Muscle stimulator

• US 4,411,268 A
• Filed: 02/10/1982
• Issued: 10/25/1983
• Est. Priority Date: 02/10/1982
• Status: Expired due to Term

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Cox, James A.
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US06/347,514
• Time in Patent Office: 622 Days
• Field of Search: 128/419 PG, 128/421, 128/422, 128/423 R, 128/423 V
• US Class Current: 607/9
• CPC Class Codes: A61N 1/36034 specified by the stimulation parameters
• CPC Class Codes: A61N 1/365 controlled by a physiological parameter, e.g. heart potential evoked response A61N1/371

Abstract

A system for inducing a desired functional contraction in muscle tissue while conditioning the contractile properties of that tissue for the desired functional contraction. Pacing stimulation signals are generated having parameters established by a desired functional contraction of particular muscle tissue, the signals being applied to the body to initiate the contraction. A conditioning stimulation signal is also generated having parameters established by the desired functional contraction and applied to the body to condition the contractile properties of the particular muscle tissue. The conditioning stimulation signal may transform the contractile properties of the tissue or maintain those properties, which may also include the responsiveness of the tissue to pacing stimulation signals. In a preferred embodiment, the conditioning stimulation signal is a signal having a frequency from about 1.5 hertz to about 20 hertz and most preferably about 10 hertz. In another preferred embodiment, the conditioning stimulation signal has a frequency from about 80 hertz to 2,000 hertz and most preferably about 100 hertz. In all preferred embodiments, the signal may be continuous or discontinuous.

Claims

1. A system for inducing a desired functional contraction in muscle tissue while conditioning the contracile properties of said tissue for said functional contraction which comprises:

means for generating pacing stimulation signals having parameters established by a desired functional contraction of particular muscle tissue including means applying said pacing stimulation signals to the body for initiating said desired functional contraction of said particular muscle tissue; and

means for generating a conditioning stimulation signal having parameters established by said desired functional contraction including means applying said conditioning stimulation signals to the body for conditioning the contractile properties of said particular muscle tissue.

2. The system of claim 1 wherein said means for conditioning comprises means for transforming the contractile properties of said particular muscle tissue.

3. The system of claim 1 wherein said means for conditioning comprises means for maintaining the contractile properties of said particular muscle tissue.

4. The system of claim 1 wherein said conditioning stimulation signal comprises a signal having a frequency from about 1.5 Hz to about 20 Hz.

5. The system of claim 4 wherein said conditioning stimulation signal comprises a continuous signal.

6. The system of claim 5 wherein said means for conditioning comprises means for transforming the contractile properties of said particular muscle tissue.

7. The system of claim 5 wherein said means for conditioning comprises means for maintaining the contractile properties of said particular muscle tissue.

8. The system of claim 4 wherein said conditioning stimulation signal comprises a discontinuous signal.

9. The system of claim 8 wherein said means for conditioning comprises means for transforming the contractile properties of said particular muscle tissue.

10. The system of claim 8 wherein said means for conditioning comprises means for maintaining the contractile properties of said particular muscle tissue.

11. The system of claim 1 wherein said conditioning stimulation signal comprises a signal having a frequency of about 10 Hz.

12. The system of claim 11 wherein said conditioning stimulation signal comprises a continuous signal.

13. The system of claim 12 wherein said means for conditioning comprises means for transforming the contractile properties of said particular muscle tissue.

14. The system of claim 12 wherein said means for conditioning comprises means for maintaining the contractile properties of said particular muscle tissue.

15. The system of claim 11 wherein said conditioning stimulation signal comprises a discontinuous signal.

16. The system of claim 15 wherein said means for conditioning comprises means for transforming the contractile properties of said particular muscle tissue.

17. The system of claim 15 wherein said means for conditioning comprises means for maintaining the contractile properties of said particular muscle tissue.

18. The system of claim 1 wherein said conditioning stimulation signal comprises a signal having a frequency from about 80 Hz to about 2000 Hz.

19. The system of claim 18 wherein said conditioning stimulation signal comprises a continuous signal.

20. The system of claim 19 wherein said means for conditioning comprises means for transforming the contractile properties of said particular muscle tissue.

21. The system of claim 19 wherein said means for conditioning comprises means for maintaining the contractile properties of said particular muscle tissue.

22. The system of claim 18 wherein said conditioning stimulation signal comprises a discontinuous signal.

23. The system of claim 22 wherein said means for conditioning comprises means for transforming the contractile properties of said particular muscle tissue.

24. The system of claim 22 wherein said means for conditioning comprises means for maintaining the contractile properties of said particular muscle tissue.

25. The system of claim 1 wherein said conditioning stimulation signal comprises a signal having a frequency of about 100 Hz.

26. The system of claim 25 wherein said conditioning stimulation signal comprises a continuous signal.

27. The system of claim 26 wherein said means for conditioning comprises means for transforming the contractile properties of said particular muscle tissue.

28. The system of claim 27 wherein said means for conditioning comprises means for maintaining the contractile properties of said particular muscle tissue.

29. The system of claim 25 wherein said conditioning stimulation signal comprises a discontinuous signal.

30. The system of claim 29 wherein said means for conditioning comprises means for transforming the contractile properties of said particular muscle tissue.

31. The system of claim 29 wherein said means for conditioning comprises means for maintaining the contractile properties of said particular muscle tissue.

32. The system of claim 1 wherein said means for conditioning comprises means applying said conditioning stimulation signal directly at the site of said particular muscle tissue.

33. The system of claim 1 wherein said particular muscle tissue comprises innervated muscle tissue, said means for conditioning comprising means applying said conditioning stimulation signal to a nerve of said particular muscle tissue.

34. The system of claim 1 wherein said means for conditioning conditions the responsiveness of said particular muscle tissue to said pacing stimulation signals.

35. The system of claim 1 further comprising means for inducing a functional contraction in muscle tissue functionally associated with said particular muscle tissue, said pacing stimulation signals generating means comprising means responsive to said functional contraction inducing means for generating said pacing stimulation signals in predetermined time relationship with the functional contraction of said functionally associated muscle tissue.

36. The system of claim 1 further comprising means for sensing a functional contraction in muscle tissue functionally associated with said particular muscle tissue, said pacing stimulation signals generating means comprising means responsive to said functional contraction sensing means for generating said pacing stimulation signals in predetermined time relationship with the functional contraction of said functionally associated muscle tissue.