Endocardial pacemaker electrode
US4280514A · kind A · utility
Inventor
Key dates
| Filing date | Jul 23, 1979 |
| Grant date | Jul 28, 1981 |
| Priority date | — |
| Expiry date | Jul 23, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/0565
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An endocardial pacemaker electrode is constructed of electroconductive metal inert to blood and consists of a dense rigid metal substrate and a rigid porous metal coating adhered to at least a major portion of the substrate. The electrode has a regular geometrical shape with a maximum transverse dimension of about 0.5 to 3 mm and a minimum longitudinal dimension of at least about 0.25 mm. The porous coating includes a plurality of metal particles bonded together at their points of contact with each other and with the substrate to form a network of interconnected pores substantially uniformly distributed throughout the coating. The porous coating has a porosity of about 10 to 50% by volume and a thickness of less than about 500 microns. The metal particles have a particle size selected from -100 +325 mesh, -325 +500 mesh and -500 mesh. The porous coating permits tissue formation from cellular elements in the blood stream to stabilize its position in the heart and the formation of surface tissue in those areas exposed to flowing blood prevents the formation of blood clots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.