Urine concentration testFrom our partner site on breast cancer, MyBreastCancerNetwork.com. The test involves only normal urination, and there is no discomfort. Why the test is performed: Most often, a urine concentration test is performed when diabetes insipidus is suspected and to help differentiate it from nephrogenic diabetes insipidus. advertisement SIADH (syndrome of inappropriate ADH ) -- a condition where urine concentrations are excessively high (water is conserved) given the person's degree of hydration -- is another condition where urine concentration values are helpful for diagnostic and therapeutic purposes. Normally, the kidneys regulate the concentration of urine by adjusting the excretion of water. Water excretion is regulated, in part, by ADH (anti-diuretic hormone).
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