Acute renal failure (ARF) is a common problem in critical care; therefore, nurses should consider it to be a potential issue for all of their patients. Fluid management and diuretic therapy are important in these patients. The aim of this study is to review the use of these interventions in patients in acute renal failure. Initially, the paper will review renal physiology and discuss some of the causes of acute renal failure. This will be followed by a critical examination of the evidence surrounding the use of crystalloids and colloids for fluid resuscitation, as well as the role of diuretics in patients with acute renal failure. The paper concludes by identifying approaches for developing future practice in this area.