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HelpTest ID BLOD0787 Glucose Gestational Diabetes Tolerance, 3 Hour
Synonym
3Hr GTT, GTT
Specimen Type/Requirements
Light Green top (Lithium Heparin w/gel) tube - Plasma
Gold top (Serum w/gel) tube - Serum
Red top (Serum w/out gel) tube - Serum
Overnight fasting is required.
Give 100 gram oral glucose load after drawing fasting specimen.
Properly label specimens with date and time.
Specimen should be centrifuged and separated within 2 hours of collection.
Panel includes a fasting glucose and a 1 Hour, 2 Hour and 3 Hour post glucose dose.
Test may be affected by gross hemolysis, gross icterus and gross lipemia.
Specimen Volume
| Preferred Volume | 1.0 mL |
|---|---|
| Minimum Volume | 0.5 mL |
Stability/Transport
| Room Temperature | 2 days | |
|---|---|---|
| Refrigerated | 7 days | Preferred for transport |
| Frozen | 3 months |
Performed Test Frequency
Monday through Sunday
Report Available
1 - 3 days
Methodology
Enzymatic (Hexokinase/G-6-PDH)
Performing Lab
Sanford Laboratories Sioux Falls, Fargo, Bismarck, Bemidji, Black Hills
CPT
82947, 82950