After the IV is placed, the needle is removed and a small, flexible catheter remains. Procedure:Īn IV is placed in a vein in your arm to prevent multiple needle sticks. The visit lasts approximately 90 minutes and includes registration, placing the IV, and doing the test. It can be done any time of day, and you do not have to fast. Preparation:Ĭertain medicines may be held, but there are no other restrictions. The test is done to diagnose ACTH or cortisol deficiency, a condition named adrenal insufficiency. It is important for regulating many body functions such as: Cortisol is made in the adrenal glands which are above the kidneys. One function of the pituitary gland is to control the amount of a hormone called cortisol. The pituitary gland is a pea-sized gland at the base of the brain. Adrenocorticotropic hormone (ACTH) is made in the pituitary gland.
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