Name: Glucose Tolerance, 3 hour
Test Name: Glucose Tolerance, 3 hour
Health Link Test Code: HCGLUTOL3
LIS Test Code: GLUTOL3
CPT Code(s): 82951, 82952
Fasting glucose, 60 min., 2 hour, and 3 hour draw after administration of a glucose-containing solution.
Days Performed: Daily, 24 hours.
In-Lab Turnaround Time: 4 hours.
Stat In-Lab Turnaround Time: Not available stat.
Patient should have nothing to eat or drink (except water) for a minimum of 8 hours before test.
Collection Container: Green cap with yellow ring (PST)
Also Acceptable: Green top, Red cap with yellow ring (SST), Red top
A fasting blood glucose specimen is drawn. The patient ingests a solution containing 100 gm of glucose. Blood samples are drawn at 60 minutes, 2 hours, and 3 hours post-ingestion.
Collection Volume: 1 mL
Pediatric Collection Volume: 0.3 mL
PST: 48 hours
SST: 4 days
Sample Analyzed: Plasma or serum
Testing Volume: 0.5 mL
Pediatric Testing Volume: 0.1 mL
Centrifuge. If a complete barrier has not formed, transfer cell-free plasma/serum to plastic vial. Refrigerate.
Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.
Hemolyzed specimens or whole blood specimens greater than 2 hours old when received by the laboratory are not acceptable.
Critical Calls: yes