| Project/Area Number |
02454327
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Thoracic surgery
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
OKAMOTO Yoshifumi Kyoto University Medical Associate Professor, 医学部, 助教授 (80116392)
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| Co-Investigator(Kenkyū-buntansha) |
OGINO Hitoshi Kyoto Univ. Medical Researcher, 医学部, 研究生
AWAZU Atsushi Kyoto Univ. Medical Researcher, 医学部, 研究生
KOBAYASHI Akira Kyoto Univ. Medical Researcher, 医学部, 研究生
荻野 均 京都大学, 医学部, 研究生
伴 敏彦 京都大学, 医学部, 教授 (00173120)
岡林 均 京都大学, 医学部, 助手 (10204009)
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| Project Period (FY) |
1990 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 1992: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1991: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1990: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | Erbium-YAG / laser / laser fiber / Zirconium-Fglass / coronal angioplasty / マルチファイバ-システム / ロングパルスエキシマレ-ザ- / 動脈狭窄性病変 / アテロ-ム蒸散 / ErーYAGレ-ザ- / Angioplasty / 動脈硬病変 / エキシマレ-ザ- |
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| Research Abstract |
Result of developments of Er-YAG laser and its delivery system were reported. Er-YAG laser's wavelength is 2.94 mu m, the beam absorption rate by water is higher than other laser beam. Er-YAG laser beam is expected different effect for a biotissue. Er-YAG laser has repeated pulse oscillation, pulse width is 240 mu, sec, the repeat frequency is between 5 to 10 pulse per second. The mean power is 4w maximum, 10pps.
The fiber's of laser are made of zirconium-F-glass.
We carried out a study on the possible application of the Er-YAG laser on the rabbit arteries and myocardium and human arteries were examined in vitro. Very clear cuts were observed on the histological examination. There were no evidence of thermal damage, no carbonization on the sharp catting surface. Experimental result showed that Er-YAG lasers had good potential for angioplastic laser.
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