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Glucose Tolerance 3 Hour
Test CodeLAB164
Alias/See Also
GTT3, GT2H4
CPT Codes
82951, 82952 x3
Includes
Fasting blood glucose followed by glucose levels drawn at timed intervals (1 hour, 2 hour, 3 hour) after administration of a glucose load (adults: 75 g glucose; pediatrics: 1.75 g/kg body weight, up to 75 g)
Instructions
"Routine venipuncture Collect fasting blood sample, then administer 75g glucola, unless otherwise ordered by physician Collect fasting, 1hr, 2hr, and 3hr postglucose administration specimens Gray top (sodium fluoride) tube; 4 blood draws"
Specimen Stability
Refridgerate
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
"Insufficient quanity, hemolysis, plasma left on cells overnight, failure to follow specimen stability requirements.
Note: Anorexia or any condition preventing food intake invalidates the procedure"
Note: Anorexia or any condition preventing food intake invalidates the procedure"
Methodology
Oxygen rate
Setup Schedule
Daily
Report Available
Within 24hrs
Reference Range
"Fasting: 74-106 mg/dL, 1 hour post dose: None established , mg/dl, 2 hour post dose: None established , mg/dl, 3 hour post dose: None established , mg/dl Critical for any: Less than 50 or greater the 450 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.
Additional Information
NCD-ABN_Preventative_Screening_Services
