Key result
A 45-degree mitral valve orientation in the 50 cc Penn State left ventricular assist device produced more intense and longer duration wall washing motion, which may help prevent thrombus deposition.
Why the study?
Does mitral valve orientation affect flow dynamics in the 50 cc Penn State left ventricular assist device?
Does mitral valve orientation affect flow dynamics in the 50 cc Penn State left ventricular assist device?
A 45-degree mitral valve orientation in the 50 cc Penn State LVAD optimizes flow dynamics and is recommended to help prevent thrombus deposition.
We investigated the flow fields associated with the Bjork-Shiley Monostrut mechanical heart valve in the mitral position of the 50 cc Penn State left ventricular assist device. The valve orientation was adjusted whereby flow field data was collected using planar particle image velocimetry. The mitral valve was rotated from 0 to 45 degrees, in 15-degree increments. For each valve orientation, measurements were made in three planes (3, 5, and 8 mm from the front wall) parallel to the device pusher plate. Penetration of the inlet jet was affected by the valve orientation with more intense and longer duration wall washing motion occurring at 45 degrees. As a result, the 45-degree mitral valve orientation is recommended to help prevent areas of thrombus deposition. Valve orientation is an important aspect of assist device design.
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Kreider et al. (2006) studied Left ventricular assist device flow dynamics. Mitral valve orientation (0 to 45 degrees) vs. Different valve orientations was evaluated on Flow fields and penetration of the inlet jet. A 45-degree mitral valve orientation in the 50 cc Penn State left ventricular assist device produced more intense and longer duration wall washing motion, which may help prevent thrombus deposition.
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