Effect of Bileaflet Valve Orientation on the 3D Flow Dynamics in the Sinus of Valsalva
Three-dimensional (3D) evolutional behavior of flow dynamics in the aortic sinus of Valsalva was studied in vitro for finding the effects of bileaflet valve orientations in an effort to investigate possible linkages between the sinus flow and coronary circulation. A realistic model of the aortic sin...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2011-04-01
|
| Series: | Journal of Biomechanical Science and Engineering |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jbse/6/2/6_2_64/_pdf/-char/en |
| _version_ | 1828763150521991168 |
|---|---|
| author | Takanobu YAGI William YANG Mitsuo UMEZU |
| author_facet | Takanobu YAGI William YANG Mitsuo UMEZU |
| author_sort | Takanobu YAGI |
| collection | DOAJ |
| description | Three-dimensional (3D) evolutional behavior of flow dynamics in the aortic sinus of Valsalva was studied in vitro for finding the effects of bileaflet valve orientations in an effort to investigate possible linkages between the sinus flow and coronary circulation. A realistic model of the aortic sinus was machined inside an acrylic block. A St. Jude Medical bileaflet aortic valve was utilized. Two orientations were compared; (1) a pair of hinges aligned in the direction of the non-coronary sinus of the model (N0) and (2) of the left and right sinuses (N90). A 3D scanning three-component velocity measurement, named Fluorescent Scanning Stereoscopic Particle Image Velocimetry (FS-SPIV), was developed. Measured data were validated with an aid of two-dimensional particle image velocimetry. Good agreement confirmed the capability of quantifying the 3D mean and turbulent behavior of sinus vortices. The valve orientation was found to be unable to affect the sinus vortices during peak-systole, but had a substantial impact on regurgitation during end-systole. The superior case (N0) gave a symmetric regurgitation. The regurgitant jet was directed to the non-coronary sinus. The left and right sinuses were dominated by a well-organized recirculation from a persistent forward flow. The inferior case (N90) produced an asymmetric regurgitation with a biased jet into the left or right sinuses, leading to produce unexpected turbulence near the entrance of coronary artery. Those results suggest possible linkages between the sinus flow and coronary circulation, thereby advocating the existence of an optimal orientation of bileaflet valves. |
| first_indexed | 2024-12-11T01:56:12Z |
| format | Article |
| id | doaj.art-ecb25768c4384c76aa71f8abab052c16 |
| institution | Directory Open Access Journal |
| issn | 1880-9863 |
| language | English |
| last_indexed | 2024-12-11T01:56:12Z |
| publishDate | 2011-04-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Biomechanical Science and Engineering |
| spelling | doaj.art-ecb25768c4384c76aa71f8abab052c162022-12-22T01:24:37ZengThe Japan Society of Mechanical EngineersJournal of Biomechanical Science and Engineering1880-98632011-04-0162647810.1299/jbse.6.64jbseEffect of Bileaflet Valve Orientation on the 3D Flow Dynamics in the Sinus of ValsalvaTakanobu YAGI0William YANG1Mitsuo UMEZU2Center for Advanced Biomedical Sciences, TWIns, Waseda UniversityCSIRO Process Science and EngineeringCenter for Advanced Biomedical Sciences, TWIns, Waseda UniversityThree-dimensional (3D) evolutional behavior of flow dynamics in the aortic sinus of Valsalva was studied in vitro for finding the effects of bileaflet valve orientations in an effort to investigate possible linkages between the sinus flow and coronary circulation. A realistic model of the aortic sinus was machined inside an acrylic block. A St. Jude Medical bileaflet aortic valve was utilized. Two orientations were compared; (1) a pair of hinges aligned in the direction of the non-coronary sinus of the model (N0) and (2) of the left and right sinuses (N90). A 3D scanning three-component velocity measurement, named Fluorescent Scanning Stereoscopic Particle Image Velocimetry (FS-SPIV), was developed. Measured data were validated with an aid of two-dimensional particle image velocimetry. Good agreement confirmed the capability of quantifying the 3D mean and turbulent behavior of sinus vortices. The valve orientation was found to be unable to affect the sinus vortices during peak-systole, but had a substantial impact on regurgitation during end-systole. The superior case (N0) gave a symmetric regurgitation. The regurgitant jet was directed to the non-coronary sinus. The left and right sinuses were dominated by a well-organized recirculation from a persistent forward flow. The inferior case (N90) produced an asymmetric regurgitation with a biased jet into the left or right sinuses, leading to produce unexpected turbulence near the entrance of coronary artery. Those results suggest possible linkages between the sinus flow and coronary circulation, thereby advocating the existence of an optimal orientation of bileaflet valves.https://www.jstage.jst.go.jp/article/jbse/6/2/6_2_64/_pdf/-char/enstereoscopic particle image velocimetryturbulencevalidationaortavalsalvabileafletorientationcoronary circulation |
| spellingShingle | Takanobu YAGI William YANG Mitsuo UMEZU Effect of Bileaflet Valve Orientation on the 3D Flow Dynamics in the Sinus of Valsalva Journal of Biomechanical Science and Engineering stereoscopic particle image velocimetry turbulence validation aorta valsalva bileaflet orientation coronary circulation |
| title | Effect of Bileaflet Valve Orientation on the 3D Flow Dynamics in the Sinus of Valsalva |
| title_full | Effect of Bileaflet Valve Orientation on the 3D Flow Dynamics in the Sinus of Valsalva |
| title_fullStr | Effect of Bileaflet Valve Orientation on the 3D Flow Dynamics in the Sinus of Valsalva |
| title_full_unstemmed | Effect of Bileaflet Valve Orientation on the 3D Flow Dynamics in the Sinus of Valsalva |
| title_short | Effect of Bileaflet Valve Orientation on the 3D Flow Dynamics in the Sinus of Valsalva |
| title_sort | effect of bileaflet valve orientation on the 3d flow dynamics in the sinus of valsalva |
| topic | stereoscopic particle image velocimetry turbulence validation aorta valsalva bileaflet orientation coronary circulation |
| url | https://www.jstage.jst.go.jp/article/jbse/6/2/6_2_64/_pdf/-char/en |
| work_keys_str_mv | AT takanobuyagi effectofbileafletvalveorientationonthe3dflowdynamicsinthesinusofvalsalva AT williamyang effectofbileafletvalveorientationonthe3dflowdynamicsinthesinusofvalsalva AT mitsuoumezu effectofbileafletvalveorientationonthe3dflowdynamicsinthesinusofvalsalva |