Capacitance fluid volume measurement
US7107837B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 22, 2002 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Jan 22, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3379
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A fluid volumetric pumping system has a fluid pump and capacitor plates disposed around a pump chamber of the fluid pump. The capacitance between the capacitor plates changes as the volume of fluid in the pump chamber changes. An electrical circuit measures a change in the capacitance between the plates and outputs a signal indicative of the volume of fluid in the pump chamber. The pump having the capacitance sensor of the present invention fluidly connects to a patient. In an embodiment, a peritoneal dialysis system provides dialysate to the patient via the pump, and the capacitance sensor measures the volume of dialysate supplied to and drained from a peritoneal cavity of the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.