Table 12.13.

Types of postoperative oliguria and management

Type of oliguria/AKI	Cause	Management
Prerenal	Hypovolemia Hypotension	Fluid challenge of 250 ml iv fluid over 1 h Address the cause of hypotension
Renal	Nephrotoxic drugs: NSAIDS, aminoglycosides, steroids Sepsis	Discontinue the offending drug Aggressive treatment with broad spectrum antibiotics and fluid resuscitation
Post-renal	Blocked Foley’s catheter Blocked ureter	Relieve obstruction