Guide wire for a catheter
US5230348A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 11, 1991 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | Oct 11, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/09141
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A guide wire for a catheter is disclosed that includes a core wire and a sheath for covering at least the distal end of the core wire. The core wire is formed from a nickel-titanium alloy having a nickel-titanium ratio in the range of 3:2 to 1:1. The core wire is worked in a manner such that in a tensile test wherein the core wire is elongated by at least 5%, the core wire has a recovery percentage of at least 90%. Additionally, elongations in the range of zero and 5% do not cause any stress-induced martensitic transformations and/or austinite reverse transformations. Thus, the load-elongation characteristics of the nickel-titanium alloy are such that the load increasing rate is either proportional or gradually decreasing throughout the elongation range of 0 to 5%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.