Stent having spiral channel for drug delivery
US8016880B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2007 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Jul 5, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2250/0068
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drug delivery stent is formed by a metallic or polymeric tubular strut which is shaped into a generally cylindrical configuration, the tubular strut having a central lumen for containing a therapeutic substance or drug therein. The tubular strut has a continuous channel extending from the inside surface of the strut to the outside surface of the strut positioned spirally about or in a corkscrew fashion around a circumference of the tubular strut for delivering the therapeutic substance or drug to a stenotic lesion. The spiral or corkscrew channel width may be varied along the length of the strut to control elution rate and/or flexibility of the stent. The pitch of the spiral or corkscrew channel may also be varied along the length of the strut to control flexibility of the stent. The stent may be carried on a balloon of a balloon catheter to a site of a stenotic lesion where the stent is implanted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.