Intramuscular electrode for neuromuscular stimulation system
US4989617A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jul 14, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/057
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A helix (10) is defined by two lengths of multistrand wire (14) each surrounded by flexible, biocompatible insulation (18). A silicon elastic sheath (30) surrounds the helix and extends to a terminal end of the electrode. At the terminal end, a portion of the wire is wrapped around a periphery of the sheath to define a tissue contacting surface (34). A shaft (42) of a polypropylene anchor (40) is inserted into a hollow core (20) of the helix and thermally deformed into mechanical engagement with the helix. The anchor has a plurality of polypropylene tines or barbs (44) which firmly engage the tissue within which it is inserted but which yield for electrode removal without ripping the tissue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.