Postoperative renal failure

Risk factors include hypovolaemia, haemodynamic instability (particularly hypotension), major abdominal surgery in those >50 years, major surgery in jaundiced patients and biliary and other sepsis. Surgical procedures (particularly gynaecological) may be complicated by damage to the lower urinary tract with an obstructive nephropathy. Abdominal aortic aneurysm surgery may be associated with renal arterial disruption and should be investigated urgently with renography and possible arteriography or re-exploration.

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