RT Book, Section A1 Sterns, Richard H. A2 Lerma, Edgar V. A2 Rosner, Mitchell H. A2 Perazella, Mark A. SR Print(0) ID 1149111535 T1 Disorders of Water Balance: Hyponatremia and Hypernatremia T2 CURRENT Diagnosis & Treatment: Nephrology & Hypertension, 2e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781259861055 LK accessmedicine.mhmedical.com/content.aspx?aid=1149111535 RD 2024/04/19 AB Essentials of DiagnosisHyponatremia develops when water intake exceeds water losses.Most cases of hyponatremia are caused by impaired water excretion due to excess antidiuretic hormone (ADH).The reason for excess ADH can be determined by a clinical assessment of extracellular volume status and measurement of urine chemistries.