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Alternative namesADH is a test that measures the amount of ADH in serum. ADH is a hormone found in the body. It may also be given as a medication.
How the test is performedAdult or child:
Blood is drawn from a vein, usually from the inside of the elbow or the back of the hand. The puncture site is cleaned with antiseptic. An elastic band is placed around the upper arm to apply pressure and cause the vein to swell with blood.
A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. During the procedure, the band is removed to restore circulation. Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.
How to prepare for the testConsult your health care provider about your medications before the test. Many medications, including nicotine, insulin, diuretics, lithium, morphine, alcohol, steroids, haloperidol, and clonidine can affect ADH measurements.
Infants and children:
The preparation you can provide for this test depends on your child's age, previous experiences, and level of trust. For general information regarding how you can prepare your child, see the following topics:
How the test will feelWhen the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.
Why the test is performed
This test is performed if a disorder that affects the ADH level is suspected.
In certain diseases, the normal release of ADH is altered, and the serum level of ADH must be tested to determine the cause.
Normal ValuesValues of 0 to 4.7 pg/mL are normal. Normal value ranges may vary slightly among different laboratories.
Note: pg/ml = picograms per milliliter
What abnormal results meanGreater-than normal-levels may indicate:
What the risks are
There are none.
Update Date: 2/2/2004Tarun Jain, M.D., Endocrinology & Infertility Division, Brigham and Women's Hospital, Boston, MA. Review provided by VeriMed Healthcare Network.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT