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GLUCOSE TOLERANCE 2HR
Test CodeGTT2
CPT Codes
82951 (3 specimens), 82952 each additional beyond initial 3 specimens
Includes
Fasting glucose,30 min post glucose, 1 hr post glucose, and 2 hr post glucose
Preferred Specimen
1.0 mL (x4) plasma collected in a NaFl KOxl (gray-top)
Minimum Volume
0.5 mL (x4)
Instructions
Patient should be fasting a minimum of 12 hours. No smoking and only mild excercies. A finger stick glucose and venous fasting specimen is collected. The finger stick glucose must be less the 125 mg/dL. If it is higher consult with patient's physician and verify that testing should be continued. Immediately after a fasting specimen is obtained, have patient ingest a 100 gm ( or as directed by physician) loaded dose of glucose. Draw subsequent specimens 30 minutes, 1 and 2 hours later. Label each with the specific draw time. No eating, drinking or smoking during testing interval. Patients weighing less than 100 pounds must have glucose dose adjusted. Contact the laboratory for specific instruction.
Specimen Stability
Room Temperature:
Plasma \Serum
Fluoride Plasma
8 hours at 15-25°C
3 days at 15-25°C
Refrigerated:
Plasma \Serum
CSF
3 days at 2-8°C
should be analyzed immediately or stored at 4°C or -20 °C
Frozen: Not specified
Plasma \Serum
Fluoride Plasma
8 hours at 15-25°C
3 days at 15-25°C
Refrigerated:
Plasma \Serum
CSF
3 days at 2-8°C
should be analyzed immediately or stored at 4°C or -20 °C
Frozen: Not specified
Last Updated: February 27, 2018
