Implanted medication infusion device
US4715852A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1986 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Jul 21, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implantable positive pressure medication infusion device is provided which is programmable over a wide dynamic range and yet the maximum flow of medication into the body, in the event the inlet valve of the device leaks or fails in the valve open position, is limited to a safe value which is much lower than the maximum programmable infusion rate of the device. An auxiliary flow restrictor is also provided which bypasses the programmable pumping unit and assures a minimum flow of medication into the body in the event of failure of the programmable pumping unit or its electronic drive. An arrangement is also provided for detecting catheter clogging or failure of the programmable pumping unit in either a positive or negative pressure device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.