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GLUCOSE TOLERANCE, 2 HOUR GESTATIONAL
Test CodeGLUG2 (OE), GLUCG2 (LAB)
CPT Codes
82951
Includes
- Baseline (glucose) fasting
- 1 hour glucose (post 75g dose)
- 2 hour glucose (post 75g dose)
Preferred Specimen
Gold Tube (SST)
Patient Preparation
A total of 3 specimens will be drawn.
- Draw fasting specimen
- Administer 75g oral glucose (Glucola) or dose specified by physician
- Draw specimen 1 hour after consumption of oral glucose (Glucola)
- Draw specimen 2 hours after consumption of oral glucose (Glucola)
Minimum Volume
1 mL
Other Acceptable Specimens
Green Tube (Lithium Heparin)
Instructions
Centrifuge specimen immediately and separate serum or plasma from red cells to minimize the loss of gluocse through glycolysis.
Transport Container
GOLD Tube
Transport Temperature
Room temperature
Specimen Stability
- 2-8°C up to 3 days
- 15-30°C up to 24 hours (plasma)
- 15-30°C up to 8 hours (serum)
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
- Collection time not labeled correctly on tube(s)
- Hemolyzed
Methodology
Hexokinase
Setup Schedule
DAILY, as received
Report Available
STAT: <60 minutes
Routine: <4 hours
Routine: <4 hours
Reference Range
- Test: GLUCOSE FASTING - 2HRS Male/Female All Ages: Normal Range: <92 Test:
- GLUCOSE,1 HR GEST - 2HR TEST Male/Female All Ages: Normal Range: <180 mg/dL Test:
- GLUCOSE,2 HR GEST - 2HR TEST Male/Female All Ages: Normal Range: <153 mg/dL
Clinical Significance
Establish the diagnosis of diabetes mellitus in the pregnant patient. This test is a one step gestational glucose tolerance offered as an alternative to the American College of Obstetrics and Gynocology (ACOG) recommended two-step screening approach.
Performing Laboratory
Mount Sinai Hospital
Holy Cross Hospital
