Capacitance fluid volume measurement
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United States of America Patent
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Sep 19, 2006
Issued Date -
N/A
app pub date -
Jan 22, 2002
filing date -
Jan 22, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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