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, Tsunenori Arai, 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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