Regional Medical Laboratory

General

1. The patient should be on a high carbohydrate diet for three days prior to testing.
2. The patient must be fasting and remain so during the entire test period.

Procedure:

Standard Oral Glucose Tolerance

1. A fasting blood sample is obtained.
2. The glucose drink may be chilled or ice chips may be used to make it more palatable. See schedule below for dosage.
3. Note the time when the patient finishes drinking the glucose.
4. Blood samples are taken following the schedule below. All draws, except the initial draw, are timed from the time the patient finishes drinking the glucose.

Non pregnant adults receive a 75g (7.5 oz) dose with a Blood Glucose level at the following intervals:
[0min.] [60min.] [120min.]

Gestational 2 hour receive a 75g (10 oz) dose with a Blood Glucose level at the following intervals:
[0min.] [60min.] [120min.]

Gestational 3 hour receive a 100g (10 oz) dose with a Blood Glucose level at the following intervals:
[0min.] [60min.] [120min.] [180min.]

Children (< 12 years) receive a 1.75 g/kg (max 75g or 7.5 oz) dose with a Blood Glucose level at the following intervals:
[0min.] [60min.] [120min.]