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Proceedings Paper

Development for medical surgical system with function variability and flexible delivery using dual-wavelength infrared fiber laser
Author(s): Kyota Naruse; Tsunenori Arai; Satoko Kawauchi; Tetsumi Sumiyoshi; Shoichi Kiyoshima; Miya Ishihara; Shunichi Sato; Makoto Kikuchi; Hitoshi Sekita; Minoru Obara
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Paper Abstract

We developed a medical surgical system with function variability and flexible delivery of dual-wavelength infrared fiber laser that simultaneously oscillated 3 and 2 micrometers radiation. We studied the function variability (cutting/coagulation) of this fiber laser using a specially designed filter which contained two adjacent areas with different transmission for 2 micrometers radiation. When the power of 3 micrometers radiation was set to 0.6 W and the power of 2 micrometers radiation was changed from 0 W to 0.77 W using this filter at the beam traveling speed of 0.25 mm/s, the cutting groove formed in myocardium tissue increased from 0.80 mm to 0.89 mm and the coagulation layer thickness increased from 0.41 mm to 0.85 mm. We successfully developed a filter system that could continuously control coagulation layer thickness with cutting capability constant. We studied a flexible beam delivery using a single crystal sapphire fiber. The transmission efficiency per meter for 3 and 2 micrometers radiation using a 200-micrometers core-diameter sapphire fiber was 58.0% and 60.4%, respectively. The bending loss at 3-cm loop radius was 5.6%. The high flexibility and low bending loss of the sapphire fiber might make it possible to apply the dual-wavelength infrared fiber laser to endoscopic treatment. In summary, these results may encourage the possibility for practical use of the fiber laser.

Paper Details

Date Published: 27 June 2002
PDF: 7 pages
Proc. SPIE 4617, Laser Tissue Interaction XIII: Photochemical, Photothermal, and Photomechanical, (27 June 2002); doi: 10.1117/12.472515
Show Author Affiliations
Kyota Naruse, Keio Univ. (Japan)
Tsunenori Arai, National Defense Medical College (Japan)
Satoko Kawauchi, National Defense Medical College (Japan)
Tetsumi Sumiyoshi, Cyber Laser Inc. (Japan)
Shoichi Kiyoshima, Computational Mechanics, Inc. (Japan)
Miya Ishihara, National Defense Medical College (Japan)
Shunichi Sato, National Defense Medical College (Japan)
Makoto Kikuchi, National Defense Medical College (Japan)
Hitoshi Sekita, Cyber Laser Inc. (Japan)
Minoru Obara, Keio Univ. (Japan)

Published in SPIE Proceedings Vol. 4617:
Laser Tissue Interaction XIII: Photochemical, Photothermal, and Photomechanical
Steven L. Jacques; Donald Dean Duncan; Donald Dean Duncan; Sean J. Kirkpatrick; Sean J. Kirkpatrick; Andres Kriete; Andres Kriete, Editor(s)

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