Dialysis system including a flow path insulator

6:

• A peritoneal dialysis system comprising:
• a cycler;
• a disposable set including a patient line and a drain line, the cycler configured to pump fresh dialysis fluid to a patient via the patient line and used dialysis fluid from the patient via the drain line;
• one of (i) a water purifier for supplying purified water for mixing to form fresh dialysis fluid at the disposable set, (ii) at least one fresh dialysis fluid container provided as part of the disposable set for supplying fresh dialysis fluid, or (iii) a dialysis fluid preparation unit configured to supply fresh dialysis fluid to the disposable set;
• and
• at least one flow path insulator provided at or by at least one of the cycler, the water purifier, the dialysis fluid preparation unit, or along the drain line, the flow path insulator including a first pump positioned and arranged to pump used dialysis fluid through the drain line and a second pump positioned and arranged to introduce air or water into the drain line to create used dialysis fluid flow separating segments to limit current flowing from the patient to a house drain,
• wherein the first pump is provided at the cycler and the second pump is provided at or by the water purifier, the dialysis fluid preparation unit, or along the drain line.

12:

• A peritoneal dialysis system comprising:
• a cycler;
• a disposable set including a patient line and a drain line, the cycler configured to pump fresh dialysis fluid to a patient via the patient line and used dialysis fluid from the patient via the drain line;
• one of (i) a water purifier for supplying purified water for mixing to form fresh dialysis fluid at the disposable set, (ii) at least one fresh dialysis fluid container provided as part of the disposable set for supplying fresh dialysis fluid, or (iii) a dialysis fluid preparation unit configured to supply fresh dialysis fluid to the disposable set;
• and
• at least one flow path insulator provided at or by at least one of the cycler, the water purifier, the dialysis fluid preparation unit, or along the drain line, the flow path insulator including a chamber that receives used dialysis fluid, the chamber hinged via a hinge and configured to tip via weight of the used dialysis fluid so that the used dialysis fluid fills a siphon enough such that head pressure within the siphon causes the used dialysis fluid to flow from the siphon,
• wherein the flow path insulator further includes at least one of (i) a biasing device positioned and arranged to return the chamber to a filling position after tipping or (ii) a switch that switches from a first state to a second state when the first chamber is tipped to prevent flow of used dialysis fluid to the chamber until the switch is returned to the first state.

15:

• A peritoneal dialysis system comprising:
• a cycler;
• a disposable set including a patient line and a drain line, the cycler configured to pump fresh dialysis fluid to a patient via the patient line and used dialysis fluid from the patient via the drain line;
• one of (i) a water purifier for supplying purified water for mixing to form fresh dialysis fluid at the disposable set, (ii) at least one fresh dialysis fluid container provided as part of the disposable set for supplying fresh dialysis fluid, or (iii) a dialysis fluid preparation unit configured to supply fresh dialysis fluid to the disposable set;
• and
• at least one flow path insulator provided at or by at least one of the cycler, the water purifier, the dialysis fluid preparation unit, or along the drain line, the flow path insulator including a first siphon and a second siphon, wherein the system is configured to prevent the first siphon from creating enough head pressure for used dialysis fluid flow from the first siphon to the second siphon until head pressure in the second siphon falls such that used dialysis fluid does not flow from the second siphon, separating used dialysis fluid flowing along the drain line to limit current flowing from the patient to a house drain,
• wherein the first siphon includes a first siphon tube and a first siphon chamber, and the second siphon includes a second siphon tube and a second siphon chamber.

19:

• A peritoneal dialysis system comprising:
• a cycler;
• a disposable set including a patient line and a drain line, the cycler configured to pump fresh dialysis fluid to a patient via the patient line and used dialysis fluid from the patient via the drain line;
• one of (i) a water purifier for supplying purified water for mixing to form fresh dialysis fluid at the disposable set, (ii) at least one fresh dialysis fluid container provided as part of the disposable set for supplying fresh dialysis fluid, or (iii) a dialysis fluid preparation unit configured to supply fresh dialysis fluid to the disposable set;
• and
• at least one flow path insulator provided at or by at least one of the cycler, the water purifier, the dialysis fluid preparation unit, or along the drain line, the flow path insulator including a first chamber having an output directed towards but separate from a second chamber, a first valve upstream from the first chamber and a second valve upstream of the second chamber, the first valve and the second valve sequenced to separate used dialysis fluid flowing along the drain line to limit current flowing from the patient to a house drain,
• wherein the first valve and the second valve are sequenced such that used dialysis fluid flow to the first chamber is prevented if the second valve is open and the second valve is opened when the second chamber is empty.