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Glucose Tolerance 2 Hour, OB
Test CodeLAB6089
Alias/See Also
82951; 01274; 011333; GTOB; 2HGTT; 2 Hour Obstetric Glucose Tolerance, GTTO2
CPT Codes
82951
Includes
"Fasting blood glucose followed by glucose levels drawn at timed intervals after administration of a glucose load (75 g glucose). Glucose, Obsetric Fasting Glucose, Obstetric 1 Hour Glucose, Obstetric 2 hour"
Instructions
"Routine venipuncture; Collect fasting blood then administer 75g glucola unless specified by physician Collect fasting, 1hr and 2hr postglucose administration specimens. Gray top (sodium fluoride) tube; 3 blood draws"
Specimen Stability
Room Temperature stable 8 hrs, Refrigerated 48 hrs
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Insufficient quantity, hemolysis, plasma left on cells overnight, failure to follow specimen requirements
Methodology
Colorimetric:The oxidation of sample glucose is catalyzed by glucose oxidase to form hydrogen peroxide and gluconate.
Setup Schedule
Daily
Report Available
Within 24 hours
Limitations
Testing is for Obstetric Patients Only
Reference Range
"Glucose, Obsetric Fasting 65-92 mg/dL
Glucose, Obstetric 1 Hour 65-180 mg/dL
Glucose, Obstetric 2 hour 65-153 mg/dL
Critical Value is less than 49 or greater than 451 mg/dL for any collection"
Glucose, Obstetric 1 Hour 65-180 mg/dL
Glucose, Obstetric 2 hour 65-153 mg/dL
Critical Value is less than 49 or greater than 451 mg/dL for any collection"
Clinical Significance
Glucose measurements are used in the diagnosis and treatment ofcarbohydrate metabolism disorders including diabetes mellitus, neonatalhypoglycemia, idiopathic hypoglycemia, and pancreatic islet cellcarcinoma.
