[Diabetic nephropathy and heart surgery--prevention of perioperative acute renal failure]

Area of Science:

• Cardiology and Nephrology
• Diabetic Complications and Cardiovascular Surgery

Background:

• Diabetic micro- and macroangiopathy contribute to significant complications like retinopathy, nephropathy, peripheral arteriosclerosis, and coronary heart disease.
• Diabetic patients with comorbidities such as nephropathy and peripheral arteriosclerosis exhibit the highest mortality rates following heart surgery.
• Long-term survival is superior after coronary artery bypass grafting compared to percutaneous coronary intervention with or without stenting.

Purpose of the Study:

• To outline recommendations for preventing acute renal failure in diabetic patients undergoing heart surgery.
• To highlight the importance of pre-operative assessment and intra-operative management for renal protection.

Main Methods:

• Pre-operative assessment of renal damage using creatinine clearance, albuminuria, and blood pressure.
• Tight control of volume status (central venous pressure, central venous oxygen saturation) starting 12 hours pre-surgery.
• Management strategies including avoiding nephrotoxic substances and early initiation of renal replacement therapy.

Main Results:

• Off-pump surgery is associated with a lower incidence of acute renal failure compared to on-pump surgery.
• Specific recommendations are provided for managing volume status and medication use to mitigate renal risk.
• Early and effective renal replacement therapy (hemodialysis, hemofiltration, hemodiafiltration) is crucial for high-risk patients.

Conclusions:

• Proactive renal protection strategies are essential for improving outcomes in diabetic patients undergoing heart surgery.
• Pre-operative evaluation, meticulous intra-operative management, and timely renal support can significantly reduce the incidence of acute kidney injury.