Automated peritoneal dialysis cycler having gravimetric control

The peritoneal dialysis (“PD”) system comprising:

• a cycler including
• a weigh scale,
• a chamber positioned to be weighed by the weigh scale,
• a heater supported by a bottom of the chamber configured to heat an inside of the chamber,
• a plurality of valves supported by the chamber or a housing of the cycler,
• at least one temperature sensor,
• a pump supported by the chamber or a housing of the cycler, and
• a control unit operable with the weigh scale, the heater, the plurality of valves and the pump;
• and
• a disposable set including
• a PD fluid container sized to fit within the chamber so as to be weighed by the weigh scale and heated by the heater, the PD fluid container including a fresh PD fluid compartment and a used PD fluid compartment,
• a supply line in fluid communication with the fresh PD fluid compartment and extending outside of the chamber,
• a drain line in fluid communication with the used PD fluid compartment and extending outside of the chamber, and
• a patient line positioned on an opposing side of the pump from the supply line and the drain line,
• wherein the control unit is configured to operate the plurality of valves and the pump bidirectionally to pump (i) used dialysis fluid from the patient line, through the drain line, to the used PD fluid compartment and (ii) fresh dialysis fluid from the fresh PD fluid compartment, through the supply line, and through the patient line,
• wherein the control unit is further configured to receive output signals from the at least one temperature sensor and weight signals from the weigh scale and stop the pump when the weigh scale records a prescribed patient fill volume worth of the fresh dialysis fluid as having left the PD fluid container.

A peritoneal dialysis (“PD”) system comprising:

• a cycler including
• a weigh scale,
• a chamber positioned to be weighed by the weigh scale,
• a heater supported by a bottom of the chamber configured to heat an inside of the chamber,
• a plurality of valves supported by the chamber or a housing of the cycler,
• at least one temperature sensor,
• a pump supported by the chamber or a housing of the cycler, and
• a control unit operable with the weigh scale, the heater, the plurality of valves and the pump;
• and
• a disposable set including
• a PD fluid container sized to fit within the chamber so as to be weighed by the weigh scale and heated by the heater, the PD fluid container including a fresh PD fluid compartment and a used PD fluid compartment, a first one-way valve in fluid communication with the fresh PD fluid compartment, the first one-way valve oriented to open under negative pressure from outside the fresh PD fluid compartment, a second one-way valve in fluid communication with the used PD fluid compartment, the second one-way valve oriented to open under positive pressure from outside the used PD fluid compartment,
• a supply/drain line in fluid communication with the first and second one-way valves, the supply/drain line extending outside of the chamber, and
• a patient line positioned on an opposing side of the pump from the supply/drain line,
• wherein the control unit is configured to operate the plurality of valves and the pump bidirectionally to pump (i) used dialysis fluid from the patient line, through the supply/drain line and the second one-way valve, to the used PD fluid compartment and (ii) fresh dialysis fluid from the fresh PD fluid compartment, through the first one-way valve and the supply/drain line, through the patient line,
• wherein the control unit is further configured to receive output signals from the at least one temperature sensor and weight signals from the weigh scale and stop the pump when the weigh scale records a prescribed patient fill volume worth of the fresh dialysis fluid as having left the PD fluid container.

A peritoneal dialysis (“PD”) system comprising:

• a cycler including
• a weigh scale,
• a chamber positioned to be weighed by the weigh scale,
• a heater supported by a bottom of the chamber configured to heat an inside of the chamber,
• a plurality of valves supported by the chamber or a housing of the cycler,
• at least one temperature sensor,
• a pump supported by the chamber or a housing of the cycler, and
• a control unit operable with the weigh scale, the heater, the plurality of valves and the pump;
• and
• a disposable set including
• a PD fluid container sized to fit within the chamber so as to be weighed by the weigh scale and heated by the heater, the PD fluid container including a fresh PD fluid end and a used PD fluid end,
• a supply line in fluid communication with the fresh PD fluid end and extending outside of the chamber,
• a drain line in fluid communication with the used PD fluid end and extending outside of the chamber, and
• a patient line positioned on an opposing side of the pump from the supply line and the drain line,
• wherein the control unit is configured to operate the plurality of valves and the pump bidirectionally to pump (i) used dialysis fluid from the patient line, through the drain line, to the used PD fluid end of the PD fluid container and (ii) fresh dialysis fluid from the fresh PD fluid end of the PD fluid container, through the supply line, and through the patient line,
• wherein the control unit is further configured to receive output signals from the at least one temperature sensor and weight signals from the weigh scale and stop the pump when the weigh scale records a prescribed patient fill volume worth of the fresh dialysis fluid as having left the PD fluid container.