The parameters indicating acute renal failure in the elderly with normal serum creatinine values

The paper deals with the laboratory parameters indicating acute renal failure: the renal failure index and the excretional fraction of filtered sodium in 51 patients aged 71-89 hospitalized in an Intensive Care Unit. Every patient have had normal serum creatinine values. The patients were divided according to the renal failure index in two groups: with the renal failure index less than 1.0 and with index greater than 1.0. The values of the renal failure index amounted to approximately 1.9, maximum to 2.7, and the excretional fraction of filtered sodium to approximately 1.4, maximum to 2.0.