Method for regulating fluid pump pressure
AssigneeDEKA Products Limited Partnership
InventorsLarry Gray, Robert Bryant
Life of this patent
Estimating the term…
Abstract
A method is provided for regulating fluid pump pressures by detecting an elevation differential between a fluid flow control device and the distal end of a fluid line in communication with the fluid flow control device. A fluid flow control device, for instance a peritoneal dialysis device, is at a first height, a distal end of a fluid line is at a second height, and a valved outlet, when open, affords communication between the fluid flow control device and the distal end of the fluid line. The elevation differential is correlatable with a pressure measurable during a calibration procedure provided as a part of the methodology.
Claims26
A method for regulating pressure at a distal end of a fluid line, the method comprising:
- providing a fluid flow control system, the fluid flow control system having at least one liquid volume in valved communication with. the distal end, a control volume in pressure communication with the liquid volume, means for measuring pressure in the control volume, and means for adjusting the pressure in the control volume;
- calibrating the means for measuring the pressure;
- establishing communication between the liquid volume and the distal end;
- measuring a pressure of the control volume;
- and
- adjusting the pressure in the control volume in accordance with the measured pressure.
A method for regulating pressure in a fluid line, the method comprising:
- providing a fluid flow control system, the fluid flow control system having at least one liquid volume in valved communication with a distal end of a fluid line;
- isolating the liquid volume from the distal end;
- measuring a first calibration pressure of a control volume in pressure communication with the liquid volume;
- pressurizing the liquid volume;
- measuring a second calibration pressure of the control volume;
- establishing communication between the liquid volume and the distal end;
- measuring a pressure of the control volume;
- and
- adjusting the pressure in accordance with the measured pressure and the first and second calibration pressures.
A method for regulating pressure in a fluid line, the method comprising:
- providing a fluid flow control system, the fluid flow control system having at least one liquid volume in valved communication with a distal end of a fluid line;
- isolating the liquid volume from the distal end;
- measuring the pressure of a control volume in pressure communication with the liquid volume;
- positively pressurizing the liquid volume;
- measuring the pressure of the control volume while the liquid volume is positively pressurized;
- negatively pressurizing the liquid volume;
- measuring a pressure of the control volume while the liquid volume is negatively pressurized;
- establishing communication between the liquid volume and the distal end;
- measuring the pressure of the control volume;
- and
- adjusting the pressure in accordance with the measured pressure.
A method for regulating pressure in a fluid line, the method comprising:
- providing a fluid flow control system, the fluid flow control system having means for measuring pressure, a first liquid volume and a second liquid volume, the first liquid volume in valved communication with the second liquid volume;
- establishing valved communication between a distal end of the fluid line and the first liquid volume and the second liquid volume;
- calibrating the means for measuring pressure;
- establishing communication between the first liquid volume and the distal end;
- measuring a pressure of a fluid in pressure equilibrium with liquid in the first liquid volume;
- adjusting the pressure in accordance with the measured pressure.
A method for regulating pressure at a distal end of a fluid line, the method comprising:
- providing a fluid flow control system, the fluid flow control system having at least one liquid volume in valved communication with the distal end, a control volume in pressure communication with the liquid volume, a pressure transducer in communication with the control volume, and a pressure adjuster in communication with the control volume;
- calibrating the pressure transducer;
- establishing communication between the liquid volume and the distal end;
- measuring a pressure of the control volume;
- and
- adjusting the pressure in the control volume in accordance with the measured pressure.
A method for regulating pressure in a fluid line, the method comprising:
- providing a fluid flow control system, the fluid flow control system having a pressure transducer, a first liquid volume and a second liquid volume, the first liquid volume in valved communication with the second liquid volume;
- establishing valved communication between a distal end of the fluid line and the first liquid volume and the second liquid volume;
- calibrating the pressure transducer;
- establishing communication between the first liquid volume and the distal end;
- measuring a pressure of a fluid in pressure equilibrium with liquid in the first liquid volume;
- adjusting the pressure in accordance with the measured pressure.
Dependencies are inferred from the claim text.