Home
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 (preferred)
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.
Bismarck
Overnight fasting is required.
1) Draw one Green (Lithium Heparin) Tube or Gold (SST Serum) Tube.
(2) Give the patient 100 grams of glucose unless the order specifies to base the glucose load on weight. The drink must be consumed within 5 minutes.
(3) Draw one Green (Lithium Heparin) Tube or Gold (SST Serum) Tube at 1, 2 and 3 hours after the dose is given. Label each specimen with the time and number of specimen in addition to normal label requirements.
Specimen Volume
| Preferred Volume | 1.0 mL |
|---|---|
| Minimum Volume | 0.5 mL |
Stability/Transport
Sioux Falls, Fargo, Bemidji, Black Hills
| Room Temperature | 2 days | |
|---|---|---|
| Refrigerated | 7 days | Preferred for transport |
| Frozen | 3 months |
Bismarck
| Room Temperature | 8 hours | |
|---|---|---|
| Refrigerated | 3 days | Preferred for transport |
| Frozen | Not Acceptable |
Performed Test Frequency
Monday through Sunday
Report Available
1 - 3 days
Methodology
Sioux Falls, Fargo, Bemidji, Black Hills
Enzymatic (Hexokinase/G-6-PDH)
Bismarck
Hexokinase
Performing Lab
Sanford Laboratories Sioux Falls, Fargo, Bismarck, Bemidji, Black Hills
CPT
82947, 82950
Bismarck - 82952