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Proceedings Paper

Application of CO laser for laser balloon angioplasty
Author(s): Akira Miyamoto; Masami Sakurada; Kyoichi Mizuno; Akira Kurita; Haruo Nakamura; Akira Suda; Tsunenori Arai; Makoto Kikuchi
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Paper Abstract

CO laser may be efficient for thermal fusion of intima of arterial wall without adventitial tissue damage because of high tissue absorption. To investigate the efficacy of CO laser as a laser bam for laser balloon angioplasty (LBA). CO laser was irradiated to aortic tissue through 3Oim polyethylene membrane and tissue temperature was measured by a thermistor. At 2Owatt/cm2 200joules/cm2 continuous laser exposure (CE), tissue temperature was above 100°C within a depth of 1mm and rapidly decreased to 60 °C or below between 2 and 3mm in depth. Moreover, adventitial temperature could be decreased by changing duty ratio (exposure duration/interval) of intermittent laser exposure (IE) despite of the same laser energy. Light microscopy showed high degree of medial coagulation necrosis in CE, however thermal coagulation was observed only at the surface of intima of aortic tissue in IE at duty ratio 1 / 2. These findings suggested CO laser could coagulate intimal layer with less deep thermal damage compared to Nd- YAG laser and that IE was better for superficial welding than CE at the same energy. We concluded that CO laser might be more efficient as a laser beam for LBA than Nd-YAG laser.

Paper Details

Date Published: 1 July 1990
PDF: 4 pages
Proc. SPIE 1201, Optical Fibers in Medicine V, (1 July 1990); doi: 10.1117/12.17523
Show Author Affiliations
Akira Miyamoto, National Defense Medical College (Japan)
Masami Sakurada, National Defense Medical College (Japan)
Kyoichi Mizuno, National Defense Medical College (Japan)
Akira Kurita, National Defense Medical College (Japan)
Haruo Nakamura, National Defense Medical College (Japan)
Akira Suda, National Defense Medical College (Japan)
Tsunenori Arai, National Defense Medical College (Japan)
Makoto Kikuchi, National Defense Medical College (Japan)


Published in SPIE Proceedings Vol. 1201:
Optical Fibers in Medicine V
Abraham Katzir, Editor(s)

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