A modified technique of atriofemoral bypass for visceral and distal aorticperfusion in thoracoabdominal aortic surgery

Modified atriofemoral bypass (AFB) was used for repair of thoracoabdominal aortic aneurysms (TAAA). The primary circuit consisted of a centrifugal pum p and heat exchanger to perfuse and warm the systemic circulation. A parall el secondary circuit with a second heat exchanger perfused the viscera with cold blood. A progressive sequential cross-clamping technique was used. Th is technique offers theoretical hemodynamic and metabolic advantages and ma y prove to be useful in preventing ischemic and reperfusion injury to the s pinal cord and kidneys.