See chapter 19. Growth hormone level Blood test that requires fasting. Stress can affect the results. Hypertonic saline test Used for diabetes insipidus. Overnight fasting before test.
Normal values depend on age and sex.
Higher values during normal puberty. Insulin tolerance test Stimulation test in which a dose of insulin is given intravenously. Blood is drawn before and every 15 minutes after the insulin dose for 90 minutes. Blood is tested for glucose, growth hormone, cortisol, and prolactin. Iodine uptake test See below for a full description.