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Glucose Tolerance 1 hr, 2 draws
Test CodeLAB879
Alias/See Also
GT1H2
CPT Codes
82947, 82950
Includes
Fasting glucose followed by glucose level drawn 1 hour after administration of glucose load (adults: 50 g glucose; pediatrics: 1.75 g/kg body weight glucose up to 50 g glucose
Instructions
"Routine venipuncture
collect fasting and 1-hour postglucose administration specimens.
Gray top (sodium fluoride) tube, 2 blood draws"
collect fasting and 1-hour postglucose administration specimens.
Gray top (sodium fluoride) tube, 2 blood draws"
Specimen Stability
Room temperature, stable <8 hours; stable <48 hours if refrigerated
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Insufficient quantity; hemolysis; plasma left on cells overnight; failure to follow stability 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 24hrs
Reference Range
"Fasting: 74-106 mg/dL
1 Hour post dose: None established , mg/dl
Critical for either: Less than 49 or greater the 451 mg/dL"
1 Hour post dose: None established , mg/dl
Critical for either: Less than 49 or greater the 451 mg/dL"
Clinical Significance
Glucose measurements are used in the diagnosis and treatment ofcarbohydrate metabolism disorders including diabetes mellitus, neonatalhypoglycemia, idiopathic hypoglycemia, and pancreatic islet cellcarcinoma.
