Polymer heart valve with helical coaption surface
US6454798B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Dec 21, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/2412
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polymer heart valve has a leaflet with a base geometry of a cylinder for simplicity and effective opening. A helical swept surface is added to the top of the cylinder to enhance stable coaption. The heart valve includes a plurality of flexible leaflets. Each leaflet includes a top portion and a bottom portion. The bottom portion is an axial section of a cylinder having an axis and a radius. A first section of the top portion is a surface defined by a first arc having a first radius swept along a first helix. The first arc is tangent to the axial section of the cylinder. A second section of the top portion is a surface defined by a second arc having a second radius swept along a second helix. The second arc is tangent to the axial section of the cylinder. The second helix is a left-handed helix having the same radius and axis as the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.