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| 31930:GLUCOSE TOLERANCE, 3 HOUR GESTATIONAL DIABETES MELLITUS DIAGNOSIS, 100 Gm DOSE | |||||||||
| Methodology: | Hexokinase | ||||||||
| Edit Date: | 6/11/2010 | ||||||||
| Performed: | Daily | ||||||||
| Released: | Same day as tested | ||||||||
| CPT Code: | 82951 / 82952 | ||||||||
| Specimen Collection Details | |||||||||
| Collection: | NOTE: THIS TEST IS FOR PREGNANT WOMEN. Collection performed Monday-Saturday by appointment with PeaceHealth Laboratories Outpatient Phlebotomy. Patient must be fasting for 8-16 hours prior to collection. Four specimens required. Collect one 7.5 mL serum separator tube (SST) each draw. Also acceptable: One 4.5 light green top plasma separator tube (PST), one 2 mL grey top tube, or one 5 mL gold top serum separator tube (SST) for each draw. Four specimens total: Fasting, 1 hour, 2 hour, and 3 hour. Procedure: A glucola dosage of 100 grams is administered after fasting specimen is drawn. The 1 hour, 2 hour, and 3 hour specimens are drawn subsequent to the ingestion of the glucola dose. |
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| Handling: | Centrifuge and separate serum or plasma from cells within 2 hours. Specimens drawn in serum or plasma separator tubes can be transported in the original tube after centrifugation. Clearly indicate the draw time and fasting or minutes post-glucola dose, and the order of each draw, e.g., “1 of 4,” etc., on each specimen. Refrigerate. | ||||||||
| Stability: | 8 hours ambient, 6 days refrigerated, or 3 months frozen. | ||||||||
| Standard Volume: | 2 mL serum or plasma. | ||||||||
| Minimum Volume: | 0.5 mL serum or plasma. | ||||||||
| Transport: | Refrigerated. | ||||||||
| Rejection Criteria: | Moderate hemolysis. | ||||||||
| Fasting | <95 mg/dL | ||||||||||||||||||
| 1 hour | <180 mg/dL | ||||||||||||||||||
| 2 hours | <155 mg/dL | ||||||||||||||||||
| 3 hours | <140 mg/dL | ||||||||||||||||||
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Interpretive Guidelines: The Diagnosis of Gestational Diabetes Mellitus requires that any two of the four plasma glucose values obtained during the 3 hour glucose tolerance exceed the reference range. |
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