Observation of cavitation bubbles in monoleaflet mechanical heart valves
Recently, cavitation on the surface of mechanical heart valves (MHVs) has been studied as a cause of fractures occurring in implanted MHVs. In the present study, we investigated the mechanism of MHV cavitation associated with the Björk-Shiley valve and the Medtronic Hall valve in an electrohydraulic...
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| Veröffentlicht in: | Journal of artificial organs 2004-09, Vol.7 (3), p.121-127 |
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| creator | Lee, Hwansung Tsukiya, Tomonori Homma, Akihiko Kamimura, Tadayuki Takewa, Yoshiaki Tatsumi, Eisuke Taenaka, Yoshiyuki Takano, Hisateru Kitamura, Soichiro |
| description | Recently, cavitation on the surface of mechanical heart valves (MHVs) has been studied as a cause of fractures occurring in implanted MHVs. In the present study, we investigated the mechanism of MHV cavitation associated with the Björk-Shiley valve and the Medtronic Hall valve in an electrohydraulic total artificial heart (EHTAH). The valves were mounted in the mitral position in the EHTAH. The valve closing motion, pressure drop measurements, and cavitation capture were employed to investigate the mechanisms for cavitation in the MHV. There are no differences in valve closing velocity between the two valves, and its value ranged from 0.53 to 1.96 m/s. The magnitude of negative pressure increased with an increase in the heart rate, and the negative pressure in the Medtronic Hall valve was greater than that in the Björk-Shiley valve. Cavitation bubbles were concentrated at the edge of the valve stop; the major cause of these cavitation bubbles was determined to be the squeeze flow. The formation of cavitation bubbles depended on the valve closing velocity and the valve leaflet geometry. From the viewpoint of squeeze flow, the Björk-Shiley valve was less likely to cause blood cell damage than the Medtronic Hall valve in our EHTAH. |
| doi_str_mv | 10.1007/s10047-004-0258-8 |
| format | Article |
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In the present study, we investigated the mechanism of MHV cavitation associated with the Björk-Shiley valve and the Medtronic Hall valve in an electrohydraulic total artificial heart (EHTAH). The valves were mounted in the mitral position in the EHTAH. The valve closing motion, pressure drop measurements, and cavitation capture were employed to investigate the mechanisms for cavitation in the MHV. There are no differences in valve closing velocity between the two valves, and its value ranged from 0.53 to 1.96 m/s. The magnitude of negative pressure increased with an increase in the heart rate, and the negative pressure in the Medtronic Hall valve was greater than that in the Björk-Shiley valve. Cavitation bubbles were concentrated at the edge of the valve stop; the major cause of these cavitation bubbles was determined to be the squeeze flow. The formation of cavitation bubbles depended on the valve closing velocity and the valve leaflet geometry. From the viewpoint of squeeze flow, the Björk-Shiley valve was less likely to cause blood cell damage than the Medtronic Hall valve in our EHTAH.</description><identifier>ISSN: 1434-7229</identifier><identifier>EISSN: 1619-0904</identifier><identifier>DOI: 10.1007/s10047-004-0258-8</identifier><identifier>PMID: 15558332</identifier><language>eng</language><publisher>Japan: Springer Nature B.V</publisher><subject>Bubbles ; Cavitation ; Equipment Failure Analysis ; Heart Rate ; Heart Valve Prosthesis - adverse effects ; Humans ; Regional Blood Flow ; Studies ; Valves</subject><ispartof>Journal of artificial organs, 2004-09, Vol.7 (3), p.121-127</ispartof><rights>The Japanese Society for Artificial Organs 2004</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c326t-f8a95b5f1eee75024613b33f862117ca1c66e3a2537bc36449e72769f44d3af13</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,778,782,27907,27908</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15558332$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lee, Hwansung</creatorcontrib><creatorcontrib>Tsukiya, Tomonori</creatorcontrib><creatorcontrib>Homma, Akihiko</creatorcontrib><creatorcontrib>Kamimura, Tadayuki</creatorcontrib><creatorcontrib>Takewa, Yoshiaki</creatorcontrib><creatorcontrib>Tatsumi, Eisuke</creatorcontrib><creatorcontrib>Taenaka, Yoshiyuki</creatorcontrib><creatorcontrib>Takano, Hisateru</creatorcontrib><creatorcontrib>Kitamura, Soichiro</creatorcontrib><title>Observation of cavitation bubbles in monoleaflet mechanical heart valves</title><title>Journal of artificial organs</title><addtitle>J Artif Organs</addtitle><description>Recently, cavitation on the surface of mechanical heart valves (MHVs) has been studied as a cause of fractures occurring in implanted MHVs. In the present study, we investigated the mechanism of MHV cavitation associated with the Björk-Shiley valve and the Medtronic Hall valve in an electrohydraulic total artificial heart (EHTAH). The valves were mounted in the mitral position in the EHTAH. The valve closing motion, pressure drop measurements, and cavitation capture were employed to investigate the mechanisms for cavitation in the MHV. There are no differences in valve closing velocity between the two valves, and its value ranged from 0.53 to 1.96 m/s. The magnitude of negative pressure increased with an increase in the heart rate, and the negative pressure in the Medtronic Hall valve was greater than that in the Björk-Shiley valve. Cavitation bubbles were concentrated at the edge of the valve stop; the major cause of these cavitation bubbles was determined to be the squeeze flow. The formation of cavitation bubbles depended on the valve closing velocity and the valve leaflet geometry. From the viewpoint of squeeze flow, the Björk-Shiley valve was less likely to cause blood cell damage than the Medtronic Hall valve in our EHTAH.</description><subject>Bubbles</subject><subject>Cavitation</subject><subject>Equipment Failure Analysis</subject><subject>Heart Rate</subject><subject>Heart Valve Prosthesis - adverse effects</subject><subject>Humans</subject><subject>Regional Blood Flow</subject><subject>Studies</subject><subject>Valves</subject><issn>1434-7229</issn><issn>1619-0904</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNqFkU1LA0EMhgdRbK3-AC-yIHhbncznzlGKWqHQi56H2WmGbtmPurNb8N87pQXBi5c3CTxJSF5CboE-AqX6KSYVOk-SUyaLvDgjU1BgcmqoOE-54CLXjJkJuYpxSyloqeklmYCUsuCcTcliVUbs926oujbrQubdvhqOVTmWZY0xq9qs6dquRhdqHLIG_ca1lXd1tkHXD9ne1XuM1-QiuDrizSnOyOfry8d8kS9Xb-_z52XuOVNDHgpnZCkDIKKWlAkFvOQ8FIoBaO_AK4XcMcl16bkSwqBmWpkgxJq7AHxGHo5zd333NWIcbFNFj3XtWuzGaJWmxkjD_gVBM1OkNQm8_wNuu7Fv0xEWALgAzqVKFBwp33cx9hjsrq8a139boPbghj26YZPYgxu2SD13p8lj2eD6t-P0fv4DEkKDwA</recordid><startdate>200409</startdate><enddate>200409</enddate><creator>Lee, Hwansung</creator><creator>Tsukiya, Tomonori</creator><creator>Homma, Akihiko</creator><creator>Kamimura, Tadayuki</creator><creator>Takewa, Yoshiaki</creator><creator>Tatsumi, Eisuke</creator><creator>Taenaka, Yoshiyuki</creator><creator>Takano, Hisateru</creator><creator>Kitamura, Soichiro</creator><general>Springer Nature B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QO</scope><scope>7RV</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB0</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M7P</scope><scope>NAPCQ</scope><scope>P5Z</scope><scope>P62</scope><scope>P64</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope></search><sort><creationdate>200409</creationdate><title>Observation of cavitation bubbles in monoleaflet mechanical heart valves</title><author>Lee, Hwansung ; 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In the present study, we investigated the mechanism of MHV cavitation associated with the Björk-Shiley valve and the Medtronic Hall valve in an electrohydraulic total artificial heart (EHTAH). The valves were mounted in the mitral position in the EHTAH. The valve closing motion, pressure drop measurements, and cavitation capture were employed to investigate the mechanisms for cavitation in the MHV. There are no differences in valve closing velocity between the two valves, and its value ranged from 0.53 to 1.96 m/s. The magnitude of negative pressure increased with an increase in the heart rate, and the negative pressure in the Medtronic Hall valve was greater than that in the Björk-Shiley valve. Cavitation bubbles were concentrated at the edge of the valve stop; the major cause of these cavitation bubbles was determined to be the squeeze flow. The formation of cavitation bubbles depended on the valve closing velocity and the valve leaflet geometry. From the viewpoint of squeeze flow, the Björk-Shiley valve was less likely to cause blood cell damage than the Medtronic Hall valve in our EHTAH.</abstract><cop>Japan</cop><pub>Springer Nature B.V</pub><pmid>15558332</pmid><doi>10.1007/s10047-004-0258-8</doi><tpages>7</tpages></addata></record> |
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| ispartof | Journal of artificial organs, 2004-09, Vol.7 (3), p.121-127 |
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| language | eng |
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| source | MEDLINE; Springer Nature - Complete Springer Journals |
| subjects | Bubbles Cavitation Equipment Failure Analysis Heart Rate Heart Valve Prosthesis - adverse effects Humans Regional Blood Flow Studies Valves |
| title | Observation of cavitation bubbles in monoleaflet mechanical heart valves |
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