Tricuspid prosthetic tissue heart valve
US4470157A · kind A · utility
Inventor
Key dates
| Filing date | Apr 19, 1983 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Apr 19, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2220/0075
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for providing a tricuspid heart valve that can be assembled with autogenous or foreign tissue using a prefabricated kit comprised of two stents that mate together and a sewing ring, one stent inside or below the other, with the tissue clamped between the stents. The inner or lower stent has a scalloped wall to provide three equally spaced peaks extending from an annular base. The stents may have interlocking means at or near their base to not only lock them together, but also to clamp the tissue in place more securely. In the case of having the one stent inside the other, both stents may have a scalloped wall. The tissue is first placed over the inner stent, then after the outer stent is placed over the tissue, excess tissue is trimmed. The mated stents secure the tissue securely in place. The outer stent may have a ledge along its upper edge overhanging the inner stent to clamp the tissue. In the case of having one stent below the other, the upper stent may be a short cylinder scalloped at both ends to fit as a cap over the lower stent. Alternatively, the upper stent may be formed from three sections of bent rods welded at the peaks. In either case, the uppe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.