Medical guide wire
US8968216B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2014 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | May 29, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/09175
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An outer coil and an inner coil are joined in parallel with a distal end portion of a core of a guide wire. A winding direction of a strand of the outer coil is the same as that of a strand of the inner coil. Diameters of the outer and inner coils increase or decrease when rotation of the core is transmitted and thereby rotation transmission capability is improved. An outer space wound portion and an inner space wound portion are formed in corresponding positions in the outer coil and the inner coil, respectively, in a core direction. Even if the guide wire has a double-coil structure, the outer and inner space wound portions improve flexibility of the guide wire. A coil pitch of the outer space wound portion differs from a coil pitch of the inner space wound portion. Thereby, engagement of the strands is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.