Implantable drug infusion reservoir having fluid impelling resilient foam member
US5176641A · kind A · utility
105Cited by
7References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1991 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Jul 8, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/145
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implantable infusion reservoir having a resilient foam member in a rigid housing to urge fluid to an implantation site. The foam member compresses upon charging and then expands to maintain a predetermined pressure characteristic within the fluid. The foam replaces the previously used two-phase propellent and eliminates the need for a hermetic metal bellows. The foam may be either closed celled or open celled, with or without a barrier skin. The device can be conformal to any desired shape and employ various metering techniques to deliver accurate quantities of fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.