Implantable demand medication delivery assembly
US4634427A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1984 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Sep 4, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/1428
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implantable demand medication delivery assembly for delivering measured aliquots of liquid medication. The assembly includes a reservoir which stores the liquid medication to be delivered. The assembly also includes a pump which is in fluid communication with the reservoir. The pump includes a housing having an inlet port in fluid communication with the reservoir and an outlet port. Connected to the outlet port is a delivery catheter for delivering the liquid medication to a site within the patient wherein the assembly is implanted. The pump also includes a fluid passage which extends between the inlet and outlet port. A chamber is provided along the fluid passage for containing a preselected volume of liquid medication to be delivered. A resilient deformable wall on the pump extends over the chamber. A one-way valve is provided in the fluid passage between the inlet port and chamber for permitting fluid flow toward the chamber. A pressure regulated valve is provided in the fluid passage between the chamber and outlet port for selectively permitting fluid flow through the delivery catheter upon actuation of the pump. A puncturable and resealable injection site can also be part o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.