The document discusses acute renal failure (ARF), defining it as a rapid reduction in kidney function over days or weeks. It describes ARF as oliguric (<500mL urine/day), anuric (<100mL/day), or non-oliguric. Causes include pre-renal (e.g. dehydration), post-renal (e.g. blockages), and intrinsic renal failure. ARF diagnosis involves labs, ultrasound, and treating underlying causes while preventing complications like electrolyte abnormalities.

1. Acute Renal Failure Or The Kidney Is Your Friend Katie Murphy MD September 2007