Silver implantable medical device
US5873904A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 24, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Feb 24, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/1002
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A silver implantable medical device 29 includes a structure 12 adapted for introduction into the vascular system, esophagus, trachea, colon, biliary tract, or urinary tract; at least one layer 18 of a bioactive material posited on one surface of structure 12; and at least one porous layer 20 posited over the bioactive material layer 18 posited on one surface of structure (12) and the bioactive-material-free surface. Also included is a layer or impregnation of silver 45. Preferably, the structure 12 is a coronary stent. The porous layer 20 is comprised of a polymer applied preferably by vapor or plasma deposition and provides a controlled release of the bioactive material. It is particularly preferred that the polymer is a polyamide, parylene or a parylene derivative, which is deposited without solvents, heat or catalysts, merely by condensation of a monomer vapor. Silver is included as a base material, coating or included in a carrier, drug, medicant material utilized with the implantable stent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.