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Test Listing: GLUCOSE TOLERANCE, GEST 3 HR



Code 318
Test or Panel Profile
Name GLUCOSE TOLERANCE, GEST 3 HR
Specimen Type N/A
Preferred Volume 2 mL each specimen
Minimum Volume (Emergencies only) 0.3 mL each specimen
Patient Prep This test should be done in the morning after an overnight fast of between 8 and 14 hours, and after at least 3 days of unrestricted diet (150 or more grams carbohydrate per day) and unlimited physical activity. The patient should remain seated and should not smoke throughout the test. Patient can have nothing by mouth except water during test period. GLUCOSE DOSE: 100 grams.
Collection Procedure Draw fasting specimen just prior to 100 gram glucose load. Draw 1 hour, 2 hour and 3 hour post-dose specimens. Clearly label specimens.
Specimen Processing Separate serum from cells within 30 minutes of collection and transfer to standard aliquot tube.
Storage and Transport N/A
Stability N/A
Unacceptable Condition N/A
Alternate Specimens Lithium heparin or sodium fluoride/potassium oxalate (green or gray top tube). Gray top tube whole blood is stable 24 hours.
Limitations N/A
CPT Codes 82951, 82952
Interface Order Code N/A
Testing Schedule Mon-Fri
Available STAT? No
Turnaround Time 24 Hours
Methodology Hexokinase
Alias GTPG
Synonyms GLUCOSE TOLERANCE, PREGNANT (3HR)

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