Variable stiffness coil for vasoocclusive devices
US6383204B1 · kind B1 · utility
104Cited by
126References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1998 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Dec 15, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/00867
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The variable stiffness vasoocclusive coil is given variable stiffness along the length of the coil by selectively heat treating certain segments of a primary or secondary coil. The primary coil can be selectively heat treated to form soft or deformable segments along the length of the coil, and can then be shaped into a secondary shape that is set by a heat treatment process. Distal regions of the coil can also be heat treated to make the distal ends of the coil softer, more deformable, or less traumatic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.