Monitoring of the pressure of a product fluid to be administered in dosed amounts during infusion or injection
US6368314B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1999 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Sep 7, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/332
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a process for the monitoring of the pressure of a product fluid to be administered in dosed amounts during an infusion or injection, which is dispensable from a container that is received in or formed by a housing, by advancement of a piston received in the container. The reaction force exerted by the piston onto the housing, which serves as a measure for the fluid pressure, is hereby measured and fed to a control for a drive of the piston. The control compares the measured reaction force with a predetermined reference force and controls the drive of the motor under consideration of the result of the comparison. The reference force is a nominal value for the reaction force and a direct nominal/actual comparison is carried out between the measured reaction force and its nominal value. The invention further relates to an apparatus which is especially suited for carrying out the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.