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GTT3H
GLUCOSE TOLERANCE TEST, GESTATIONAL, 3 HOUR (100GM GLUCOLA)

Test Code GTT3H 
Test GLUCOSE TOLERANCE TEST, GESTATIONAL, 3 HOUR (100gm GLUCOLA) 
Methodology Spectrophotometric 
Description Useful in diagnosis of diabetes mellitus (gestational) 
Specimen NOTE: Glucose Tolerance Tests are drawn at NorDx Patient Service Centers Monday through Friday only.

Draw a fasting specimen in either a plain, red-top tube or serum gel tube (HEMOLYZED SPECIMEN IS NOT ACCEPTABLE.). Spin down and separate serum from clot within 2 hours. Send 1.0 mL (minimum volume: 0.3 mL) of serum refrigerated.

A gray sodium fluoride tube may be substituted if the specimen cannot be spun and separated within two hours of collection. Send refrigerated.

After glucola has been administered draw a specimen at the 1 hour, 2 hour and 3 hour time intervals using the specimen collection criteria noted above. 

Reference Values Fasting: 70-94 mg/dL
1 hour: 70-179 mg/dL
2 hours 70-154 mg/dL
3 hours 70-139 mg/dL 
Analytic Time 1 Day 
Day(s) Test Set Up Monday through Sunday 
CPT Code(s) 82951  
82952