Stent with reduced shortening
US6520985B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2000 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Dec 23, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00017
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A balloon expandable metal stent is provided that includes a multiplicity of circumferential sets of strut members wherein at least two adjacent circumferential sets of strut members are coupled together by a plurality of undulating longitudinal struts. The stent is annealed to a degree where frictional forces existing in the longitudinal direction between adjacent circumferential sets of strut members and the balloon, during inflation, are greater than a force required to permanently deform the undulating longitudinal struts. Thus, the expansion of the space between adjacent circumferential sets of strut members during inflation of the balloon compensates for shortening of the stent that would otherwise occur during radial expansion of the stent responsive to the inflation of the balloon. The undulating longitudinal struts also have a width dimension throughout their length which is less than a width dimension of the circumferential sets of strut members to further facilitate the deformation of the undulating longitudinal struts when the balloon is inflated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.