Glucose Tol Test 50 (GT5)

Department: Chemistry
Test Synonym(s): LAB879, GT5, Glucose Tolerance 50 G (Screening) For Gestational Diabetes, Glucose Tolerance Test 50
CPT Codes: 82950
Methodology: Hexokinase/G-6-PDH
Reference Range: 0-150 yrs: <139 mg/dL
Tube Type: Grey top - 5 mL, Performed following 50 g Glucola ingestion. Overnight fasting is required.
Specimen: Plasma
Pediatric Requirements: 1 light green top microtainer
Volume: 3 mL plasma
Minimum Volume: 1 grey top (Pediactric = 1 light green top microtainer)
Temperature: Store/ship @ ambient temperature until delivery
Stability: Refrigerated: 3 days; Frozen: 6 months
Reasons for Rejection: Hemolysis, improper collection
Days Performed: Daily
Times Performed: Continuous
TAT: STAT: 1 hour; ROUTINE: 2 hours after receiving in lab
Significance: Screen for Gestational Diabetes
Special Instructions: Must show collection time. Draw sample 60 minutes after ingestion of 50g Glucose.

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