Implantable metered dose drug delivery system
US4544371A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1982 |
| Grant date | Oct 1, 1985 |
| Priority date | — |
| Expiry date | Oct 5, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/1428
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implantable metered dose drug delivery system is disclosed which comprises implantable components including an injection site, reservoir, metering valve and delivery catheter, all of which are interconnected through suitable tubing. The metering valve has a domed body constructed of a resilient elastomeric material with a fluid-flow passageway extending therethrough and opening into a chamber within the domed body. A valve is positioned within an outlet leading from the chamber, which valve is opened by exerting an external pressure on the domed body to first collapse and occlude the fluid-flow passageway and then open the valve to permit medication within the chamber to flow through the outlet. Upon release of the external pressure, the fluid-flow passageway opens and reduced pressure in the chamber draws additional fluid through the passageway to fill the chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.