Positive pressure programmable infusion pump
US4714462A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1986 |
| Grant date | Dec 22, 1987 |
| Priority date | — |
| Expiry date | Feb 3, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3523
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A positive pressure positive displacement implantable infusion pump. A positive pressure fluid reservoir maintains infusate for delivery by a positive pressure displacement pump. Infusate is drawn by the pump into a drug pressurant chamber. A check valve prevents backflow into the reservoir. The check valve may independently establish a basal flow rate by not completely sealing in the forward flow direction. The pump pulses to expel and fill the chamber thereby establishing the flow rate, basal or bolus through a restrictor interposed between the chamber and the infusion site. The pump may run in open loop, pre-programmed or externally programmed modes of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.