Manejo de agua y sodio por el riñón senescente. Interpretación de una técnica de aclaramiento para su estudio funcional

Hydroelectrolytic disorders, especially hyponatremias, are frequent in the elderly and are generally due to a syndrome of inappropriate antidiuretic hormone secretion. Although this is the most common cause in young adults, the most frequent cause in the elderly is Na depletion due to impaired competence of the thick ascending limb of Henle's loop. Localization was performed through hyposaline loading and clearance study using Chaimowitz's technique, which we describe and discuss in the present article.