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HelpTest ID BLOD0787 Glucose Gestational Diabetes Tolerance, 3 Hour
AKA
3Hr GTT, GTT
Specimen Type/Requirements
Grey top (Sodium Fluoride) tube - Plasma (preferred)
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. Separate serum/plasma from cells within 1 hour of collection.
Properly label specimens with date and time.
Test is affected by gross hemolysis. Test is not affected by lipemia.
Specimen Volume
| Preferred Volume | 1.0 mL |
|---|---|
| Minimum Volume | 0.6 mL |
Stability/Transport
| Room Temperature | 24 hours | |
|---|---|---|
| Refrigerated | 7 days | Preferred for transport |
| Frozen | 3 months |
Performed Test Frequency
Monday through Sunday
Methodology
Sioux Falls – Enzymatic Hexokinase
Rapid City – Enzymatic Hexokinase
Performing Lab
Sanford Laboratories Sioux Falls
Sanford Laboratories Rapid City
CPT
82951, 82952