Method and system for inlet temperature monitoring for centralized heat disinfection of dialysis machine inlet lines

• US 8,506,885 B2
• Filed: 05/17/2012
• Issued: 08/13/2013
• Est. Priority Date: 06/01/2011
• Status: Active Grant

• Current Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius Medical Care AG)
• Original Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius Medical Care AG)
• Inventors: Kotsos, Michael Emmanuel, Wang, Fei, Crnkovich, Martin Joseph
• Primary Examiner(s): BASS, DIRK R
• Application Number:
  US13/474,022
• Publication Number:
  US 20120308431A1
• Time in Patent Office: 453 Days
• Field of Search: 210/636, 210/645, 210/646, 210/764, 210/767, 422/3, 422/105
• US Class Current: 422/3
• CPC Class Codes: A61M 1/1686 by heat
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 2205/3561 local, e.g. within room or hospital
• CPC Class Codes: A61M 2205/3584 using modem, internet or bluetooth
• CPC Class Codes: A61M 2205/3592 using telemetric means, e.g. radio or optical transmission

Abstract

A method for inlet temperature monitoring for centralized heat disinfection of dialysis machine inlet lines is described. The method can be used, for example, for a dialysis system which has a central water processing system used at a multiple patient dialysis treatment clinic or center. A central water processing system and a plurality of dialysis machines having fluid inlets are fluidly connected to a water supply loop which circulates heated water from the central water processing system to the dialysis machines and back to the central water processing system. A dialysis system for centralized heat disinfection of dialysis machine inlet lines of dialysis machines supplied with water by a central water processing system also is provided.

Claims

1. A method for centralized heat disinfection control for a dialysis system, comprising:

providing a central water processing system, a plurality of dialysis machines having fluid inlets which are fluidly connected to a water supply loop which circulates heated water from the central water processing system to fluid inlets of the dialysis machines and back to the central water processing system;

supplying heated water to the loop from the central water processing system;

sensing water temperature with temperature sensors at the fluid inlets of the plurality of dialysis machines on the loop; and

communicating data on the sensed temperature at the fluid inlets of the dialysis machines to a process controller capable of (i) comparing the sensed temperature to a predetermined value or value range selected for disinfection, and (ii) issuing an alarm or controlling the temperature controller for adjusting water temperature of water at the central water processing system when a sensed inlet water temperature of a dialysis machine does not meet the predetermined value or value range, or both.

2. The method of claim 1, wherein the sensing, communicating, comparing and issuing/controlling steps can be repeated in an iterative manner during the centralized heat disinfection of the fluid inlets.

3. The method of claim 1, wherein the adjusting of the water temperature comprises increasing the water temperature of water at the central water processing system relative to the sensed water temperature at the fluid inlet of the dialysis machine which raised the alarm when a sensed inlet water temperature of a dialysis machine is below the predetermined value or value range.

4. The method of claim 1, further comprising issuing an alarm comprising an audible alarm or an optical alarm, or both, when a sensed inlet water temperature of a dialysis machine is either above or below the predetermined value or value range.

5. The method of claim 1, further comprising conducting of diagnostics on the fluid inlet of a dialysis machine by one of the process controller and temperature controller on the dialysis machine which raised the alarm.

6. The method of claim 1, wherein the predetermined value or value range selected for disinfection is a minimum temperature greater than 85°

C.

7. The method of claim 1, wherein the predetermined value or value range selected for disinfection is a temperature of greater than 85°

C. and less than 100°

C.

8. The method of claim 1, wherein the process controller comprises an automatic programmable controller.

9. The method of claim 1, wherein the temperature controller is controllable by the process controller.

10. The method of claim 1, wherein the temperature controller comprises a manual controller controllable by a human operator.

11. The method of claim 1, wherein the loop comprises at least one subloop having at least one dialysis machine thereon.

12. The method of claim 1, wherein the temperature sensors are located inside housings of the dialysis machines where the fluid inlets make a connection with the machines.

13. The method of claim 1, further comprising integrating the inlet temperature monitoring and process control with a local disinfection program conducted at one or more of the dialysis machines.

14. A dialysis system with centralized heat disinfection control, comprising:

a central water processing system comprising a temperature controller;

a plurality of dialysis machines having fluid inlets which comprise temperature sensors for sensing water temperature;

a fluid supply loop capable of circulating heated water from the central water processing system to the fluid inlets of the plurality of dialysis machines and back to the central water processing system, wherein the at least one temperature sensor senses temperature of fluid supplied from the loop to the fluid inlets; and

a process controller is capable of (a) receiving data on sensed temperatures from the temperature sensors at the fluid inlets of the dialysis machines, (b) comparing the sensed temperatures to a predetermined value or value range selected for disinfection, and (c) issuing an alarm or controlling the temperature controller for adjusting water temperature of water at the central water processing system when a sensed inlet water temperature of a dialysis machine does not meet the predetermined value or value range, or both.

15. The system of claim 14, wherein the dialysis system further is capable of performing the sensing, communicating, comparing and issuing/controlling functions in an iterative manner during a centralized heat disinfection of the dialysis machine inlet lines.

16. The system of claim 14, wherein the process controller comprises a programmable central processing unit (CPU).

17. The system of claim 14, further comprising a wired or wireless communication system providing data transfer between the process controller and the dialysis machines, and control communications between the process controller and the temperature controller of the central water processing system.

18. The system of claim 14, wherein the communication system comprises an ethernet connection.

19. The system of claim 14, wherein the loop comprises at least one subloop having at least one dialysis machine thereon.

20. The system of claim 14, wherein the temperature sensors are located inside housings of the dialysis machines where the fluid inlets make a connection with the machines.

21. The system of claim 14, wherein each dialyzer machine further comprises a functional processor board in bidirectional communication with the process controller.

22. The system of claim 14, wherein central water processing system further comprises a pump unit for moving the heated water through the loop.

23. The system of claim 14, further comprising an integration of the inlet temperature monitoring and process control with a local disinfection or heater program conducted at one or more of the dialysis machines.