Dialysis machine and method of checking the functionality of a dialysis machine

• US 6,811,707 B2
• Filed: 05/28/2002
• Issued: 11/02/2004
• Est. Priority Date: 09/29/2000
• Status: Expired due to Term

• Current Assignee: Gambro Dasco SPA (Baxter International Inc.)
• Original Assignee: Gambro Dasco SPA (Baxter International Inc.)
• Inventors: Rovatti, Paolo, Vasta, Alessandro
• Primary Examiner(s): Kim, John
• Application Number:
  US10/148,132
• Publication Number:
  US 20020179505A1
• Time in Patent Office: 889 Days
• Field of Search: 210/85, 210/96.1, 210/96.2, 210/102, 210/134, 210/141, 210/143, 210/321.79, 210/646, 210/739, 210/321.71, 340/500, 340/506, 340/517, 340/825.06, 340/825.36, 602/FOR.115, 602/FOR.134, 602/FOR.135
• US Class Current: 210/739
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: G16H 10/40 for data related to laboratory analysis, e.g. patient specimen analysis
• CPC Class Codes: G16H 20/40 relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture
• CPC Class Codes: G16H 40/63 for local operation

Abstract

A dialysis machine may include a main control unit provided with a memory that stores the parameters of a dialysis treatment carried out on a patient and a plurality of slave control units interacting with the main control unit. The slave control unit may provide the control of the dialysis treatment carried out on the patient. A functionality checking unit may include a memory that stores dialysis treatment parameters and interacts with the main control unit to carry out checking of the functionality of the dialysis machine. At predetermined intervals of time, the functionality checking unit may send the dialysis treatment parameters stored in its memory to the main control unit, and the main control unit may compare the dialysis treatment parameters stored in its memory with those sent from the functionality checking unit, and generate an alarm signal if the dialysis treatment parameters do not coincide with each other.

Claims

1. Dialysis machine, comprising:

main control means provided with memory means which store the parameters of the dialysis treatment carried out on a patient by means of the said dialysis machine;

slave control means interacting with the said main control means to provide the control of the dialysis treatment carried out on the patient; and

means of checking the functionality provided with memory means which store the dialysis treatment parameters, and interact with the said main control means to carry out the checking of the functionality of the said dialysis machine, the said means of checking the functionality comprising transmission means for sending to the said main control means the dialysis treatment parameters stored in the memory means of said means of checking the functionality when predetermined conditions are detected;

wherein the said main control means comprise comparison means for comparing with each other the dialysis treatment parameters stored in the memory means of the said means of checking the functionality and the dialysis treatment parameters stored in the memory means of the said main control means, and signal generator means for generating an alarm signal if the said dialysis treatment parameters do not coincide with each other.

3. Dialysis machine according to claim 1, characterized in that the said transmission means send to said main control means the dialysis treatment parameters stored in the memory means of the functionality checking means at predetermined intervals of time.

4. Dialysis machine according to any one of claims 1 and 2, characterized in that it also comprises display means connected to said main control means to display a message indicating a malfunction of the said dialysis machine on receipt of the said alarm signal.

5. Dialysis machine according to claim 1 or claim 2, characterized in that said main control means includes at least a main control microprocessor and in that said memory means includes a plurality of memories connected to the main microprocessor.

6. Dialysis machine according to claim 5, characterized in that said plurality of memories are virtually or physically separated and operationally independent of each other.

7. Dialysis machine according to claim 6, characterized in that the main control microprocessor at least duplicates the multitude of dialysis treatment parameters, each copy of the dialysis treatment parameters is separated from the other and is stored in a corresponding of the virtually or physically separated memories.

8. Dialysis machine according to claim 1 or claim 2, characterized in that the slave control means includes a plurality of slave control units.

9. Dialysis machine according to claim 8, characterized in that each slave control unit comprises a slave control microprocessor and a memory connected to the slave control microprocessor.

10. Dialysis machine according to claim 9, characterized in that it comprises sensors located at various points of the dialysis circuit to measure quantities relating to the dialysis treatment, the slave control microprocessors being connected bi-directionally to a main control microprocessor, for storing in the memories copy of the respective parameters of the dialysis treatment or of the parameters relating to the operation of the parts of the dialysis circuit for which a corresponding one of said slave control microprocessors provides control, the slave control microprocessors also receiving at their inputs the measurement signals generated by the sensors, for providing control of corresponding parts of the dialysis circuit or of the corresponding processes connected with the dialysis treatment to which they are dedicated.

11. Dialysis machine according to claim 9, characterized in that the memories store copy of the respective parameters of the dialysis treatment or of the parameters relating to the operation of the parts of the dialysis circuit for which the corresponding slave control microprocessor provides control.

12. Dialysis machine according to claim 1 or claim 2, characterized in that means of checking the functionality includes a functionality checking unit, which is distinct and physically separate from the main control means 10 and interacts with the latter.

13. Dialysis machine according to claim 12, characterized in that the functionality checking unit comprises a functionality checking microprocessor and a memory which is connected to the functionality checking microprocessor and which stores the copy of the parameters of the dialysis treatment received by the main control microprocessor.

14. Dialysis machine according to claim 13, characterized in that it comprises sensors located at various points of the dialysis circuit to measure quantities relating to the dialysis treatment, the functionality checking microprocessor being connected bi-directionally to the main control microprocessor and receiving at its input both copy of the parameters stored in the memory means and the measurement signals generated by the sensors and being able to compare them for the purpose of constantly checking the correctness of the operation of the slave microprocessors.

15. Dialysis machine according to claim 10, characterized in that, at least for a predetermined number of parameters, the corresponding sensors are duplicated so that a first sensor for each respective parameter sends its input to the slave control microprocessor and a second sensor detecting the same parameter sends its input to the functionality checking microprocessor.

16. Dialysis machine according to claim 14, characterized in that the functionality checking microprocessor, at predetermined instants of time is capable of sending a copy of the dialysis treatment parameters stored in its memory to the main control microprocessor, which acquires these parameters and then compares the copy of the dialysis treatment parameters from the functionality checking microprocessor with the original dialysis treatment parameters stored in each of its memories, the main control microprocessor generating an alarm signal if the dialysis treatment parameters sent from the functionality checking microprocessor do not coincide with the dialysis treatment parameters stored in each of the memories of the main control microprocessor.

17. Dialysis machine according to claim 15 characterized in that the functionality checking unit receives at its inputs and stores in its memories:

copy of the treatment parameters present in the memories,

the measurements detected by its own sensors or sensing sources, and

via the main control unit copy of the measurement signals acquired by the sensors or sensing sources associated to each slave control unit.

25. Dialysis machine according to claim 14, characterized in that, at least for a predetermined number of parameters, the corresponding sensors are duplicated so that a first sensor for each respective parameter sends its input to the slave control microprocessor and a second sensor detecting the same parameter sends its input to the functionality checking microprocessor.

26. Dialysis machine according to claim 25 characterized in that the functionality checking unit receives at its inputs and stores in its memories:

copy of the treatment parameters present in the memories,

the measurements detected by its own sensors or sensing sources, and

via the main control unit copy of the measurement signals acquired by the sensors or sensing sources associated to each slave control unit.

2. Dialysis machine, comprising:

main control means provided with memory means which store the parameters of the dialysis treatment carried out on a patient by means of said dialysis machine;

slave control means interacting with the main control means to provide control of a dialysis treatment carried out on a patient; and

means of checking the functionality provided with memory means which store a copy of the dialysis treatment parameters, and interact with the said main control means to carry out the checking of the functionality of the said dialysis machine, said means of checking the functionality being capable of sending to said main control means the dialysis treatment parameters stored in the memory means of said means of checking the functionality;

said main control means periodically comparing with each other the dialysis treatment parameters stored in the memory means of the said means of checking the functionality and the dialysis treatment parameters stored in the memory means of the said main control means and being able to cause an alarm signal generation if the dialysis treatment parameters stored in the memory means of the said means of checking the functionality and the dialysis treatment parameters stored in the memory means of the said main control means are different.

18. Method of checking the functionality of a dialysis machine, said dialysis machine including:

main control means provided with memory means which store the parameters of the dialysis treatment carried out on a patient by means of the said dialysis machine;

slave control means interacting with the said main control means for controlling the dialysis treatment carried out on the patient; and

means of checking the functionality provided with memory means;

said method comprising the following steps

storing the dialysis treatment parameters in the said memory means of the said means of checking the functionality;

when predetermined conditions are detected, comparing the dialysis treatment parameters stored in the memory means of the said means of checking the functionality with the dialysis treatment parameters stored in the memory means of the said main control means; and

generating an alarm signal if the said parameters do not coincide with each other.

19. Method of checking according to claim 18, characterized in that the said step of comparing comprises the step of sending to the said main control means the dialysis treatment parameters stored in the memory means of the said means of checking the functionality when the said predetermined conditions are detected.

20. Method of checking according to claim 18 or 19, characterized in that the said step of comparing is carried out at predetermined intervals of time.

21. Method of checking according to claim 18 or claim 19, characterized in that it also comprises the step of:

displaying on display means of the said dialysis machine a message indicating a malfunction of the said dialysis machine when the said alarm signal is detected.

27. Method of checking according claim 20, further comprising:

displaying on display means of the said dialysis machine a message indicating a malfunction of the said dialysis machine when the said alarm signal is detected.

22. Method of checking the functionality of a dialysis machine, said dialysis machine including:

a dialysis circuit;

a plurality of sensors, located at various points of the dialysis circuit to measure quantities relating to the dialysis treatment;

main control means provided with memory means which store the parameters of the dialysis treatment to be carried out on a patient by means of the said dialysis machine;

slave control means interacting with the said main control means for controlling the dialysis treatment carried out on the patient; and

means of checking the functionality provided with memory means;

said method comprising the following steps

storing copy of the dialysis treatment parameters in the said memory means of the said means of checking the functionality;

at prefixed time intervals, comparing the dialysis treatment parameters stored in the memory means of the said means of checking the functionality with the dialysis treatment parameters stored in the memory means of the said main control means; and

generating an alarm signal if the said parameters do not coincide with each other.

23. Method of checking the functionality according to claim 22, characterized in that it comprises the following step:

storing in the memories copy of the respective parameters of the dialysis treatment or of the parameters relating to the operation of the parts of the dialysis circuit for which the corresponding slave control microprocessor provides control, the slave control microprocessor also receiving at their inputs the measurement signals generated by the sensors, for providing control of corresponding parts of the dialysis circuit or of the corresponding processes connected with the dialysis treatment to which they are dedicated.

24. Method of checking the functionality according to claim 22, characterized in that it comprises the following step:

comparing the measurement signals generated by the sensors and the dialysis treatment parameters in said memory means of said means of checking the functionality for the purpose of constantly checking the correctness of the operation of the slave microprocessors.