System and a method for producing microbiologically controlled fluid

Patent metadata

Field	Value
Publication number	US-11718546-B2
Application number	US-201716610384-A
Country	US
Kind code	B2
Filing date	Nov 6, 2017
Priority date	May 6, 2016
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

A method and a system comprising an integrated water purifying apparatus with a pre-filter circuit including a particle filter and an activated carbon filter arranged to produce pre-treated water; a fluid circuit arranged to receive pre-treated water from the pre-filter circuit, the fluid circuit including an RO-pump and a Reverse Osmosis (RO) device arranged to produce purified water; a heating device arranged to heat purified water from the RO device to a temperature above 65°0 C.; the water purifying apparatus further arranged to heat disinfect the fluid circuit using the heated purified water. The system further comprises a line set connected to the purified water outlet connector at a water line connector of the line set, wherein the line set includes at least one sterile sterilizing grade filter arranged to further filter the purified water.

First claim

The invention claimed is:

1. A system comprising:
a line set connected to a purified water outlet connector, wherein the line set includes at least one sterilizing filter; and
a water purifying apparatus fluidly connected with the line set, the water purifying apparatus including
(i) a pre-filter circuit connected to a water inlet for receiving water from a water source, wherein the pre-filter circuit includes a particle filter and an activated carbon filter, wherein each of the particle filter and the activated carbon filter are arranged to filter water received via the water inlet to produce pre-treated water,
(ii) a fluid circuit arranged to receive pre-treated water from the pre-filter circuit and to produce purified water, wherein the fluid circuit includes
a pump,
a reverse osmosis device, and
a heating device arranged to heat purified water output from the reverse osmosis device to a temperature above 65° C., and

(iii) the purified water outlet connector, wherein the water purifying apparatus is configured to
pump pre-treated water through the reverse osmosis device using the pump,
produce purified water using the reverse osmosis device,
disinfect the fluid circuit using the heated purified water output from the heating device, and
after heat disinfection is completed, output purified water through the purified water outlet connector,

wherein the at least one sterilizing filter of the line set is arranged to further filter the purified water.

2. The system according to claim 1 , wherein the line set is a reusable line set.

3. The system according to claim 1 , wherein the fluid circuit is arranged to produce purified water having an amount of bacteria that is less than 100 Colony-Forming Units/mL and an amount of bacterial endotoxins that is less than 0.25 Endotoxin Units/mL.

4. The system according to claim 1 , wherein the at least one sterilizing filter is arranged to further filter the purified water into sterile purified water having an amount of bacteria that is zero Colony-Forming Units/mL and an amount of bacterial endotoxins that is less than 0.05 Endotoxin Units/mL.

5. The system according to claim 1 , wherein the fluid circuit further includes a polisher device arranged to treat the purified water from the reverse osmosis device and output further purified water, wherein the fluid circuit is arranged to output the further purified water through the water outlet connector.

6. The system according to claim 1 , wherein the line set further includes a drain line connected at a drain line connector of the drain line to a drain connector of the water purifying apparatus, wherein the water purifying apparatus further includes a first drain path connected to the drain connector for transporting drain fluid received from the drain line to a drain.

7. The system according to claim 6 , wherein the water purifying apparatus is arranged to disinfect the drain connector and the water outlet connector of the water purifying apparatus using the heated purified water.

8. The system according to claim 1 , wherein the water purifying apparatus includes a control unit programmed to
periodically instruct the water purifying apparatus to heat the purified water flowing in the fluid circuit by means of the heating device to a temperature above 65° C.; and
control heat disinfection of the fluid circuit using the heated water such that a certain disinfection criterion is met.

9. The system according to claim 8 , wherein the control unit is programmed to instruct the water purifying apparatus to heat purified water flowing in the fluid circuit by means of the heating device and to output the heated purified water through the purified water outlet connector to the line set for heat disinfection of the line set.

10. The system according to claim 1 , further comprising
at least one concentrate source; and
a cycler including
a control unit,
a pump actuator arranged to be controlled by the control unit, wherein the line set is operable with the cycler, and wherein the line set further includes
a pumping cassette including a pump chamber configured to be actuated by the pump actuator, and
a mixing container in fluid communication with the pumping cassette, and

a memory storing instructions, which when executed by the control unit, cause the control unit to
cause the pump actuator to operate the pump chamber to pump a first amount of the purified water to the mixing container, and
cause the pump actuator to operate the pump chamber to pump a prescribed amount of the at least one concentrate from the at least one concentrate source to the mixing container.

11. The system according to claim 10 , wherein the instructions further cause the control unit to cause the pump actuator to circulate heated purified water in the line set to perform heat disinfection of the line set.

12. A method for producing microbiologically controlled fluid using a system comprising a water purifying apparatus including a heat disinfected fluid circuit arranged for producing purified water and a line set connected to a purified water outlet connector of the water purifying apparatus for transporting the purified water to a point of use, wherein the method comprises:
treating water from a water source with a reverse osmosis unit of the fluid circuit to produce purified water, wherein the purified water includes an amount of bacteria that is less than 100 Colony-Forming Units/mL and an amount of bacterial endotoxins that is less than 0.25 Endotoxin Units/mL; and
directing the purified water through the purified water outlet connector and through the connected line set to produce sterile purified water, wherein the connected line set includes at least one sterilizing filter, and wherein the sterile purified water includes an amount of bacteria that is zero Colony-Forming Units/mL and an amount of bacterial endotoxins that is less than 0.05 Endotoxins Units/mL.

13. The method according to claim 12 , further comprising treating the water from the water source with a particle filter and an activated carbon filter prior to treating the water with the reverse osmosis unit.

14. The method according to claim 12 , wherein the system further comprises a cycler, and the method further comprises:
causing a pump actuator of the cycler to operate a pump chamber of the line set to pump a first amount of the purified water to a mixing container of the line set; and
causing the pump actuator to operate the pump chamber to pump a prescribed amount of at least one concentrate from at least one concentrate source to the mixing container.

15. The method according to claim 12 , further comprising:
heating the produced purified water to a temperature above 65° C.;
directing the heated purified water through the purified water outlet connector; and
circulating the heated purified water in the line set to perform heat disinfection of the line set.

16. The method according to claim 12 , comprising treating purified water from the reverse osmosis unit with a polisher device.

17. A water purifying apparatus comprising:
a pump;
a fluid circuit including a purified water outlet connector;
a reverse osmosis device;
a heating device; and
a non-transitory, computer-readable medium storing instructions which, when performed by a processor, cause the processor to:
cause the pump to pump pre-treated water in the fluid circuit through the reverse osmosis device to produce purified water;
periodically instruct the heating device to heat purified water flowing in the fluid circuit to a temperature above 65°

Assignees

• Baxter Int
• Baxter Healthcare Sa

Inventors

• Wieslander Anders
• Jansson Olof
• Wictor Per-Ola
• Wellings Anders
• Jeppsson Helena

Classifications

• A61M2205/276

  preventing unwanted use · CPC title

• C02F9/00 Primary

  Multistage treatment of water, waste water or sewage · CPC title

• A61M1/1605

  Physical characteristics of the dialysate fluid · CPC title

• A61M1/166

  Heating (for sterilisation A61M1/1686) · CPC title

• A61M1/1656 Primary

  Apparatus for preparing dialysates · CPC title