Investigation of possible mechanism of laser welding between artificial film and bronchial tissue

Koji Sensaki M.D.; Tsunenori Arai; Susumu Tanaka M.D.

doi:10.1117/12.184937

7 September 1994 Investigation of possible mechanism of laser welding between artificial film and bronchial tissue

Koji Sensaki M.D., Tsunenori Arai, Susumu Tanaka M.D.

Author Affiliations +

Proceedings Volume 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV; (1994) https://doi.org/10.1117/12.184937
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

The mechanism of laser welding between artificial film and airway epithelium was investigated. An expanded-polytetrafluoroethylene (e-PTFE) patch (200 micrometers in thickness) was welded to exised canine trachea using carbon monoxide laser (wavelength 5.4 micrometers ) with contact irradiation method. The power density at the tip of the laser fiber cable was 300 W/cm² and irradiation time was five seconds. This method was designed for closure of a postoperative bronchopleural fistula via a bronchoscope using laser tissue welding. The welded contact surfaces of the patch and the tissue were examined with scanning electron microscope. The surface of e-PTFE showed porous structure. And welded surface of the tissue revealed multiple process. The porous structure of the e-PTFE patch and process of the tracheal epithelium coincided with size. The evidence of its remodeling as cast of the patch surface proved. Strings of e-PTFE fibrils were also recognized among the process. The mechanical anchoring effect was considered as a possible mechanism of laser patch welding of e-PTFE and bronchial epithelium.

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Koji Sensaki M.D., Tsunenori Arai, and Susumu Tanaka M.D. "Investigation of possible mechanism of laser welding between artificial film and bronchial tissue", Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); https://doi.org/10.1117/12.184937

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