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Ann Thorac Surg 1998;65:1093-1099
© 1998 The Society of Thoracic Surgeons
a Heart Lung Institute, Department of Cardiology, Utrecht University Hospital, Utrecht, the Netherlands
Accepted for publication December 2, 1997.
Address reprint requests to Dr Borst, Department of Cardiology, Heart Lung Institute, Utrecht University Hospital, Rm G02.523, PO Box 85500, 3508 GA Utrecht, the Netherlands
e-mail: (exp.cardio{at}hli.azu.nl)
Presented at the Seventieth Scientific Sessions of the American Heart Association, Orlando, FL, Nov 912, 1997.
Background. To enable off-pump coronary operations in a bloodless surgical field without ischemic complications, we developed and assessed a temporary luminal arteriotomy seal in a porcine carotid artery bypass graft model.
Methods. In 16 consecutive pigs (25 kg, 32 anastomoses) the arteriotomy was sealed luminally by a polyurethane elliptic convex seal. Endothelial denudation, medial necrosis, and intimal hyperplasia were measured quantitatively and compared with those seen in conventionally sutured anastomoses.
Results. The median occlusive time upon insertion or retrieval was 90 and 82 seconds, including the arteriotomy and securing the anastomosis, respectively. Once properly positioned, the seal provided a bloodless arteriotomy in all anastomoses. Microsurgical suturing was performed without leakage of the seal and with unimpeded flow. In the recipient artery, endothelial denudation was limited to one third of its circumference. No medial necrosis was found. Intimal hyperplasia at heel and toe was not significantly different from that seen in conventionally sutured anastomoses.
Conclusions. During end-to-side bypass grafting, the temporary luminal arteriotomy seal provided a bloodless surgical field without interfering with recipient artery blood flow and with minimal damage to the arterial wall.
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