Biocompatible medical devices with polyurethane surface
US6323256A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1999 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Jun 11, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides a method for improving the biocompatibility of devices, especially medical devices which are invasively present within a patient's body and the improved medical device. The present invention particularly reduces the thrombogenicity of polyurethane materials in contact with the blood of a living patient. The method comprises providing a biocompatible medical device having polymeric polyurethane components thereon, exposing the polyurethane components of the medical device to polar solvents for said polymeric components while the polar solvents are in the vapor phase, and allowing said vapor phase exposure to continue for a sufficient amount of time as to reduce at least some irregular or sharp features on the surface of the polymeric component. The invention describes a method of improving a medical device having at least one polymeric component, the process comprising the steps of providing a vapor phase comprising a solvent for said polymer component, and exposing said polymeric component to said vapor phase. The process comprises taking a polyurethane component having a surface with a topography (e.g., roughness, grooves, wave patterns, sharp edge f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.