Water management system for use in dialysis

Patent metadata

Field	Value
Publication number	US-2016166753-A1
Application number	US-201414566677-A
Country	US
Kind code	A1
Filing date	Dec 10, 2014
Priority date	Dec 10, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

A water management system for use in dialysis. The water management system includes apparatuses to generate purified water, and a reservoir for storing the purified water. The reservoir can be connected to a dialysate flow loop and the purified water can be generated, stored, and used for later cleaning and disinfection of the dialysis flow loop and the components thereon.

First claim

We claim:

1 . A water management system for use in sorbent dialysis comprising:
a rinse water reservoir configured to receive water obtained from a sorbent cartridge, wherein the rinse water reservoir is fluidly connectable to one or more valves in a dialysate circuit defining a fluid flow path; wherein the one or more valves are fluidly connectable to a water source and the sorbent cartridge; and a drain wherein the drain is fluidly connectable to one or more valves; wherein the one or more valves are fluidly connectable to a dialysis circuit.

2 . The water management system of claim 1 wherein the water management system is part of a controlled compliant dialysis circuit.

3 . The water management system of claim 1 , wherein the water source is a source water reservoir.

4 . The water management system of claim 1 , wherein the drain comprises a waste reservoir.

5 . The water management system of claim 1 further comprising a microbial filter positioned in a fluid flow path after the sorbent cartridge and before a dialyzer, wherein the microbial filter is fluidly connectable to the rinse water reservoir.

6 . The water management system of claim 1 further comprising one or more pumps to direct the fluid in the fluid flow path.

7 . The water management system of claim 6 further comprising a programmable controller to control the valves and pumps.

8 . A method of filling a rinse water reservoir of a water management system comprising the step of:
directing water from a water source, through a sorbent cartridge, and then into the rinse water reservoir.

9 . The method of claim 8 further comprising the step of directing water through a microbial filter prior to the step of directing water into the rinse water reservoir.

10 . The method of claim 8 wherein the water from the water source travels through a dialysate circuit defining a fluid flow path before flowing into the rinse water reservoir.

11 . The method of claim 10 further comprising the step of directing water from the water source through the lines of the dialysis system and into a drain prior to the step of directing water from the water source through the sorbent cartridge and into the rinse water reservoir.

12 . The method of claim 11 wherein the step of directing water from the water source through the lines of the dialysis system and into a drain is repeated multiple times prior to directing water into the rinse water reservoir.

13 . The method of claim 11 wherein the step of directing water from the water source through the lines of the dialysis system and into a drain is repeated a pre-set number of times.

14 . The method of claim 13 wherein the step of directing water from the water source through the lines of the dialysis system and into a drain is repeated any of 2, 3, 4, 5 or 6 times.

15 . The method of claim 11 further comprising the step of taking a conductivity measurement after directing water from the water source through the lines of the dialysis system and into a drain ; and wherein the step of directing water from the water source through the lines of the dialysis system and into a drain is repeated until the conductivity measurement shows a conductivity below a pre-set number.

16 . The method of claim 8 wherein a programmable controller operates one or more pumps and one or more valves to direct the filling of the rinse water reservoir.

17 . A method of disinfecting a dialysis system comprising the steps of:
directing purified water from a rinse water reservoir through the lines of the dialysis system, wherein the purified water has passed through a sorbent cartridge prior to the purified water being placed in the rinse water reservoir; and circulating heated purified water through the system.

18 . The method of claim 17 further comprising the steps of:
attaching a citric acid cartridge to the dialysis system;
directing water from the water rinse reservoir through the citric acid cartridge to create a citric acid solution; and
heating the citric acid solution and circulating the citric acid solution through the lines of the system.

19 . The method of claim 18 , wherein the system is heated to a temperature between any of 60-100° C., 60-75° C., 65-90° C., 75-85° C. or 85-100° C. while circulating the fluid.

20 . The method of claim 17 further comprising the step of blowing out the lines of the dialysis system with air prior to directing water from the water rinse reservoir through the lines of the system.

21 . The method of claim 18 wherein the citric acid cartridge contains dry citric acid.

22 . The method of claim 21 wherein the citric acid cartridge contains a predetermined amount of citric acid, and further comprising the step of dissolving the citric acid with the water directed through the citric acid cartridge to create a citric acid solution of a predetermined concentration.

Assignees

• Medtronic Inc

Inventors

• Meyer Thomas E

Classifications

• A61M1/1682 Primary

  both machine and membrane module, i.e. also the module blood side · CPC title

• A61M1/1621

  Constructional aspects thereof (semi-permeable membranes for separation processes characterised by their properties B01D69/00; semi permeable membranes characterised by their material B01D71/00) · CPC title

• A61M1/1656 Primary

  Apparatus for preparing dialysates · CPC title

• A61M1/1688

  with recirculation of the sterilising fluid · CPC title

• A61M1/168

  Sterilisation or cleaning before or after use · CPC title