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|31930:GLUCOSE TOLERANCE, 3 HOUR GESTATIONAL DIABETES MELLITUS DIAGNOSIS, 100 Gm DOSE|
|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.
|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.|
|Rejection Criteria:||Moderate hemolysis.|
|1 hour||<180 mg/dL|
|2 hours||<155 mg/dL|
|3 hours||<140 mg/dL|
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.