Apparatus for a stent or other medical device having a bistable spring construction
US7235097B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2003 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Jul 29, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2250/0018
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A stent is described comprising a unit cell having a negative spring rate and a bistable function. The unit cell comprises first and second segments, the first segment being more rigid than the second segment. The second segment is coupled to the first segment, and the first segment comprises a substantially fixed sinusoidal shape. In the contracted state, the second segment is held stable in a sinusoidal shape, but when a force is applied the second segment bends out to a stable, convex-shaped deployed state. The second segments withstand the application of radial forces in the convex-shaped deployed state, and diametral recoil of the stent is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.