdays.

The patient should be seated for the test and should not smoke.

A gray top tube should be used.

For patients < 18 years of age, obtain the patient's weight and give the patient 1.75 g of glucose per kg of body weight. If the weight is in pounds, divide by 2.2 to get kg. Do not provide more than 75 g dose regardless of body weight.
Sample type Serum

If you have additional questions regarding this test, please call: 415-353-1667