South
Dakota
Gestational Diabetes Care Guidelines
Diagnosis
- One hour 50 g GCT > 200 mg/dl may be used as an indication to treat for GDM without further testing because it highly correlates with a positive 3-hour 100 g OGTT.
- The definitive test for GDM is a 3-hour 100 g OGTT in a fasting state after a 3-day carbohydrate loading diet.
- Use Carpenter and Coustan’s standards for the 3-hour
- 100 g OGTT. Abnormal serum/plasma glucose values follow.
Time |
mg/dl |
---|---|
fasting |
> or equal to 95 |
1-hour |
> or equal to 180 |
2-hour |
> or equal to 155 |
3-hour |
> or equal to 140 |
- Two or more elevated values define GDM.
- If one elevated value, recommend exercise and nutrition counseling and either repeat 3-hour 100 g OGTT in one month or perform periodic glucose monitoring.
- 30% of patients with one abnormal value on the 3-hour
100 g OGTT will be diagnosed with GDM if retested in
4 weeks.
- All patients with a new diagnosis of GDM should have diabetes education. (See enclosed Gestational Diabetes Care Components).
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