Hydraulic foam tissue implant
US5824081A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Sep 13, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L27/56
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a tissue implant having visco-elastic characteristics which simulate the natural tissue that is intended to be augmented or replaced. The implant is comprised of a shell or envelope enclosing a compound foam body and a fluid filler material. Both the foam body and the fluid filler are should be biocompatible and preferably are substantially radiolucent using standard mammographic materials and protocols. The compound foam body is of elastomeric cellular foam materials. Intercellular communication of the fluid filler provides a hydraulic mechanism for imparting shape and tissue-like consistency to the implant. The compound foam body has multiple regions, each region having a different cellular density, for simulating the tactile characteristics of the natural tissue that the implant is intended to augment or replace. The implant may also have a cavity in the compound foam body configured for providing a hydraulic reservoir for the fluid filler. The resiliency of the compound foam body permits realistic elastic deformation, in response to external pressure, and "rebound" following such deformation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.