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Proceedings Paper

Improved laser-assisted vascular tissue fusion using solder-doped polymer membranes on a canine model
Author(s): Karen M. McNally-Heintzelman; Brian S. Sorg; Daniel X. Hammer; Douglas L. Heintzelman M.D.; Diane E. Hodges; Ashley J. Welch
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Paper Abstract

Newly developed light-activated surgical adhesives have been investigated as a substitute to traditional protein solders for vascular tissue fusion without the need for sutures. Canine femoral arteries (n equals 14), femoral veins (n equals 14) and carotid arteries (n equals 10) were exposed, and a 0.3 to 0.6 cm longitudinal incision was made in the vessel walls. The surgical adhesive, composed of a poly(L-lactic-co-glycolic acid) scaffold doped with the traditional protein solder mix of bovine serum albumin and indocyanine green dye, was used to close the incisions in conjunction with an 805 nm diode laser. Blood flow was restored to the vessels immediately after the procedure and the incision sites were checked for patency. The new adhesives were flexible enough to be wrapped around the vessels while their solid nature avoided the problems associated with 'runaway' of the less viscous liquid protein solders widely used by researchers. Assessment parameters included measurement of the ex vivo intraluminal bursting pressure one to two hours after surgery, as well as histology. The acute intraluminal bursting pressures were significantly higher in the laser-solder group (greater than 300 mmHg) compared to the suture control group (less than 150 mmHg) where four evenly spaced sutures were used to repair the vessel (n equals 4). Histological analysis showed negligible evidence of collateral thermal damage to the underlying tissue in the laser-solder repair group. These initial results indicated that laser-assisted vascular repair using the new adhesives is safe, easy to perform, and contrary to conventional suturing, provides an immediate leak-free closure. In addition, the flexible and moldable nature of the new adhesives should allow them to be tailored to a wide range of tissue geometries, thus greatly improving the clinical applicability of laser-assisted tissue repair.

Paper Details

Date Published: 17 May 2000
PDF: 9 pages
Proc. SPIE 3907, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems X, (17 May 2000); doi: 10.1117/12.386230
Show Author Affiliations
Karen M. McNally-Heintzelman, Rose-Hulman Institute of Technology and Univ. of Texas/Austin (United States)
Brian S. Sorg, Univ. of Texas/Austin (United States)
Daniel X. Hammer, Univ. of Texas/Austin (United States)
Douglas L. Heintzelman M.D., Indiana Univ. School of Medicine (United States)
Diane E. Hodges, Univ. of Texas/Austin (United States)
Ashley J. Welch, Univ. of Texas/Austin (United States)

Published in SPIE Proceedings Vol. 3907:
Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems X
R. Rox Anderson M.D.; Kenton W. Gregory M.D.; Eugene A. Trowers M.D.; David S. Robinson M.D.; Kenneth Eugene Bartels D.V.M.; Lou Reinisch; Reza S. Malek M.D.; C. Gaelyn Garrett M.D.; Lloyd P. Tate V.D.M.; Hans-Dieter Reidenbach; Timothy A. Woodward M.D.; Kenneth Eugene Bartels D.V.M.; Lawrence S. Bass M.D.; George M. Peavy D.V.M.; C. Gaelyn Garrett M.D.; Kenton W. Gregory M.D.; Nikiforos Kollias; Harvey Lui M.D.; Reza S. Malek M.D.; George M. Peavy D.V.M.; Hans-Dieter Reidenbach; Lou Reinisch; David S. Robinson M.D.; Lloyd P. Tate V.D.M.; Eugene A. Trowers M.D.; Timothy A. Woodward M.D., Editor(s)

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