Acute renal failure and open heart surgery.

Area of Science:

• Cardiovascular Surgery
• Nephrology
• Critical Care Medicine

Background:

• Renal failure is a significant complication following open heart operations.
• Understanding risk factors and outcomes is crucial for patient management.

Purpose of the Study:

• To investigate the incidence, mortality, and risk factors associated with renal failure after open heart surgery.
• To evaluate the effectiveness of different dialysis methods for renal failure post-cardiac surgery.

Main Methods:

• Retrospective analysis of 428 open heart operations.
• Comparison of preoperative and postoperative renal function markers.
• Identification of surgical and patient-related risk factors.

Main Results:

• Incidence of mild and severe renal failure was 26% and 4.7%, respectively.
• Mortality rates were 38% (mild) and 70% (severe) renal failure.
• Increased risk associated with perfusion >60 min, perfusion pressure <80 mm Hg, and multiple valve replacements. Preoperative blood urea was significantly higher in patients with renal impairment.
• No correlation found with age, cooling degree, or postoperative blood urea. Diuretics (frusemide, mannitol) showed no influence.

Conclusions:

• Renal failure is common and carries high mortality after open heart surgery.
• Specific surgical parameters significantly increase renal failure risk.
• Peritoneal dialysis is the preferred initial treatment for severe renal failure post-cardiac surgery.