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Glucose Tolerance Test, Postprandial/1-Hour : 8476
Test CodeGPC1AU or 8476
CPT Codes
82947
Instructions
Patient Preparation:
Specimen is obtained 1 hour following a meal
Serum and plasma submissions must be separated from cells.
Specimen is obtained 1 hour following a meal
Serum and plasma submissions must be separated from cells.
Transport Container
Preferred Specimen
1 mL plasma collected in a fluoride/oxalate (gray-top) tube
Alternative Specimens
Plasma from fluoride/oxalate (gray-top), lithium heparin (green-top) or sodium heparin (green-top) tube in a plastic screw-cap vial, Serum (separated from cells immediately) in a plastic screw-cap vial, Spun SST®
Minimum Volume
0.5 mL
1 mL plasma collected in a fluoride/oxalate (gray-top) tube
Alternative Specimens
Plasma from fluoride/oxalate (gray-top), lithium heparin (green-top) or sodium heparin (green-top) tube in a plastic screw-cap vial, Serum (separated from cells immediately) in a plastic screw-cap vial, Spun SST®
Minimum Volume
0.5 mL
Transport Temperature
Room temperature.
Specimen Stability
Serum
Room temperature: 4 days
Refrigerated: 7 days
Frozen: 28 days
Whole blood (gray-top) tube
Room temperature: 24 hours
Refrigerated: 72 hours
Frozen: Unacceptable
Sodium fluoride plasma
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days
Heparinized plasma
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 28 days
Room temperature: 4 days
Refrigerated: 7 days
Frozen: 28 days
Whole blood (gray-top) tube
Room temperature: 24 hours
Refrigerated: 72 hours
Frozen: Unacceptable
Sodium fluoride plasma
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days
Heparinized plasma
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Unspun serum or plasma separator tube (SST® or PST), Red-top or green-top tube (serum or heparinized plasma not separated from cells), Anticoagulants other than lithium heparin, sodium heparin or fluoride/oxalate
Methodology
Spectrophotometry
Setup Schedule
Sunday - Saturday
Report Available
1 day
Reference Range
Not established
Clinical Significance
Postprandial glucose levels may be abnormally high in patients with gestational diabetes. If results are positive, and the patient is pregnant, a 3-hour oral glucose tolerance test should be performed for confirmation of gestational diabetes.
Performing Laboratory
med fusion
