Peritoneal dialysis system using disinfection

Patent metadata

Field	Value
Publication number	US-12594368-B2
Application number	US-202117563860-A
Country	US
Kind code	B2
Filing date	Dec 28, 2021
Priority date	Dec 29, 2020
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

A peritoneal dialysis (“PD”) system includes a housing; a dialysis fluid pump housed by the housing and including a reusable pump body that accepts PD fluid for pumping; a dialysis fluid inline heater housed by the housing and including a reusable heater body that accepts PD fluid for heating; at least one reusable PD fluid line extending from the housing; at least one disinfection connector supported by the housing and configured to accept one of the at least one reusable PD fluid line; and a control unit configured to run a disinfection sequence after a PD treatment, wherein each of the at least one reusable PD fluid line is connected to one of the at least one disinfection connectors, and wherein at least one of the dialysis fluid pump or the dialysis fluid inline heater is actuated by the control unit during the disinfection sequence.

First claim

The invention is claimed as follows:

1 . A peritoneal dialysis system comprising:
a housing; a dialysis fluid pump housed by the housing and including a reusable pump body that accepts PD fluid for pumping; a dialysis fluid inline heater housed by the housing and including a reusable heater body that accepts PD fluid for heating; at least one reusable PD fluid line extending from the housing; at least one disinfection connector supported by the housing and configured to accept one of the at least one reusable PD fluid line; a control unit configured to run a disinfection sequence after a PD treatment, wherein each of the at least one reusable PD fluid line is connected to one of the at least one disinfection connectors, and wherein at least one of the dialysis fluid pump and the dialysis fluid inline heater is actuated during the disinfection sequence; at least one of a reusable patient line or reusable drain line and at least one of
(i) a patient line connector supported by the housing, the patient line connector configured to accept the reusable patient line for running the disinfection sequence, or
(ii) a drain line connector supported by the housing, the drain line connector configured to accept the reusable drain line for running the disinfection sequence; and
at least one spool located within the housing, the at least one spool configured to automatically retract at least one of (i) the reusable patient line when the patient line is connected to the patient line connector or (ii) the reusable drain line when the drain line is connected to the drain line connector.

2 . The PD system of claim 1 , wherein the control unit is configured to cause (i) the dialysis fluid inline heater to heat the PD fluid to at least 70° C. and (ii) the dialysis fluid pump to recirculate the heated PD fluid during the disinfection sequence.

3 . The PD system of claim 1 , wherein the dialysis fluid pump is a piston, gear, membrane or centrifugal pump, the reusable pump body of the piston, gear, membrane or centrifugal pump accepting PD fluid for pumping.

4 . The PD system of claim 1 , wherein the dialysis fluid pump is volumetrically inherently accurate.

5 . The PD system of claim 1 , which includes a pressure sensor located downstream from the dialysis fluid pump, the pressure sensor providing pressure feedback to the control unit, the pressure feedback used by the control unit to control a pressure of the PD fluid pumped by the dialysis fluid pump.

6 . The PD system of claim 5 , wherein the control unit controls electrical current to the dialysis fluid pump to control the pressure of the PD fluid.

7 . The PD system of claim 1 , which includes a temperature sensor located downstream from the dialysis fluid inline heater, the temperature sensor providing temperature feedback to the control unit, the temperature feedback used by the control unit to control a temperature of the PD fluid heated by the dialysis fluid inline heater.

8 . The PD system of claim 1 , which includes an air trap located downstream from the dialysis fluid inline heater, the air trap configured to collect air removed from dialysis fluid heated by the dialysis fluid inline heater and/or from a PD fluid container.

9 . The PD system of claim 8 , which includes at least one level sensor positioned and arranged to detect dialysis fluid within the air trap, the at least one level sensor providing an output to the control unit, the control unit configured to use the output to control a dialysis fluid level within the air trap.

10 . The PD system of claim 1 , which includes a conductivity sensor in fluid communication with the dialysis fluid pump, the conductivity sensor providing an output to the control unit, the control unit configured to use the output to at least one of (i) ensure fresh PD fluid is of a prescribed type or (ii) analyze used PD fluid for treatment effectiveness and/or patient disease.

11 . The PD system of claim 1 , which includes a plurality of dialysis fluid valves, each dialysis fluid valve including a reusable valve body that occludes or allows PD fluid to flow through the reusable valve body, the plurality of valves including at least one of (i) at least one first valve between each of the at least one reusable PD fluid lines and the dialysis fluid inline heater, (ii) a second valve between the dialysis fluid inline heater and the dialysis fluid pump, or (iii) at least one third valve provided along a disinfection line in fluid communication with the at least one disinfection connector.

12 . The PD system of claim 1 , wherein the reusable patient line is a dual lumen patient line.

13 . The PD system of claim 1 , which includes a disposable filter set configured to interface between the reusable patient line and a patient's transfer set, the disposable filter set providing a final stage of PD fluid filtration prior to delivery to the patient, and wherein the final stage of PD fluid filtration is optionally sterile filtration.

14 . The PD system of claim 1 , wherein at least one of (i) the reusable patient line when plugged into the patient line connector forms part of a disinfection loop for the disinfection sequence or (ii) the reusable patient line is coated with a non-sticking or smooth coating.

15 . The PD system of claim 14 , wherein the disinfection loop further includes at least one of (i) a first fluid line leading from the at least one reusable PD fluid line to the reusable heater body, (ii) a second fluid line leading from the reusable heater body to the reusable pump body, or (iii) a third fluid line leading from the reusable pump body to the reusable patient line.

16 . The PD system of claim 1 , which includes a dual lumen connector allowing a disinfection loop to be formed with an associated line removed from the connector, wherein the connector is optionally a drain line connector.

17 . The PD system of claim 1 , which includes a source of flush flow fluid and at least one flush flow line for communicating the flush flow fluid from the source to the dialysis fluid pump, wherein the source of flush flow fluid includes a mechanism to heat PD fluid to form steam or water vapor, and a condenser for condensing the steam or water vapor into the flush flow fluid.

18 . The PD system of claim 1 , which includes at least one of a flow switch or a pressure sensor positioned between the dialysis fluid pump and the at least one reusable PD fluid line, and wherein the control unit is configured to use at least one output from the at least one flow switch or pressure sensor to detect an empty or no flow condition of a PD fluid container in fluid communication with one of the at least one reusable PD fluid line.

19 . The PD system of claim 18 , wherein the control unit is further configured to use an output from the pressure sensor in a fluid volume delivered determination for the dialysis fluid pump.

20 . A peritoneal dialysis (“PD”) system comprising:
a housing;
a dialysis fluid pump housed by the housing and including a reusable pump body that accepts PD fluid for pumping;
a dialysis fluid inline heater housed by the housing and including a reusable heater body that accepts PD fluid for heating;
a reusable patient line extending from the housing;
a patient line connector supported by the housing, the patient line connector configured to accept the patient line for running disinfection sequence;
a control unit configured to run a disinfection sequence after a PD treatment, wherein the reusable patient lin

Assignees

• Baxter Int Inc
• Baxter Healthcare Sa

Inventors

• Jansson Olof
• Holmer Mattias
• Ekdahl Olof
• Forsal Innas
• Nilsson Roger
• Hall Henrik
• Ericson Bjorn
• Alson Jonas
• Pettersson Michael
• Fallman Oskar Erik Frode Styrbjorn
• Hansson Jimmie

Classifications

• A61M2209/082

  Mounting brackets, arm supports for equipment · CPC title

• A61M2205/3673

  thermo-electric, e.g. Peltier effect, thermocouples, semi-conductors · CPC title

• A61M2205/3379

  Masses, volumes, levels of fluids in reservoirs, flow rates · CPC title

• A61M2205/3355

  Controlling downstream pump pressure · CPC title

• A61M1/1672

  using membrane filters, e.g. for sterilising the dialysate · CPC title