Perfusion techniques for renal protection during thoracoabdominal aortic surgery

Area of Science:

• Cardiovascular Surgery
• Nephrology
• Vascular Surgery

Background:

• Open thoracoabdominal aortic aneurysm (TAAA) repair involves aortic clamping, risking kidney ischemia and subsequent renal failure.
• Effective renal protection strategies are vital to mitigate adverse outcomes during TAAA surgery.

Purpose of the Study:

• To review and discuss various renal perfusion strategies for kidney protection during TAAA repair.
• To highlight the technical aspects and benefits of cold crystalloid renal perfusion.

Main Methods:

• Review of existing literature on renal perfusion techniques during TAAA repair.
• Discussion of passive shunts, mechanical circulatory support, and cold crystalloid perfusion.
• Emphasis on clinical evidence supporting cold crystalloid perfusion in high-risk patients.

Main Results:

• Cold crystalloid renal perfusion demonstrates excellent protection, particularly in high-risk patients.
• Patients with renal artery occlusive disease, preoperative renal dysfunction, or ruptured aneurysms benefit significantly.
• Recent guidelines recommend cold crystalloid or blood perfusion for renal protection.

Conclusions:

• Cold crystalloid renal perfusion is a preferred and effective method for renal protection during TAAA repair.
• This strategy is particularly valuable for high-risk surgical candidates.
• Further technical discussion of these protective measures is warranted.