Helix rotation by traction
US7092764B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2002 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Feb 25, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2001/0578
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention includes a “Z shaped” configuration for a pair of internal windings of a fiber core of a medical electrical lead which can be configured as or windings to provide counter-rotation an implanted cardiac lead. When fully assembled and implanted within a patient, a screw-type active fixation electrode, such as a helical electrode, electrically couples to a coil conductor and mechanically couples to a loop formed at an end of the Z-shaped braided fiber. To remove the lead, an axial traction force is applied and as the Z-shaped braids begin to unwind rotational forces operate to unscrew the helical electrode. A lead constructed according to the present invention rotates counterclockwise and thus essentially unscrews the active fixation electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.