7 September 1994 Investigation of possible mechanism of laser welding between artificial film and bronchial tissue
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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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Koji Sensaki, Koji Sensaki, Tsunenori Arai, Tsunenori Arai, Susumu Tanaka, Susumu Tanaka, } "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); doi: 10.1117/12.184937; https://doi.org/10.1117/12.184937
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