Glucose Tolerance (3 Hour) Gestational Diabetes Panel
Order Name
GTT PREG
Test Number: 2023550
Revision Date 05/20/2021
Test Number: 2023550
Revision Date 05/20/2021
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Gestational Fasting Glucose
|
Hexokinase | 1558-6 |
|
Gestational 1hr Glucose
|
Hexokinase | 20438-8 |
|
Gestational 2hr Glucose
|
Hexokinase | 20436-2 |
|
Gestational 3hr Glucose
|
Hexokinase | 20437-0 |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 2 mL (0.5) | Plasma | Sodium fluoride (gray top) | Refrigerated |
| Alternate 1 | 2 mL (0.5) | Plasma | Lithium Heparin PST (Light Green Top) | Refrigerated |
| Alternate 2 | 2 mL (0.5) | Serum | Clot Activator SST | Refrigerated |
| Instructions | If the patient is not pregnant please use Glucose Tolerance (2 Hour Only) order name GLUC 2 HR. Must schedule collection Monday thru Friday from 8am to 12pm. Overnight fasting required. Nothing by mouth except water during testing. Collect a full Sodium fluoride (gray top) tube to for each time interval. 2mL (0.5) of Plasma is required for each glucose interval. Collect and label a baseline gray top tube for the Fasting Glucose. Then give the patient 100 grams Glucola. Collect and label a gray top for 1 hour, 2 hours and 3 hour interals after the ingestion of the Glucola. Stability: Ambient 8 hours, Refrigerated 7 days, Frozen 1 month Fluoride preserved plasma samples are stable at room temperature for 24 hours |
|||
| GENERAL INFORMATION | |
|---|---|
| Testing Schedule | Daily |
| Expected TAT | 1-2 days |
| Clinical Use | Used in diagnosing gestational diabetes, and to predict perinatal morbidity, risk of fetal abnormality and perinatal mortality. |
| Notes | For more information on this test, access our "Specialized Tests" section. |
| CPT Code(s) | 82951; 82952 |
| Lab Section | Chemistry |