Insulin Tolerance Test

Indications

Contraindications

Precautions

Procedure

  1. Insert an IV line.
  2. Obtain baseline glucose, cortisol and growth hormone levels.
  3. Administer regular insulin 0.1 units / kg iv bolus followed by a saline flush.
  4. Obtain glucose, cortisol and growth hormone levels every 20 minutes.
  5. Once glucose is < 2.2 mmol/L and the patient has symptoms of hypoglycemia, administer 25 mL (half an ampule) of 50% dextrose, intravenously.
  6. The patient should have a glucose level > 4 mmol/L before leaving the testing centre.

Interpretation

Caveats

See Also