Filling material for soft tissue implant prostheses and implants made therewith
US5941909A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Aug 7, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2430/34
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A new soft tissue implant filling material is disclosed. The surgically implantable soft tissue implant filling material has good aesthetic properties, as measured by viscosity and elasticity, and good elimination properties. One embodiment of such a new filling material is a gel which comprises three components. The first component is a water soluble polymer or hydrogel that has a high molecular weight. Alternatively, the first component is both crosslinked and has a high molecular weight. The second component of the filling material is a water-soluble polymer that is eliminated rapidly through the kidneys upon subcutaneous release. The third component of this filling material is saline, which is used to dissolve the polymer and to adjust the osmolality of the polymer. In addition, a buffer may be added to the filling material to adjust the pH of the gel. One gel formulation of the present invention, in its preferred embodiment, consists of polyacrylamide and derivatives thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.