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HelpGlucose Tolerance 50g Gestational Screen
Additional Codes
LAB5712
Performing Laboratory
MBMC Main Laboratory
Methodology
Hexokinase G6PDH/UV
Specimen Requirements
Collection Instructions:
NOTE: It is recommended that the patient fast for 2 hours before the test. No coffee, tea, gum, mints, food, or smoking. You can drink water.
1. Have patient ingest 50 grams of glucose solution within 5 minutes.
2. Draw blood 1 hour post ingestion.
Specimen Type: Plasma
Container/Tube: Gray top (potassium oxalate/sodium fluoride)
Alternative Container/Tube: Mint-green top (lithium heparin gel)
Alternative Specimen Type: Serum
Alternative Container/ Tube: Gold, Serum gel
Specimen Volume: Full tube
Specimen Transport Temperature
Ambient
Day(s) Test Set Up
Monday through Sunday
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: within 4 hours
Reference Values
Normal post 50 gram: < 140 mg/dL
Critical values (automatic call-back):
Adults: <55 mg/dL or >450 mg/dL
Test Classification and CPT Coding
Test Classification:This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer’s instructions.
CPT Code:
82950
Stability
Mint top or Gold: 3 days Refrigerated
Gray top tube: 5 days Refrigerated