Abstract: A method of pneumatically operating a dialysis system includes (i) pumping air in a first valve state from a pneumatic pump to operate a component of the dialysis system, and (ii) recirculating air in a second valve state by pumping air from an outlet of the pneumatic pump to an inlet of the pneumatic pump to minimize at least one of a noise pitch or noise amplitude when switching from the second valve state to the first valve state.

Abstract: A dialysis fluid pressure manifold system includes a plurality of pump and valve chambers controlling a flow of dialysis fluid; a header including a plurality of pneumatic passageways, each passageway in pneumatic communication with one of the pump or valve chambers; a plurality of electrically actuated pneumatic valves; and a plate defining a plurality of pneumatic apertures, each pneumatic aperture in pneumatic communication with one of the plurality of electrically actuated pneumatic valves, the plate providing the apertures each with an o-ring seal for airtight connection with the pneumatic passageways of the header.

Abstract: Temperature compensation is applied to correct for temperature mismatch between a reference chamber and a disposable chamber in a pneumatic pumping system for dialysis fluid for peritoneal dialysis. The mismatch creates an error in the calculation of pumping volume of dialysate fluid. Applying a correction for the temperature mismatch helps to more precisely control the volume of dialysate that is metered to the patient. Also disclosed are ways to keep temperatures constant and to use temperature sensors to accurately measure the temperatures of the chambers. In other aspects, the temperature of the dialysate fluid itself may be measured and used to apply a correction to the volume of fluid that is pumped to the patient.

Abstract: A dialysis fluid heating system includes a plurality of conductive tubes; first and second end caps located at first and second ends of the tubes, respectively, the first end cap including a dialysis fluid inlet and a dialysis fluid outlet, the end caps and the tubes configured such that dialysis fluid can flow from the fluid inlet of the first end cap, through at least one first tube to the second end cap, and through at least one second tube back to the first end cap; a conductive wire wound around an outside of the conductive tubes; and electronics configured to supply power to the conductive wire, the wire forming a primary coil of a transformer, the tubes forming a secondary coil of the transformer.

Abstract: A hinge is provided for mechanically and electrically coupling a machine and a display wirelessly. The hinge includes a machine portion having a first transceiver for wirelessly sending a signal concerning an operation or status of the machine and a display portion having a second transceiver for wirelessly receiving the operating signal. The hinge machine portion and the hinge display portion are mechanically connected so as to: (i) swivel with respect to each other; or (ii) tilt with respect to each other.

Abstract: An operating machine, such as a medical machine or a dialysis machine, includes a housing for operating components of the machine and a moveable user interface or display for viewing and entering information concerning operation of the machine. Signals concerning operating information are wirelessly transmitted between the machine and the display using one of several techniques. Power is also transmitted wirelessly from the operating machine to the screen, or from a separate power source to the display. The wireless signals may be transmitted via induction, radio, infrared or optical means.

Abstract: A method of pneumatically operating a dialysis system includes (i) pumping air in a first valve state from a pneumatic pump to operate a component of the dialysis system, and (ii) recirculating air in a second valve state by pumping air from an outlet of the pneumatic pump to an inlet of the pneumatic pump to minimize at least one of a noise pitch or noise amplitude when switching from the second valve state to the first valve state.

Abstract: A dialysis fluid pressure manifold system includes a plurality of pump and valve chambers controlling a flow of dialysis fluid; a header including a plurality of pneumatic passageways, each passageway in pneumatic communication with one of the pump or valve chambers; a plurality of electrically actuated pneumatic valves; and a plate defining a plurality of pneumatic apertures, each pneumatic aperture in pneumatic communication with one of the plurality of electrically actuated pneumatic valves, the plate providing the apertures each with an o-ring seal for airtight connection with the pneumatic passageways of the header.

Abstract: A dialysis system includes at least one pneumatic valve, a pneumatic pump in fluid communication with the pneumatic valve, a pneumatic line communicating with an inlet and an outlet of the pneumatic pump, a flow restrictor placed in the pneumatic line, and a logic implementer. The logic implementer is programmed to operate the pneumatic valve to either (i) communicate the pneumatic outlet with the pneumatic inlet of the pneumatic pump through the flow restrictor and the pneumatic line, or (ii) communicate the outlet of the pneumatic pump with a component of the dialysis system.

Abstract: A dialysis fluid heating system includes a dialysis fluid heater; a dialysis fluid carrying element in operable communication with the dialysis fluid heater to heat a dialysis fluid; and a logic implementer configured to control the heater using (i) a heater input determined from a dialysis fluid temperature delta and a dialysis fluid flowrate, and (ii) a potential adjustment of the temperature delta using a measured dialysis fluid outlet temperature.

Abstract: Temperature compensation is applied to correct for temperature mismatch between a reference chamber and a disposable chamber in a pneumatic pumping system for dialysis fluid for peritoneal dialysis. The mismatch creates an error in the calculation of pumping volume of dialysate fluid. Applying a correction for the temperature mismatch helps to more precisely control the volume of dialysate that is metered to the patient. Also disclosed are ways to keep temperatures constant and to use temperature sensors to accurately measure the temperatures of the chambers. In other aspects, the temperature of the dialysate fluid itself may be measured and used to apply a correction to the volume of fluid that is pumped to the patient.

Abstract: A dialysis system includes at least one pneumatic valve, a pneumatic pump in fluid communication with the pneumatic valve, a pneumatic line communicating with an inlet and an outlet of the pneumatic pump, a flow restrictor placed in the pneumatic line, and a logic implementer. The logic implementer is programmed to operate the pneumatic valve to either (i) communicate the pneumatic outlet with the pneumatic inlet of the pneumatic pump through the flow restrictor and the pneumatic line, or (ii) communicate the outlet of the pneumatic pump with a component of the dialysis system.

Abstract: Temperature compensation is applied to correct for temperature mismatch between a reference chamber and a disposable chamber in a pneumatic pumping system for dialysis fluid for peritoneal dialysis. The mismatch creates an error in the calculation of pumping volume of dialysate fluid. Applying a correction for the temperature mismatch helps to more precisely control the volume of dialysate that is metered to the patient. Also disclosed are ways to keep temperatures constant and to use temperature sensors to accurately measure the temperatures of the chambers. In other aspects, the temperature of the dialysate fluid itself may be measured and used to apply a correction to the volume of fluid that is pumped to the patient.

Abstract: A dialysis machine valve manifold assembly includes a plurality of pneumatic valves; a plate including a first side and a second side, the plurality of pneumatic valves mounted to the first side of the plate, the second side of the plate defining a plurality of pneumatic flow paths; and a port header mounted removably to the plate, the port header including a plurality of ports configured to connect sealingly to pneumatic tubing, the ports in fluid communication with the pneumatic valves via the pneumatic flow paths defined in the plate.

Abstract: An operating machine, such as a medical machine or a dialysis machine, includes a housing for operating components of the machine and a moveable user interface or display for viewing and entering information concerning operation of the machine. Signals concerning operating information are wirelessly transmitted between the machine and the display using one of several techniques. Power is also transmitted wirelessly from the operating machine to the screen, or from a separate power source to the display. The wireless signals may be transmitted via induction, radio, infrared or optical means.

Abstract: A dialysis machine includes a control unit having a user interface; a heater(s) located separate from the control unit; a supervisory processor located with the control unit; a delegate control processor located with the heater(s), the delegate control processor in communication with the supervisory processor and configured to receive load cell, heater(s) plate and supply bag temperature sensor inputs; and a sub-delegate heater(s) processor in communication with the control processor and configured to control power to the heater(s). The machine can also include primary and secondary monitoring processors that perform a safety check to the control processing and monitor the load cell.

Abstract: A dialysis machine valve manifold assembly includes a plurality of pneumatic valves; a plate including a first side and a second side, the plurality of pneumatic valves mounted to the first side of the plate, the second side of the plate defining a plurality of pneumatic flow paths; and a port header mounted removably to the plate, the port header including a plurality of ports configured to connect sealingly to pneumatic tubing, the ports in fluid communication with the pneumatic valves via the pneumatic flow paths defined in the plate.

Abstract: Temperature compensation is applied to correct for temperature mismatch between a reference chamber and a disposable chamber in a pneumatic pumping system for dialysis fluid for peritoneal dialysis. The mismatch creates an error in the calculation of pumping volume of dialysate fluid. Applying a correction for the temperature mismatch helps to more precisely control the volume of dialysate that is metered to the patient. Also disclosed are ways to keep temperatures constant and to use temperature sensors to accurately measure the temperatures of the chambers. In other aspects, the temperature of the dialysate fluid itself may be measured and used to apply a correction to the volume of fluid that is pumped to the patient.

Abstract: A dialysis fluid heating system includes a dialysis fluid heater; a dialysis fluid carrying element in operable communication with the dialysis fluid heater to heat a dialysis fluid; and a logic implementer configured to control the heater using (i) a heater input determined from a dialysis fluid temperature delta and a dialysis fluid flowrate, and (ii) a potential adjustment of the temperature delta using a measured dialysis fluid outlet temperature.

Abstract: A dialysis fluid heating system includes a plurality of conductive tubes; first and second end caps located at first and second ends of the tubes, respectively, the first end cap including a dialysis fluid inlet and a dialysis fluid outlet, the end caps and the tubes configured such that dialysis fluid can flow from the fluid inlet of the first end cap, through at least one first tube to the second end cap, and through at least one second tube back to the first end cap; a conductive wire wound around an outside of the conductive tubes; and electronics configured to supply power to the conductive wire, the wire forming a primary coil of a transformer, the tubes forming a secondary coil of the transformer.