The Baylor Total Artificial Heart: Flow Visualization Studies
To analyze the flow patterns of the left blood chamber of the Baylor total artificial heart (TAH) and to evaluate influences of the inflow valve angle to the flow patterns, flow visualization studies were performed. The inflow valve angle of the left housing was changed by 20 degrees orthogonal to t...
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| Veröffentlicht in: | ASAIO journal (1992) 1994-07, Vol.40 (3), p.M499-M505 |
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| container_title | ASAIO journal (1992) |
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| creator | Orime, Yukihiko Takatani, Setsuo Tasai, Kimitaka Ohara, Yasuhisa Naito, Kozo Mizuguchi, Kazumi Meier, Dirk Wernicke, Jens T Damm, George Glueck, Julie Noon, George P Nosé, Yukihiko |
| description | To analyze the flow patterns of the left blood chamber of the Baylor total artificial heart (TAH) and to evaluate influences of the inflow valve angle to the flow patterns, flow visualization studies were performed. The inflow valve angle of the left housing was changed by 20 degrees orthogonal to the inflow tube, and comparison studies of the modified and unmodified models were made. For evaluating sectional flow patterns, a laser light was used, the clear transparent housing was scanned segmentally, and flow patterns were recorded on high contrast film for measuring flow velocities. A signal was used that synchronized the timing of the camera shutter to the pusher-plate movement signal. With the modified 20 degree inflow valve direction, there were better closing characteristics of the inflow valve leaflets. At the same time, we could successfully reduce the vortex formation at the inflow port, which may cause thrombus formation. We also have improved the washout during the diastolic phase in not only the bottom area, but in the entire pumping chamber. This flow visualization setup is simple and inexpensive. It is useful not only for validation of global flow patterns, but also for validation of local flow velocities of various blood pumps. |
| doi_str_mv | 10.1097/00002480-199407000-00050 |
| format | Article |
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The inflow valve angle of the left housing was changed by 20 degrees orthogonal to the inflow tube, and comparison studies of the modified and unmodified models were made. For evaluating sectional flow patterns, a laser light was used, the clear transparent housing was scanned segmentally, and flow patterns were recorded on high contrast film for measuring flow velocities. A signal was used that synchronized the timing of the camera shutter to the pusher-plate movement signal. With the modified 20 degree inflow valve direction, there were better closing characteristics of the inflow valve leaflets. At the same time, we could successfully reduce the vortex formation at the inflow port, which may cause thrombus formation. We also have improved the washout during the diastolic phase in not only the bottom area, but in the entire pumping chamber. This flow visualization setup is simple and inexpensive. It is useful not only for validation of global flow patterns, but also for validation of local flow velocities of various blood pumps.</description><identifier>ISSN: 1058-2916</identifier><identifier>EISSN: 1538-943X</identifier><identifier>DOI: 10.1097/00002480-199407000-00050</identifier><identifier>PMID: 8555566</identifier><identifier>CODEN: AJOUET</identifier><language>eng</language><publisher>Philadelphia, PA: Amercian Society of Artificial Internal Organs</publisher><subject>Biological and medical sciences ; Biomedical Engineering ; Blood Flow Velocity ; Evaluation Studies as Topic ; Heart, Artificial - adverse effects ; Hemodynamics ; Humans ; In Vitro Techniques ; Medical sciences ; Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects) ; Regional Blood Flow ; Technology. Biomaterials. Equipments. Material. Instrumentation ; Thrombosis - etiology</subject><ispartof>ASAIO journal (1992), 1994-07, Vol.40 (3), p.M499-M505</ispartof><rights>1994Amercian Society of Artificial Internal Organs</rights><rights>1995 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf><![CDATA[$$Uhttp://ovidsp.ovid.com/ovidweb.cgi?T=JS&CSC=Y&NEWS=N&PAGE=fulltext&PDF=y&D=ovft&AN=00002480-199407000-00050$$EPDF$$P50$$Gwolterskluwer$$H]]></linktopdf><linktohtml>$$Uhttp://ovidsp.ovid.com/ovidweb.cgi?T=JS&NEWS=n&CSC=Y&PAGE=fulltext&D=ovft&AN=00002480-199407000-00050$$EHTML$$P50$$Gwolterskluwer$$H</linktohtml><link.rule.ids>315,781,785,4610,27928,27929,64670,65465</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=3559685$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/8555566$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Orime, Yukihiko</creatorcontrib><creatorcontrib>Takatani, Setsuo</creatorcontrib><creatorcontrib>Tasai, Kimitaka</creatorcontrib><creatorcontrib>Ohara, Yasuhisa</creatorcontrib><creatorcontrib>Naito, Kozo</creatorcontrib><creatorcontrib>Mizuguchi, Kazumi</creatorcontrib><creatorcontrib>Meier, Dirk</creatorcontrib><creatorcontrib>Wernicke, Jens T</creatorcontrib><creatorcontrib>Damm, George</creatorcontrib><creatorcontrib>Glueck, Julie</creatorcontrib><creatorcontrib>Noon, George P</creatorcontrib><creatorcontrib>Nosé, Yukihiko</creatorcontrib><title>The Baylor Total Artificial Heart: Flow Visualization Studies</title><title>ASAIO journal (1992)</title><addtitle>ASAIO J</addtitle><description>To analyze the flow patterns of the left blood chamber of the Baylor total artificial heart (TAH) and to evaluate influences of the inflow valve angle to the flow patterns, flow visualization studies were performed. The inflow valve angle of the left housing was changed by 20 degrees orthogonal to the inflow tube, and comparison studies of the modified and unmodified models were made. For evaluating sectional flow patterns, a laser light was used, the clear transparent housing was scanned segmentally, and flow patterns were recorded on high contrast film for measuring flow velocities. A signal was used that synchronized the timing of the camera shutter to the pusher-plate movement signal. With the modified 20 degree inflow valve direction, there were better closing characteristics of the inflow valve leaflets. At the same time, we could successfully reduce the vortex formation at the inflow port, which may cause thrombus formation. We also have improved the washout during the diastolic phase in not only the bottom area, but in the entire pumping chamber. This flow visualization setup is simple and inexpensive. It is useful not only for validation of global flow patterns, but also for validation of local flow velocities of various blood pumps.</description><subject>Biological and medical sciences</subject><subject>Biomedical Engineering</subject><subject>Blood Flow Velocity</subject><subject>Evaluation Studies as Topic</subject><subject>Heart, Artificial - adverse effects</subject><subject>Hemodynamics</subject><subject>Humans</subject><subject>In Vitro Techniques</subject><subject>Medical sciences</subject><subject>Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)</subject><subject>Regional Blood Flow</subject><subject>Technology. Biomaterials. Equipments. Material. Instrumentation</subject><subject>Thrombosis - etiology</subject><issn>1058-2916</issn><issn>1538-943X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1994</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkk1LAzEQhoMofv8EYQ_ibTXZfGwieFCxKggerOItjNsJjaZdTXYp-uuNtvYmHQiZMM9MJvOGkILRY0ZNfUKzVULTkhkjaJ1PZV6SrpFtJrkujeDP69mnUpeVYWqL7KT0SmkOcrZJNrXMptQ2ORuOsbiAz9DGYth2EIrz2HnnG5_dG4TYnRaD0M6KJ596CP4LOt9Oi4euH3lMe2TDQUi4v9h3yePganh5U97dX99ent-VDae5SXTQCNRCg9PaUMSKC60QnalrprUUujZi9MK5aZwcKaxQGVU7DhQAc9N8lxzN677H9qPH1NmJTw2GAFNs-2RzmUpILVeCleKK8VqsBJkyec61yaCeg01sU4ro7Hv0E4ifllH7o4X908IutbC_WuTUg8Ud_csER8vExfBz_HARh9RAcBGmjU9LjEtp1O-bxBybtaHDmN5CP8NoxwihG9v_fgL_Bq_Wntw</recordid><startdate>199407</startdate><enddate>199407</enddate><creator>Orime, Yukihiko</creator><creator>Takatani, Setsuo</creator><creator>Tasai, Kimitaka</creator><creator>Ohara, Yasuhisa</creator><creator>Naito, Kozo</creator><creator>Mizuguchi, Kazumi</creator><creator>Meier, Dirk</creator><creator>Wernicke, Jens T</creator><creator>Damm, George</creator><creator>Glueck, Julie</creator><creator>Noon, George P</creator><creator>Nosé, Yukihiko</creator><general>Amercian Society of Artificial Internal Organs</general><general>Lippincott</general><scope>IQODW</scope><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>7QO</scope><scope>7TC</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope><scope>7SP</scope><scope>L7M</scope><scope>7X8</scope></search><sort><creationdate>199407</creationdate><title>The Baylor Total Artificial Heart: Flow Visualization Studies</title><author>Orime, Yukihiko ; Takatani, Setsuo ; Tasai, Kimitaka ; Ohara, Yasuhisa ; Naito, Kozo ; Mizuguchi, Kazumi ; Meier, Dirk ; Wernicke, Jens T ; Damm, George ; Glueck, Julie ; Noon, George P ; Nosé, Yukihiko</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3080-efac4e848af8890ee23486eef977188548794db339cf5d6e2e6967f3a0aae0013</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1994</creationdate><topic>Biological and medical sciences</topic><topic>Biomedical Engineering</topic><topic>Blood Flow Velocity</topic><topic>Evaluation Studies as Topic</topic><topic>Heart, Artificial - adverse effects</topic><topic>Hemodynamics</topic><topic>Humans</topic><topic>In Vitro Techniques</topic><topic>Medical sciences</topic><topic>Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)</topic><topic>Regional Blood Flow</topic><topic>Technology. Biomaterials. Equipments. Material. Instrumentation</topic><topic>Thrombosis - etiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Orime, Yukihiko</creatorcontrib><creatorcontrib>Takatani, Setsuo</creatorcontrib><creatorcontrib>Tasai, Kimitaka</creatorcontrib><creatorcontrib>Ohara, Yasuhisa</creatorcontrib><creatorcontrib>Naito, Kozo</creatorcontrib><creatorcontrib>Mizuguchi, Kazumi</creatorcontrib><creatorcontrib>Meier, Dirk</creatorcontrib><creatorcontrib>Wernicke, Jens T</creatorcontrib><creatorcontrib>Damm, George</creatorcontrib><creatorcontrib>Glueck, Julie</creatorcontrib><creatorcontrib>Noon, George P</creatorcontrib><creatorcontrib>Nosé, Yukihiko</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Biotechnology Research Abstracts</collection><collection>Mechanical Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>ASAIO journal (1992)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Orime, Yukihiko</au><au>Takatani, Setsuo</au><au>Tasai, Kimitaka</au><au>Ohara, Yasuhisa</au><au>Naito, Kozo</au><au>Mizuguchi, Kazumi</au><au>Meier, Dirk</au><au>Wernicke, Jens T</au><au>Damm, George</au><au>Glueck, Julie</au><au>Noon, George P</au><au>Nosé, Yukihiko</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Baylor Total Artificial Heart: Flow Visualization Studies</atitle><jtitle>ASAIO journal (1992)</jtitle><addtitle>ASAIO J</addtitle><date>1994-07</date><risdate>1994</risdate><volume>40</volume><issue>3</issue><spage>M499</spage><epage>M505</epage><pages>M499-M505</pages><issn>1058-2916</issn><eissn>1538-943X</eissn><coden>AJOUET</coden><abstract>To analyze the flow patterns of the left blood chamber of the Baylor total artificial heart (TAH) and to evaluate influences of the inflow valve angle to the flow patterns, flow visualization studies were performed. The inflow valve angle of the left housing was changed by 20 degrees orthogonal to the inflow tube, and comparison studies of the modified and unmodified models were made. For evaluating sectional flow patterns, a laser light was used, the clear transparent housing was scanned segmentally, and flow patterns were recorded on high contrast film for measuring flow velocities. A signal was used that synchronized the timing of the camera shutter to the pusher-plate movement signal. With the modified 20 degree inflow valve direction, there were better closing characteristics of the inflow valve leaflets. At the same time, we could successfully reduce the vortex formation at the inflow port, which may cause thrombus formation. We also have improved the washout during the diastolic phase in not only the bottom area, but in the entire pumping chamber. This flow visualization setup is simple and inexpensive. It is useful not only for validation of global flow patterns, but also for validation of local flow velocities of various blood pumps.</abstract><cop>Philadelphia, PA</cop><cop>Hagerstown, MD</cop><pub>Amercian Society of Artificial Internal Organs</pub><pmid>8555566</pmid><doi>10.1097/00002480-199407000-00050</doi></addata></record> |
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| ispartof | ASAIO journal (1992), 1994-07, Vol.40 (3), p.M499-M505 |
| issn | 1058-2916 1538-943X |
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| source | MEDLINE; Journals@Ovid LWW Legacy Archive; Journals@Ovid Complete; EZB-FREE-00999 freely available EZB journals |
| subjects | Biological and medical sciences Biomedical Engineering Blood Flow Velocity Evaluation Studies as Topic Heart, Artificial - adverse effects Hemodynamics Humans In Vitro Techniques Medical sciences Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects) Regional Blood Flow Technology. Biomaterials. Equipments. Material. Instrumentation Thrombosis - etiology |
| title | The Baylor Total Artificial Heart: Flow Visualization Studies |
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