J T Tang1, G Godlewski, S Rouy. 1. Laboratoire d'Anatomie Expérimentale, Faculté de Médecine Montpellier-Nîmes, Université de Montpellier I, Nîmes, France.
Abstract
OBJECTIVE: The process of aneurysm formation after laser welding is described. SUMMARY BACKGROUND DATA: The mechanism of aneurysm formation after laser-assisted microarterial anastomosis is presently unclear. METHODS: A series of 830-nm diode-laser-assisted longitudinal aortorrhophy with a condition of 400 to 500 J/mm2 for 1 cm length of anastomosis versus conventional manual anastomoses were performed in 90 Wistar rats. To compare this technique with normal media process, a histologic examination of aneurysm formation was conducted. RESULTS AND CONCLUSIONS: The results show that there are two important factors that cause aneurysm formation after laser-assisted anastomosis: 1) the vessel wall is damaged by laser heating; 2) proliferation of collagen fiber at the adventitia is absent during media reconstruction.
OBJECTIVE: The process of aneurysm formation after laser welding is described. SUMMARY BACKGROUND DATA: The mechanism of aneurysm formation after laser-assisted microarterial anastomosis is presently unclear. METHODS: A series of 830-nm diode-laser-assisted longitudinal aortorrhophy with a condition of 400 to 500 J/mm2 for 1 cm length of anastomosis versus conventional manual anastomoses were performed in 90 Wistar rats. To compare this technique with normal media process, a histologic examination of aneurysm formation was conducted. RESULTS AND CONCLUSIONS: The results show that there are two important factors that cause aneurysm formation after laser-assisted anastomosis: 1) the vessel wall is damaged by laser heating; 2) proliferation of collagen fiber at the adventitia is absent during media reconstruction.