Apparatus and method for the stimulation of a human muscle

• US 4,524,774 A
• Filed: 07/19/1982
• Issued: 06/25/1985
• Est. Priority Date: 07/30/1981
• Status: Expired due to Fees

• Current Assignee: Hildebrandt
• Original Assignee: Deutsche Nemectron GmbH
• Inventors: Hildebrandt, Jurgen
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US06/399,283
• Time in Patent Office: 1,072 Days
• Field of Search: 128/419 E, 128/419 R, 128/421, 128/422, 128/423 W, 128/903
• US Class Current: 607/62
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/4519 Muscles A61B5/389, A61B5/224 take precedence
• CPC Class Codes: A61N 1/36003 of motor muscles, e.g. for walking assistance
• CPC Class Codes: A61N 1/37205 Microstimulators, e.g. implantable through a cannula
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

Apparatus and process for stimulating muscle such as where a portion of a muscle and its nerve structure are damaged. Muscle stimulators are embedded within the muscle at the general location where the muscle is to be activated. Muscle stimulation signals are transmitted to the muscle stimulators by a transmitter-receiver which receives muscle potential signals from muscle potential sensors embedded within the muscle, and converts these signals into muscle stimulation signals. The transmitter-receiver may be mounted on a cuff which can be externally secured. The cuff, the stimulators, and sensors are provided with antennas such that the transmitter-receiver transmits and receives signals without being wired to the sensors and stimulators. The sensors and stimulators have power supplies which may be energized from external high frequency sources which may themselves be mounted on the cuff. Power transmission occurs through antennas such that the sources need not be wired to the various components.

Claims

1. Apparatus for stimulating a muscle, comprising:

(a) first means for stimulating said muscle, said first means being adapted to receive muscle stimulation signals from third means and to stimulate one region of said muscle accordingly;

(b) second means for receiving muscle stimulation signals directly from another region of said muscle and transmitting said muscle stimulation signals to said third means; and

(c) third means adapted to receive said muscle stimulation signals and to re-transmit said muscle stimulation signals to said means for stimulating said muscle.

2. The apparatus as defined by claim 1 wherein said first means comprises a receiver for receiving said muscle stimulation signals from said third means, and a plurality of electrodes for directly stimulating said muscle.

3. The apparatus as defined by claim 2 wherein said first means further comprises a power supply.

4. The apparatus as defined by claim 3 further comprising an external high frequency energization source to power said power supply of said first means.

5. The apparatus as defined by claim 4 wherein said first means further comprises a plurality of electrodes adapted to be embedded within said muscle to stimulte said muscle.

6. The apparatus as defined by claim 5 wherein said first means further comprises an antenna adapted to receive said muscle stimulation signals from said third means, and an antenna to receive said high frequency energy from said external high frequency energization source.

7. The apparatus as defined by claim 1 wherein said second means comprises at least one electrode adapted to sense said muscle stimulation signals.

8. The apparatus as defined by claim 7 wherein said second means further comprises an antenna connected to transmit said muscle stimulation signals to said third means, and a power supply.

9. The apparatus as defined by claim 8 further comprising an external high frequency energization source to power said power supply of said second means.

10. The apparatus as defined by claim 1 wherein said second means is adapted to transmit said muscle stimulation signals while modulating said signals as a function of sensed muscle potential.

11. The apparatus as defined by claim 10 wherein said first means is further adapted to control the amplitude, frequency and length of the stimulation signal applied to said muscle as a function of the signal received from said third means.

12. The apparatus as defined by claim 11 wherein said third means is configured to receive said stimulation signals from said second means, to translate said stimulation signals, and to re-transmit said translated stimulation signals to said first means.

13. The apparatus as defined by claim 1 wherein the frequencies of said second means transmitter and said third means receiver are different from said receiver of said first means and the transmitter of said third means.

14. The apparatus as defined by claim 1 wherein said third means is mounted on a cuff adapted to be secured externally around the muscle to be stimulated.

15. The apparatus as defined by claim 14 wherein said third means further comprises at least one antenna thereon to transmit and receive a signal to and from said first and second means, respectively.

16. The apparatus as defined by claim 15 wherein said cuff comprises means for securing said cuff around said muscle.

17. The apparatus as defined by claim 1 wherein said third means is not wired to either of said first or second means.

18. Apparatus for stimulating a muscle, comprising:

(a) first means implantable within a first region of said muscle for stimulating said muscle, said first means being adapted to receive a muscle stimulation signal from an external third means and to stimulate one region of said muscle accordingly;

(b) second means implantable within a second region of said muscle to sense muscle stimulation signals directly from said second region of said muscle and transmit said muscle stimulation signals to an external third means; and

(c) third means positioned externally and being adapted to receive said muscle stimulation signals and to retransmit said muscle stimulation signals to said first means for stimulating said muscle.

19. A cuff for use with an apparatus for stimulating a muscle, comprising:

(a) a receiver tuned to receive, demodulate and decode a signal transmitted by an implantable muscle potential sensor, and an antenna for receiving the transmitted signal from the implantable sensor;

(b) data processing means for amplifying and addressing the signals received by said receiver from said implantable muscle sensors;

(c) a transmitter for transmitting the signals of (b) to a muscle stimulator implantable in a muscle to stimulate said muscle; and

(d) means for securing said cuff to a body.

20. The apparatus as defined by claim 19 further comprising control voltage input means whereby the amplitude, duration or form of said signals of step (b) may be modified at will.

21. A process for stimulating a muscle region comprising the steps of:

(a) measuring directly muscle potential at a first muscle region by means of a plurality of muscle potential sensors implanted in a first region of muscle;

(b) transmitting said measured muscle potential to a transmitter-receiver which receives said muscle potential signals and re-transmits these signals as muscle stimulation signals; and

(c) receiving said transmitted measured muscle stimulation signals of step (b) and transmitting the muscle stimulation signals to a plurality of implanted stimulus producers implanted at a second region in the muscle to stimulate the second region of said muscle.

22. The process as defined by claim 21 wherein said second region is connected to said first region by a nerve which has been at least partially damaged.

23. The process as defined by claim 22 comprising energizing said apparatus by high frequency energy generated by an external source.

24. The process as defined by claim 23 comprising performing step (c) external to the body in which the muscle is located.

25. The process as defined by claim 24 further comprising transmitting the stimulation signal of step (c) to a plurality of implanted stimulus producers from a location external to the body in which said muscle is located.

26. The process as defined by claim 21 comprising receiving and transmitting in steps (c) and (d) by using antennas.

27. A process of stimulating damaged muscle tissue where a portion of the muscle nerve structure has been inactivated comprising the steps of:

(a) measuring directly muscle potential at an undamaged muscle region by means of a plurality of potential sensors implanted in a muscle;

(b) transmitting said measured muscle potential to an external transmitter-receiver, receiving said measured muscle potential in said transmitter-receiver and re-transmitting said muscle potential signals as muscle stimulation signals; and

(c) receiving said transmitted muscle stimulation signals of step (b) and transmitting the muscle stimulation signals to a plurality of implanted stimulus producers embedded at an effected region in the muscle suffering from said nerve damage to stimulate the effected region of said muscle.

28. Apparatus for stimulating a muscle, comprising:

(a) first means for stimulating said muscle, said first means being adapted to receive muscle stimulation signals from third means and to stimulate one region of said muscle accordingly;

(b) second means for receiving muscle stimulation signals directly from a region of said muscle and transmitting said muscle stimulation signals to said third means; and

(c) third means adapted to receive said muscle stimulation signals and to re-transmit said muscle stimulation signals to said means for stimulating said muscle.