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J Thorac Cardiovasc Surg 2004;128:233-237
© 2004 The American Association for Thoracic Surgery
Cardiopulmonary support and physiology |
a Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Missouri Baptist Medical Center, St Louis, Mo, USA
Received for publication August 25, 2003; revisions received November 27, 2003; accepted for publication December 12, 2003.
* Address for reprints: Nicholas T. Kouchoukos, MD, Missouri Baptist Medical Center, Suite 266 C, 3009 N Ballas Rd, St Louis, MO 63131, USA
NTKouch{at}aol.com
BACKGROUND: Total replacement of the aortic arch is commonly performed with either antegrade perfusion of the brachiocephalic arteries by means of direct cannulation or with an interval of hypothermic circulatory arrest of at least 30 to 40 minutes. We present a technique with a branched graft that uses antegrade brain perfusion without the need for direct cannulation of the brachiocephalic arteries or a separate perfusion circuit, with only a brief period of circulatory arrest of the brain.
METHODS: Twelve patients underwent resection of the aortic arch through either a midline sternotomy (4 patients) or a bilateral anterior thoracotomy (8 patients). The right axillary artery was used for arterial return and for brain perfusion. After establishing hypothermic circulatory arrest, the brachiocephalic arteries were detached from the aorta, flushed, and occluded with clamps. Hypothermic perfusion of the brain was established through the right axillary artery, and the brachiocephalic arteries were sequentially attached to the limbs of a branched aortic graft. Flow to the brain was then established in the antegrade direction through the axillary artery.
RESULTS: The mean duration of circulatory arrest of the brain at a mean nasopharyngeal temperature of 16°C was 8.8 minutes (range, 6-13 minutes). The subsequent period of hypothermic (20°C-22°C) brain perfusion, during which the 3 branches of the graft were attached to the brachiocephalic arteries, averaged 35 minutes (range, 23-44 minutes). All the patients survived the procedure and were discharged from the hospital. No patient sustained a permanent neurologic deficit. One patient had lethargy for 2 days, with full recovery. Nine of the 12 patients were extubated within 72 hours.
CONCLUSIONS: This technique obviates the need for direct cannulation of the brachiocephalic arteries and for a separate perfusion circuit and requires only a brief period of circulatory arrest of the brain.
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