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Proceedings Paper

Preliminary experience with laser reinforcement of vascular anastomoses
Author(s): Mehmet Cengiz Oz; Lawrence S. Bass; Matthew R. Williams; Alan I. Benvenisty; Mark A. Hardy; Steven K. Libutti; Alexander Mellon Eaton; Michael R. Treat; Roman Nowygrod
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Paper Abstract

Laser tissue soldering techniques allow reinforcement of sutured repairs and may be a useful adjunct in reducing anastomotic bleeding. Initial results of our clinical trial with laser solder reinforcement are reported. Twenty-one patients underwent standard polytetraflouroethylene (PTFE) graft arteriovenous fistula (AVF) creation. In 11 patients thrombin soaked gelatin sponges were placed around the anastomoses and in 10 laser reinforcement was accomplished. Three lasers were used: KTP (532 nm, power density 4.1 W/cm2, spot size .5 cm), CO2 (10,600 nm, power density 14.1 W/cm2, spot size .3 cm), and diode (805 nm, power density 9.6 W/cm2, spot size .2 cm). The solder consisting of 0.4 cc hyaluronate, 0.2 cc albumin, and 3 drops of the appropriate laser enhancing dye (fluorescein for KTP, indocyanine green for the diode, water for CO2) was applied to the target tissues prior to laser exposure. The laser was directed over the tissue in a sweeping motion until the solder had desiccated. Several lessons are evident from our experience. First, over exposure to the laser results in solder charring and ineffective reinforcement. Greater laser exposure with less undesired solder damage is achieved if dye is added to the solder. Second, the solder should be spread over the target in a thin layer to facilitate controlled desiccation and tissue bonding. Additional layers can be applied as required. Although improvements in the solder and laser technique are required, these early results demonstrate a potential clinical use for laser soldered reinforcement during vascular anastomoses.

Paper Details

Date Published: 1 June 1991
PDF: 4 pages
Proc. SPIE 1422, Lasers in Dermatology and Tissue Welding, (1 June 1991); doi: 10.1117/12.43953
Show Author Affiliations
Mehmet Cengiz Oz, Columbia Univ. College of Physicians and Surgeons (United States)
Lawrence S. Bass, Columbia Univ. College of Physicians and Surgeons (United States)
Matthew R. Williams, Columbia Univ. College of Physicians and Surgeons (United States)
Alan I. Benvenisty, Columbia Univ. College of Physicians and Surgeons (United States)
Mark A. Hardy, Columbia Univ. College of Physicians and Surgeons (United States)
Steven K. Libutti, Columbia Univ. College of Physicians and Surgeons (United States)
Alexander Mellon Eaton, Columbia Univ. College of Physicians and Surgeons (United States)
Michael R. Treat, Columbia Univ. College of Physicians and Surgeons (United States)
Roman Nowygrod, Columbia Univ. College of Physicians and Surgeons (United States)


Published in SPIE Proceedings Vol. 1422:
Lasers in Dermatology and Tissue Welding
Oon Tian Tan; Rodney A. White; John V. White, Editor(s)

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