Effect of optical temperature feedback control on patency in laser-soldered microvascular anastomosis

Journal of Reconstructive Microsurgery
D PohlD T Chiu

Abstract

Feedback control has been postulated to improve the efficacy of laser welding in microsurgery, but alteration of outcome has not been clearly shown. The authors evaluated the ability of an optical closed loop temperature feedback control to improve patency, aneurysm rate, and to histologically limit thermal damage. Rat femoral artery anastomoses were performed under operating microscope magnification. One hundred and twenty-four anastomoses were performed in five groups using 1) free-hand (FH) 1.9-microm laser soldering without feedback; 2) temperature controlled (TC) 1.9-microm laser soldering with optical feedback; 3) FH 808 nm laser; 4) TC 808 nm laser soldering; and 5) 10-0 nylon suture control. In Groups 2 and 4, an optical feedback system controlling laser exposure to produce a preset temperature was used. Anastomotic time was significantly less for all laser groups (p < 0.05). Late patency for all 1.9-microm laser anastomoses was almost 0. Temperature controlled 808-nm anastomoses showed no significant difference from sutures in terms of patency (88 percent vs. 96 percent), bursting pressure, and aneurysm rate, while freehand 808-nm anastomoses had a significantly lower patency (71 percent) and more tissue damage (ANOVA,...Continue Reading

Citations

Feb 3, 2005·Photomedicine and Laser Surgery·Daniel LevanonAvi Ravid
Oct 8, 2011·International Journal of Nanomedicine·Eva K SchlachterMichael Reinert
Apr 13, 2005·Otolaryngologic Clinics of North America·Stephen T Flock, Kevin S Marchitto
Jul 1, 1999·Journal of Biomedical Optics·I C Ilesiz
Jul 19, 2002·Lasers in Surgery and Medicine·Robert B StewartRobert T V Kung
Oct 27, 2007·Lasers in Surgery and Medicine·Anne C O'NeillRobert W Redmond
Nov 22, 2008·Journal of Biomedical Optics·Ingrid C D Y M Wolf-de JongeJohan F Beek

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