Perioperative renal dysfunction and cardiovascular anesthesia: concerns and controversies

Area of Science:

• Nephrology
• Cardiovascular Surgery
• Critical Care Medicine

Background:

• Perioperative management of patients with renal disease undergoing cardiovascular surgery presents significant challenges.
• Early recognition of compensatory changes is critical for preventing acute renal failure (ARF).
• Maintaining renal oxygen supply-demand balance is key to preventing ischemic renal failure.

Purpose of the Study:

• To review current strategies for preventing and treating perioperative acute renal failure.
• To evaluate the efficacy of novel therapeutic agents and advancements in dialysis technology.

Main Methods:

• Review of existing literature on perioperative ARF management.
• Analysis of studies on pharmacologic interventions (e.g., norepinephrine, dopamine, atrial natriuretic peptide, growth factors).
• Examination of improvements in dialysis technology (e.g., biocompatible membranes, bicarbonate buffering).

Main Results:

• Norepinephrine may not have deleterious renal effects in patients with low systemic vascular resistance.
• Atrial natriuretic peptide showed potential benefit in patients with oliguric renal failure, reducing dialysis requirements.
• Low-dose dopamine did not show benefit in ARF prophylaxis in a trial for abdominal aortic aneurysm repair.
• Epidermal growth factor enhanced tubular regeneration in animal models of ischemic ARF.
• Modern dialysis technology offers improved cardiovascular stability, hemodynamic regulation, and reduced complications.

Conclusions:

• Therapeutic interventions for perioperative ARF are evolving, with atrial natriuretic peptide showing promise.
• Advancements in dialysis technology, including biocompatible membranes, improve patient outcomes.
• Further research is needed to determine the long-term impact of early and frequent dialysis and other interventions on survival in perioperative ARF.