[Electrolyte changes in acute renal failure].

One hundred and fifty two patients out of two hundred and forty six with acute renal failure (A.R.F.) were selected because of a more complete study of the serum and urine electrolytes have been performed. All patients had acute parenquimatous renal failure (no pre or postrenal failure) most likely due to tubular or cortical necrosis. No acute or chronic glomerulopathies were included. The patient sample comprehended seventy three males and seventy nine females with ages between fifteen and eighty five years old. They were divided in four groups according with the primary disease: A) Medical cases (63 patients), B) Obstetrical and Gynecological (40 patients), C) Postraumatic (25 patients), and D) Postsurgical (24 cases).