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Primary PolydipsiaSyndrome of Inappropriate Thirst
Raymond C. Mellinger, MD;
M. Saeed Zafar, MD
Arch Intern Med. 1983;143(6):1249-1251.
Abstract
• A patient with lifelong severe polyuria and polydipsia had normal serum antidiuretic hormone (ADH) levels and responded to water deprivation with a prompt increase in urine osmolality and maintenance of normal plasma osmolality (<290 mOsm/kg), despite extreme thirst. When treated with desmopressin acetate and allowed free access to water, she was able to reduce plasma osmolality below 270 mOsm/kg, and her compelling thirst disappeared. The disorder is interpreted to be the result of excessive fluid intake in response to a thirst stimulus that was not inhibited by normal plasma osmolality. This study indicates that osmoreceptor control of ADH secretion is normal. Continued administration of vasopressin has relieved the symptoms and has not resulted in water intoxication.
(Arch Intern Med 1983;143:1249-1251)
Author Affiliations
From the Division of Endocrinology, Henry Ford Hospital, Detroit. Reprints not available.
Footnotes
Accepted for publication Nov 1, 1982.
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