Renal failure after operation for abdominal aortic aneurysm.

Area of Science:

• Cardiovascular Surgery
• Nephrology
• Critical Care Medicine

Background:

• Abdominal aortic aneurysm (AAA) surgery carries a significant risk of postoperative complications.
• Renal failure is a serious complication following AAA repair, affecting patient outcomes and survival.
• Hypotension and shock are more prevalent in patients with ruptured AAA compared to elective cases.

Purpose of the Study:

• To investigate the incidence and outcomes of postoperative renal failure in patients undergoing AAA surgery.
• To compare the mortality rates between patients requiring dialysis and those managed non-dialytically.
• To assess the long-term survival of patients who develop renal complications after AAA repair.

Main Methods:

• Retrospective analysis of 656 patients who underwent AAA surgery.
• Identification of patients who developed postoperative renal failure (81 patients, 12%).
• Comparison of mortality and survival data between groups based on renal complication status and dialysis management.

Main Results:

• Postoperative renal failure occurred in 12% of patients (81/656).
• Ruptured AAA patients experienced preoperative hypotension/shock (88%), unlike elective cases.
• Thirty-day mortality was 58% (47/81) in patients with renal failure; no significant difference in mortality between dialysis and non-dialysis groups.
• Long-term survival for surviving patients was comparable to those without renal complications.

Conclusions:

• Postoperative renal failure is a critical complication of AAA surgery with high early mortality.
• Dialysis management did not significantly alter mortality compared to non-dialysis management in this cohort.
• Patients surviving the immediate postoperative period after developing renal failure have a favorable long-term prognosis.