Lab

Glucose Tolerance Test 2 hour

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Glucose Tolerance Test 2 hour, Two hour Glucose Tolerance Test, OGTT

  • Indications (rarely indicated)
  1. Diagnosis of Diabetes Mellitus
    1. Replaced by Fasting Serum Glucose >126 mg/dl (and Hemoglobin A1C >6.5%)
    2. May be useful in Insulin Resistance
  • Protocol
  1. Administer 75 grams Glucola drink
  2. Measure Serum Glucose over 2 hour period
  • Interpretation
  1. Positive if 2 values exceed 200 mg/dl
  2. Elevated values must include 2 hour Glucose