Mechanism of aneurysm formation after 830-nm diode-laser-assisted microarterial anastomosis.
OBJECTIVE
The process of aneurysm formation after laser welding is described.


BACKGROUND
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.


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.
Tang
J T
JT
Laboratoire d'Anatomie Expérimentale, Faculté de Médecine Montpellier-Nîmes, Université de Montpellier I, Nîmes, France.
Godlewski
G
G
Rouy
S
S
D000714:Anastomosis, Surgical / Q000009:adverse effects* / Q000295:instrumentation / Q000379:methods; D000818:Animals; D001011:Aorta / Q000473:pathology / Q000502:physiology / Q000601:surgery; D001014:Aortic Aneurysm / Q000209:etiology* / Q000473:pathology; D016009:Chi-Square Distribution; D003094:Collagen / Q000502:physiology; D004547:Elastic Tissue / Q000502:physiology; D017075:Laser Coagulation / Q000009:adverse effects*; D008833:Microcirculation; D008866:Microsurgery / Q000009:adverse effects / Q000379:methods; D051381:Rats; D017208:Rats, Wistar; D014945:Wound Healing / Q000502:physiology
D003094:Collagen