Flow condition sensor assembly for patient infusion device
US6830558B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2002 |
| Grant date | Dec 14, 2004 |
| Priority date | — |
| Expiry date | May 28, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3569
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for delivering fluid to a patient including an exit port assembly adapted to connect to a transcutaneous patient access tool, a flow path extending from the exit port assembly, and a flow condition sensor assembly. The sensor assembly includes a resilient diaphragm having a first surface positioned against the flow path, a chamber wall defining a sensor chamber adjacent a second surface of the diaphragm, and at least one sensor arranged to provide a threshold signal when the second surface of the diaphragm expands into the chamber in response to at least one predetermined fluid flow condition occurring in the flow path. The sensor includes a first electrode secured on the diaphragm, a second electrode positioned in a fixed location with respect to the first electrode, and an impedance meter connected between the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.