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Eur J Cardiothorac Surg 2000;18:162-167
© 2000 Elsevier Science NL
Texas Heart Institute at St. Luke's Episcopal Hospital, P.O. Box 20345, MC 3-258, Houston, TX 77225-0345, USA
Received 7 September 1999; received in revised form 18 January 2000; accepted 23 May 2000.
Corresponding author. Tel.: +1-713-791-4932; fax: +1-713-791-3424
Objective: To determine the efficacy of a single-clamp technique in preventing spinal cord ischemia during repair of aneurysms of the descending thoracic aorta. Patients and methods: From January 1989 to May 1999, 132 consecutive patients (91 men and 41 women, aged 31–86 years), with aneurysms of the descending thoracic aorta underwent repair using a single-clamp technique and temporary partial distal exsanguination. The diseased aortic segment was replaced with a Dacron graft. Blood was re-infused from an auto-transfusion device, and the segmental vessels were over-sewn but not implanted into the graft. Results: The average aortic cross-clamp time was 26.4 min (range, 11–67 min) for the overall group and 37.4 min for patients who had spinal cord complications. An average of 2066 ml of blood was auto-transfused (range, 450–6100 ml). During the first 30 postoperative days, 17 patients (12.9 %) died. Eleven patients (8.3%) had spinal cord dysfunction, six patients (4.5%) had lower-extremity paraparesis, and five patients (3.8%) had paraplegia. Nine patients (6.8%) had renal failure necessitating hemodialysis. Other complications included bleeding in 15 cases (11.4%), respiratory failure in 12 cases (9.1%), wound-related sequelae in five cases (3.8%), distal embolism in five cases (3.8%), and bowel ischemia in two cases (1.5%). Conclusion: The single-clamp technique yielded an acceptable complication rate, and the mortality was comparable to that seen after the use of more complex methods. For satisfactory results, the cross-clamp time should not exceed 30 min.
Key Words: Aneurysm • Aorta, descending thoracic • Single-clamp technique • Aortic cross-clamping • Spinal cord protection
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