1992 Fiscal Year Final Research Report Summary
Development of Er-YAG laser for laser angioplasty
| 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
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| Project Period (FY) |
1990 – 1992
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| Keywords | Erbium-YAG / laser / laser fiber / Zirconium-Fglass / coronal angioplasty |
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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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