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US 10,328,200 B2Granted
Multifunction capacitive sensor for medical pump
AssigneeZyno Medical, LLC
InventorsMei Zhang, Chaoyoung Lee
Life of this patent
Estimating the term…
Abstract
A medical pump or the like provides for a multi-function flow monitor that provides for capacitive plates positioned on opposite sides of the IV line to sense changes in the electrical environment within the IV line to deduce IV line pressure, the presence of IV fluid bubbles, the presence of the IV line within the pump, and/or correct pump operation. Each of these conditions may be determined by different analysis of the capacitance across the capacitive plates.
Claims14
A medical liquid delivery system comprising:
- a housing adapted to receive an IV line within a housing portion wherein a received portion of the IV line is elastic to expand and contract in cross section with changes in pressure of liquid within the IV line;
- first and second capacitive sensor electrodes positioned on the housing portion in fixed separation to flank the received IV line;
- and
- control electronics configured to communicate with the first and second capacitive sensor electrodes to measure capacitance across the first and second capacitive sensor electrodes through the IV line and to measure a pressure of medical liquid within the received IV line based on changes in a dielectric material of the medical liquid between the first and second capacitive sensor electrodes with expansion of the IV line and to detect an overpressure in the IV line;
- wherein the capacitive sensor electrodes are attached to the housing to be retained in the housing with removal of the IV line.
2 more elements
A medical liquid delivery system comprising:
- an elastic IV line compliant to expand and contract in cross section with changes in pressure of liquid within the IV line;
- a housing adapted to receive the IV line within a housing portion;
- at least two capacitive sensor electrodes positioned on the housing portion in fixed separation, the IV line positioned between the first and second capacitive sensor electrodes to flank the received IV line, and
- control electronics configured to communicate with the first and second capacitive sensor electrodes to measure capacitance across the first and second capacitive sensor electrodes through the IV line to measure (1) a pressure of medical liquid within the IV line based on changes in a dielectric material of the medical liquid between the first and second capacitive sensor electrodes with expansion of the IV line and to detect an overpressure in the IV line and (2) a presence of a liquid-filled IV line between the first and second capacitive sensor electrodes.
1 more element
Dependencies are inferred from the claim text.