| 摘要 |
<p>A prosthetic venous valve has two cusp-forming portions (10, 11) and a base portion (17). Each cusp-forming portion (10, 11) has an arcuate boundary (16) of elliptical shape that ends from the top (13) of the cusp-forming portion (10, 11) towards the base portion (17). The valve is positioned around a vein and the tabs (20, 20a) are secured together so that the valve forms a tube around the vein. A portion of the vein wall is then intussuscepted over the cusp-forming portion to form a venous valve in which blood does not come in contact with the cusp-forming portions (10, 11).</p> |
