| 摘要 |
<p>A heart valve occluder includes a ring of hard, wear-resistant material such as isotropic, pyrolytic carbon embedded in a plastic matrix with the outer circumference of the ring protruding from the plastic about the entire circumference of the occluder. By this arrangement, the wear rate on the edge of the occluder is improved, while the noise of the occluder striking the struts of its cage is reduced.</p> |
