| Presentation | 1999/6/24 Examination of cavitation threshold inducing surface erosion pitting of mechanical heart valve Hwansung LEE, Nobuki KUDO, Toshiyuki SHIMOOKA, Yoshinori MITAMURA, Toshio YUHTA, Katsuyuki YAMAMOTO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, cavitation on a surface of mechanical heart valves has been studied as a cause of fractures in implanted mechanical heart valves. Several factors such as peak dp/dt of the ventricular pressure and mean closing velocity of leaflet have been studied as an index for the cavitation threshold. In our previous studies, we suggested that disk closing velocity immediately before closing has significant effects on pitting erosion. In the present study, the effects of the disk closing velocity on surface erosion were further studied. The results showed that there is a threshold in the closing velocity inducing erosion cavitation and it was about 0.4 m/s in the mechanical heart valves used in this study. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | mechanical heart valve / surface erosion pitting / cavitation threshold / closing velocity |
| Paper # | MBE99-25 |
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| Conference Information | |
| Committee | MBE |
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| Conference Date | 1999/6/24(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
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| Paper Information | |
| Registration To | ME and Bio Cybernetics (MBE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Examination of cavitation threshold inducing surface erosion pitting of mechanical heart valve |
| Sub Title (in English) | |
| Keyword(1) | mechanical heart valve |
| Keyword(2) | surface erosion pitting |
| Keyword(3) | cavitation threshold |
| Keyword(4) | closing velocity |
| 1st Author's Name | Hwansung LEE |
| 1st Author's Affiliation | Graduate School of Engineering, Hokkaido University() |
| 2nd Author's Name | Nobuki KUDO |
| 2nd Author's Affiliation | Graduate School of Engineering, Hokkaido University |
| 3rd Author's Name | Toshiyuki SHIMOOKA |
| 3rd Author's Affiliation | Graduate School of Engineering, Hokkaido University |
| 4th Author's Name | Yoshinori MITAMURA |
| 4th Author's Affiliation | Graduate School of Engineering, Hokkaido University |
| 5th Author's Name | Toshio YUHTA |
| 5th Author's Affiliation | Tokyo Denki University |
| 6th Author's Name | Katsuyuki YAMAMOTO |
| 6th Author's Affiliation | Graduate School of Engineering, Hokkaido University |
| Date | 1999/6/24 |
| Paper # | MBE99-25 |
| Volume (vol) | vol.99 |
| Number (no) | 138 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |