water deprivation test


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water deprivation test

Endocrinology A test of the ability to ↑ the concentration–osmolality of urine in response to withholding water. See ADH, Dehydration.
References in periodicals archive ?
If initial history, physical exam, and laboratory assessment are concerning for either CDI, NDI, or PP, a water deprivation test should be performed to differentiate between the three possible diagnoses (Table 2) [1, 2].
A water deprivation test involving withholding of free water to stimulate ADH secretion may be used but is not necessary for the diagnosis.
For example, there's no procedure in the CPT for a water deprivation test, which is the only way to diagnose central diabetes insipidus, but which can take an unspecified period--perhaps several hours--to conduct.