Glucose Tolerance Test, Gestational, 4 Specimens (100 g)
Use
This test measures plasma glucose levels in fasting and at 1, 2, and 3 hours after ingestion of a 100 g oral glucose load, used for diagnosis of gestational diabetes mellitus by detecting hyperglycemia, per National Diabetes Data Group (NDDG) or ACOG guidelines.
Special Instructions
Fasting is required (no food or beverage except water for at least 8 hours before testing). Obtain fasting specimen, have patient consume 100 g glucose solution within approximately 5 minutes, then collect specimens at 1-, 2-, and 3-hour intervals; label each with draw time.
Limitations
Not provided.
Methodology
Other
Biomarkers
Result Turnaround Time
5 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
4 x 1 mL
Minimum Volume
Not provided
Container
Gray-top (fluoride/oxalate) tube
Collection Instructions
Fasting specimen first; then 100 g glucose load; collect subsequent specimens at 1h, 2h, and 3h, label each draw time.
Patient Preparation
Fasting required: no food or beverage except water for at least 8 h before testing.
Causes for Rejection
Unspun SST; red-top or non-plasma separator (PST) green-top tubes; anticoagulants other than fluoride/oxalate.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |