Portable stimulation screening device for screening therapeutic effect of electrical stimulation on a patient user during normal activities of the patient user

• US 5,893,883 A
• Filed: 04/30/1997
• Issued: 04/13/1999
• Est. Priority Date: 04/30/1997
• Status: Expired due to Term

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Torgerson, Nathan A., Prather, Jean E., Forsberg, John W., Kinghorn, Curtis D.
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US08/847,650
• Time in Patent Office: 713 Days
• Field of Search: 607/46, 607/52, 607/59, 607/62, 607/63, 607/72
• US Class Current: 607/59
• CPC Class Codes: A61N 1/36071 Pain

Abstract

A stimulation device for screening therapeutic effects from electrical stimulation of electrically excitable tissue. The stimulation device includes inputs such that the user can easily select the polarity, amplitude, pulse width, and pulse rate of the respective stimulation signal applied on each of the implanted electrodes. Alternatively, the stimulation device automatically sets those parameters of the stimulation signal with parameters that have historically produced high ratings of therapeutic effect. The user then enters a rating of the therapeutic effect that results from the application of those stimulation signals on the implanted electrodes. The stimulation device is designed to also include a casing such that the stimulation device is adapted to be portable. Because the stimulation device of the present invention is also inexpensive, the user can carry this device around during normal daily activities of the user during the screening process. Consequently, parameters of the stimulation device that would result in optimum therapeutic effect for normal daily activities of the user can be determined more easily and more accurately.

Claims

1. A portable stimulation screening device for screening, during normal activities of a patient user, therapeutic effect on said patient user from electrical stimulation by at least one electrode implanted near electrically excitable tissue of said patient user, said stimulation device comprising:

a signal generator coupled to said at least one electrode;

means for inputting a set of selected parameters that define a respective stimulation signal to be applied on each of said at least one electrode, said set of selected parameters being selected by said patient user;

a control unit, operatively coupled to said signal generator and to said means for inputting said set of selected parameters, for controlling said signal generator to generate said respective stimulation signal, having said set of selected parameters, to be applied on each of said at least one electrode;

means for inputting a corresponding rating of therapeutic effect entered by said patient user for said set of selected parameters, said therapeutic effect resulting from application of said respective stimulation signal, having said set of selected parameters, on each of said at least one electrode; and

a casing that holds components of said portable stimulation screening device and that is adapted to be portable with said patient user such that said patient user carries said portable stimulation screening device and screens said therapeutic effect during normal activities of said patient user.

2. The portable stimulation screening device of claim 1, further comprising:

means for inputting a corresponding normal activity as entered by said patient user, said corresponding normal activity corresponding to said set of selected parameters and said corresponding rating of therapeutic effect.

3. The portable stimulation screening device of claim 1, wherein said casing includes a battery compartment and a battery in said battery compartment, said battery being coupled to the components of said portable stimulation screening device such that said portable stimulation screening device is battery powered.

4. The portable stimulation screening device of claim 1, wherein said means for inputting said set of selected parameters includes:

a respective three input to one output switch, for each of said at least one electrode, each of said three inputs corresponding to a respective one of a positive polarity, a negative polarity, and an off-state polarity of a voltage signal generated by said signal generator, wherein said patient user selects one of said three inputs to select a respective polarity of said voltage signal applied on each of said at least one electrode.

5. The portable stimulation screening device of claim 1, wherein said means for inputting said set of selected parameters includes:

means for allowing said patient user to select preset parameters as said set of selected parameters.

6. The portable stimulation screening device of claim 5, wherein said preset parameters have historically resulted in high ratings of therapeutic effect for a large number of patients.

7. The portable stimulation screening device of claim 5, wherein said preset parameters have historically resulted in high ratings of therapeutic effect for said patient user.

8. The portable stimulation screening device of claim 1, wherein said means for inputting said set of selected parameters includes:

means for inputting a respective amplitude of the respective stimulation signal for each of said at least one electrode, said respective amplitude being selected by said patient user.

9. The portable stimulation screening device of claim 1, wherein said means for inputting said set of selected parameters includes:

means for inputting a respective pulse width of the respective stimulation signal for each of said at least one electrode, said respective pulse width being selected by said patient user.

10. The portable stimulation screening device of claim 1, wherein said means for inputting said set of selected parameters includes:

means for inputting a respective pulse rate of the respective stimulation signal for each of said at least one electrode, said respective pulse rate being selected by said patient user.

11. The portable stimulation screening device of claim 1, wherein said control unit includes:

means for controlling the signal generator to generate the respective stimulation signal having a predetermined set of parameters for each of said at least one electrode when said patient user resets said portable stimulation screening device.

12. The portable stimulation screening device of claim 1, further comprising:

a memory for storing said set of selected parameters and said corresponding rating of therapeutic effect corresponding to said set of selected parameters.

13. The portable stimulation screening device of claim 12, further comprising:

means for determining an optimum set of selected parameters that produced a highest rating of therapeutic effect from all ratings of therapeutic effect stored in said memory.

14. The portable stimulation screening device of claim 1, further comprising:

a display screen for displaying said set of selected parameters and said corresponding rating of therapeutic effect corresponding to said set of selected parameters.

15. The portable stimulation screening device of claim 1, wherein said means for inputting a corresponding rating of therapeutic effect includes:

rating scrolling buttons for allowing said user to scroll through a list of ratings to select said corresponding rating of therapeutic effect from said list of ratings.

16. A portable stimulation screening device for screening, during normal activities of a patient user, therapeutic effect on said patient user from electrical stimulation by at least one electrode implanted near electrically excitable tissue of said patient user, said stimulation device comprising:

a signal generator coupled to said at least one electrode;

means for inputting a set of selected parameters that define a respective stimulation signal to be applied on each of said at least one electrode, said set of selected parameters being selected by said patient user, said means for inputting said set of selected parameters further comprising;

a respective three input to one output switch, for each of said at least one electrode, each of said three inputs corresponding to a respective one of a positive polarity, a negative polarity, and an off-state polarity of a voltage signal generated by said signal generator, wherein said patient user selects one of said three inputs to select a respective polarity of said voltage signal applied on each of said at least one electrode;

means for allowing said patient user to select preset parameters as said set of selected parameters;

means for inputting a respective amplitude of the respective stimulation signal for each of said at least one electrode, said respective amplitude being selected by said patient user;

means for inputting a respective pulse width of the respective stimulation signal for each of said at least one electrode, said respective pulse width being selected by said patient user; and

means for inputting a respective pulse rate of the respective stimulation signal for each of said at least one electrode, said respective pulse rate being selected by said patient user;

a control unit, operatively coupled to said signal generator and to said means for inputting said set of selected parameters, for controlling said signal generator to generate said respective stimulation signal, having said set of selected parameters, to be applied on each of said at least one electrode, said control unit further including;

means for controlling the signal generator to generate the respective stimulation signal having a predetermined set of parameters for each of said at least one electrode when said patient user resets said portable stimulation screening device;

means for inputting a corresponding rating of therapeutic effect entered by said patient user for said set of selected parameters, said therapeutic effect resulting from application of said respective stimulation signal, having said set of selected parameters, on each of said at least one electrode, said means for inputting a corresponding rating of therapeutic effect further including;

rating scrolling buttons for allowing said user to scroll through a list of ratings to select said corresponding rating of therapeutic effect from said list of ratings;

a casing that holds components of said portable stimulation screening device and that is adapted to be portable with said patient user such that said patient user carries said portable stimulation screening device and screens said therapeutic effect during normal activities of said patient user, wherein said casing includes a battery compartment and a battery in said battery compartment, said battery being coupled to the components of said portable stimulation screening device such that said portable stimulation screening device is battery powered;

means for inputting a corresponding normal activity as entered by said patient user, said corresponding normal activity corresponding to said set of selected parameters and to said corresponding rating of therapeutic effect;

a memory for storing said set of selected parameters, said corresponding normal activity, and said corresponding rating of therapeutic effect corresponding to said set of selected parameters;

means for determining an optimum set of selected parameters that produced a highest rating of therapeutic effect from all ratings of therapeutic effect stored in said memory; and

a display screen for displaying said set of selected parameters, said corresponding normal activity, and said corresponding rating of therapeutic effect for said set of selected parameters.

17. A method for screening, during normal activities of a patient user, therapeutic effect on said patient user from electrical stimulation by at least one electrode implanted near electrically excitable tissue of said patient user, said method including the steps of:

A. inputting a set of selected parameters that define a respective stimulation signal to be applied on each of said at least one electrode, said set of selected parameters being selected by said patient user;

B. generating and-applying said respective stimulation signal, having said set of selected parameters, on each of said at least one electrode;

C. inputting a corresponding rating of therapeutic effect as entered by said patient user for said set of selected parameters, said therapeutic effect resulting from application of said respective stimulation signal, having said set of selected parameters, on each of said at least one electrode; and

D. inputting a corresponding normal activity as entered by said patient user, said corresponding normal activity corresponding to said set of selected parameters and said corresponding rating of therapeutic effect.

18. The method of claim 17, wherein said step B further includes the step of:

configuring each of said plurality of electrodes to have a respective one of a positive polarity, a negative polarity, and an off-state polarity as selected by said patient user.

19. The method of claim 17, wherein said step A further includes the step of:

inputting a respective amplitude of the respective stimulation signal for each of said at least one electrode, said respective amplitude being selected by said patient user.

20. The method of claim 17, wherein said step A further includes the step of:

inputting a respective pulse width of the respective stimulation signal for each of said at least one electrode, said respective pulse width being selected by said patient user.

21. The method of claim 17, wherein said step A further includes the step of:

inputting a respective pulse rate of the respective stimulation signal for each of said at least one electrode, said respective pulse rate being selected by said patient user.

22. The method of claim 17, wherein said step B further includes the step of:

generating and applying said respective stimulation signal, having preset parameters as said set of selected parameters, on each of said at least one electrode when said patient user selects said preset parameters as said set of selected parameters.

23. The method of claim 22, wherein said preset parameters have historically resulted in high ratings of therapeutic effect for a large number of patients.

24. The method of claim 22, wherein said preset parameters have historically resulted in high ratings of therapeutic effect for said patient user.

25. The method of claim 17, wherein said step B further includes the step of:

generating and applying the respective stimulation signal having a predetermined set of parameters on each of said at least one electrode when said patient user resets said set of selected parameters.

26. The method of claim 17, further including the step of:

storing into memory said set of selected parameters, said corresponding rating of therapeutic effect, and said corresponding normal activity.

27. The method of claim 26, further including the step of;

determining an optimum set of selected parameters that produced a highest rating of therapeutic effect across a variety of normal activities for said patient user from all ratings of therapeutic effect stored in said memory.

28. The method of claim 26, further including the step of:

downloading said set of selected parameters, said corresponding rating of therapeutic effect, and said corresponding normal activity from said memory to a selected one of a computer and a printer.

29. The method of claim 17, further including the step of:

displaying on a screen said set of selected parameters, said corresponding rating of therapeutic effect, and said corresponding normal activity.

30. A method for screening, during normal activities of a patient user, therapeutic effect on said patient user from electrical stimulation by at least one electrode implanted near electrically excitable tissue of said patient user, said method including the steps of:

A. inputting a set of selected parameters that define a respective stimulation signal to be applied on each of said at least one electrode, said set of selected parameters being selected by said patient user, said step A further including the steps of;

inputting a respective amplitude of the respective stimulation signal for each of said at least one electrode, said respective amplitude being selected by said patient user;

inputting a respective pulse width of the respective stimulation signal for each of said at least one electrode, said respective pulse width being selected by said patient user; and

inputting a respective pulse rate of the respective stimulation signal for each of said at least one electrode, said respective pulse rate being selected by said patient user;

B. generating and applying said respective stimulation signal, having said set of selected parameters, on each of said at least one electrode, said step B further including the steps of;

configuring each of said plurality of electrodes to have a respective one of a positive polarity, a negative polarity, and an off-state polarity as selected by said patient user;

generating and applying said respective stimulation signal, having preset parameters as said set of selected parameters, on each of said at least one electrode when said patient user selects said preset parameters as said set of selected parameters; and

generating and applying the respective stimulation signal having a predetermined set of parameters on each of said at least one electrode when said patient user resets said set of selected parameters;

C. inputting a corresponding rating of therapeutic effect as entered by said patient user for said set of selected parameters, said therapeutic effect resulting from application of said respective stimulation signal, having said set of selected parameters, on each of said at least one electrode;

D. inputting a corresponding normal activity as entered by said patient user, said corresponding normal activity corresponding to said set of selected parameters and said corresponding rating of therapeutic effect;

E. storing into memory said set of selected parameters, said corresponding rating of therapeutic effect, and said corresponding normal activity;

F. determining an optimum set of selected parameters that produced a highest rating of therapeutic effect across a variety of normal activities for said patient user from all ratings of therapeutic effect stored in said memory;

G. downloading said set of selected parameters, said corresponding rating of therapeutic effect, and said corresponding normal activity from said memory to a selected one of a computer and a printer; and

H. displaying on a screen said set of selected parameters, said corresponding rating of therapeutic effect, and said corresponding normal activity.