Final answer:
An early complication of Abdominal Aortic Aneurysm (AAA) repair is often reperfusion injury, which can lead to acute renal failure as restored blood flow brings inflammatory and oxidative damage to tissues.
Step-by-step explanation:
An early complication of Abdominal Aortic Aneurysm (AAA) repair is often reperfusion injury. When blood flow is restored to a region after a period of ischemia or lack of oxygen due to an obstruction, tissue damage can occur in the form of reperfusion injury. This occurs because the return of blood brings with it inflammatory components and oxidative species that may cause further damage to the tissues. Reperfusion injury can lead to other complications as well, including acute renal failure where the kidneys are unable to function effectively post-operatively.
It is important to note conditions like hepatorenal syndrome and atheroembolic disease also contribute to renal perfusion issues but are separate from the reperfusion injury mechanism seen post-AAA repair. Additionally, although infection and hemorrhage are potential complications of any surgical procedure, reperfusion injury is a more common and specific early complication associated with AAA repair.