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Frequency of Hyponatremia and Nonosmolar Vasopressin Release in the Acquired Immunodeficiency Syndrome

Kevin E. Vitting, MD; Mark H. Gardenswartz, MD; Paul M. Zabetakis, MD; Michael L. Tapper, MD; Gilbert W. Gleim, PhD; Meenakshi Agrawal, MS; Michael F. Michelis, MD
JAMA. 1990;263(7):973-978. doi:10.1001/jama.1990.03440070061033.
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The frequency and pathophysiology of hyponatremia were studied in the acquired immunodeficiency syndrome. Of 71 hospitalized patients surveyed retrospectively, hyponatremia was observed in 37 (52%). Of 48 patients studied prospectively, 27 (56%) were hyponatremic. In 16 hyponatremic patients, volume status; serum and urine osmolalities; renal, adrenal, and thyroid function; and plasma vasopressin levels were assessed. Urine osmolalities were inappropriately elevated (mean, 377 mmol/kg of water) relative to serum osmolalities (mean, 268 mmol/kg of water). Four patients had moderate renal insufficiency. Plasma vasopressin levels were elevated in 15 patients, with the highest levels seen in patients who died (median, 7.08 pmol/L). Hyponatremia of multiple etiologies occurred in a majority of inpatients with the acquired immunodeficiency syndrome, often following the administration of hypotonic fluids, and was associated with a 30% (8/27) short-term mortality.

(JAMA. 1990;263:973-978)


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