Apparatus for electro-stimulation of flexing body portions

• US 5,540,735 A
• Filed: 12/12/1994
• Issued: 07/30/1996
• Est. Priority Date: 12/12/1994
• Status: Expired due to Term

• Current Assignee: Encore Medical Asset Corporation (Enovis Corp.)
• Original Assignee: Rehabilicare, Inc. (Compeq Technology Company Limited)
• Inventors: Wingrove, Robert C.
• Primary Examiner(s): Sykes, Angela D.
• Assistant Examiner(s): HUANG, STEPHEN D
• Application Number:
  US08/353,674
• Time in Patent Office: 596 Days
• Field of Search: 607/2, 607/46, 607/48, 607/59, 607/61, 607/62, 607/66, 607/67-74, 607/149, 607/55, 607/144, 607/152, 607/153, 128/739, 128/741, 128/742, 128/744, 128/879, 128/898, 602/21, 602/64
• US Class Current: 607/46
• CPC Class Codes: A61F 5/0118 for the arms, hands or fingers
• CPC Class Codes: A61N 1/0456 Specially adapted for transcutaneous electrical nerve stimulation [TENS]
• CPC Class Codes: A61N 1/36021 for treatment of pain

Abstract

A stimulation apparatus is used for treatment of flexing portions of the human body by electrical stimulation. The apparatus has positioning means for firmly holding the flexing portion of the human body. There are two or more stimulation output contacts mounted in the positioning means in predetermined locations relative to each other and the area to be treated with stimulation. A stimulator is electrically connected to the output contacts for introducing electrical stimulation at the output contacts.

Claims

1. An apparatus for introducing electrical stimulation into a flexing portion of a human body, comprising:

positioning means for firmly holding said flexing portion in a predetermined position so that said flexing portion is held in substantial immobility;

two or more stimulation contacts mounted in the positioning means in predetermined locations relative to each other and an area to be treated with stimulation so that the electrical stimulation bridges said flexing portion; and

stimulator means electrically connected to the stimulation contacts for introducing electrical stimulation at the stimulation contacts.

2. The apparatus as recited in claim 1 wherein the positioning means is a brace that firmly holds a wrist and hand with a palm and a back in a position of substantial immobility.

3. The apparatus as recited in claim 2 wherein the two or more stimulation contacts comprise four stimulation contacts as follows:

a first contact for positioning at an anterior, inner portion of the wrist;

a second contact for positioning at an anterior, outer portion of the wrist;

a third contact for positioning at the palm of the hand adjacent the wrist; and

a fourth contact for positioning at the back of the hand adjacent the wrist.

4. The apparatus as recited in claim 3 wherein the stimulator means is an interferential stimulator.

5. The apparatus as recited in claim 4 wherein the stimulator is connected to the stimulation contacts so that the first and fourth contacts are part of a circuit delivering one channel of stimulus of a first specified frequency and the second and third contacts are part of a circuit delivering a second channel of stimulus of a second specified frequency with an interference relationship to the first frequency.

6. The apparatus as recited in claim 1 further comprising a skin electrode associated with and placed in electrically conductive relationship with each of said stimulation contacts.

7. The apparatus as recited in claim 1 wherein said stimulator means comprises

a signal generator;

a power source including a switch; and

an output connector.

8. The apparatus as recited in claim 7 wherein said signal generator comprises

waveform production means for producing various waveforms.

9. The apparatus as recited in claim 8 wherein one of said various waveforms is a pulse waveform.

10. The apparatus as recited in claim 8 wherein one of said various waveforms is a square waveform.

11. The apparatus as recited in claim 8 wherein one of said various waveforms is a sawtooth waveform.

12. The apparatus as recited in claim 1 wherein said stimulator means further comprises an amplitude control means for controlling amplitude of the electrical stimulation.

13. The apparatus as recited in claim 8 wherein said stimulator means further comprises a frequency control means for controlling the rate at which the waveforms are delivered by said stimulator.

14. The apparatus as recited in claim 1 wherein said stimulator means further comprises means for generating a carrier frequency and an adjustable interference frequency;

and

a frequency shifting control means for controlling in a predetermined manner changes in the adjustable interference frequency.

15. The apparatus as recited in claim 1 wherein the positioning means comprises

a brace that contains stiffeners that are adapted to extend across the flexing portion of the body to substantially limit flexing during stimulation.

16. An apparatus for introducing electrical stimulation into a hand with a palm and a back, and a wrist portion of a human body, comprising:

a wrist brace for firmly holding said hand and wrist portion in a predetermined position so that said hand and wrist portion are held in substantial immobility;

two or more stimulation contacts mounted in the wrist brace in predetermined locations relative to each other and the hand and wrist portion to be treated with stimulation so that the electrical stimulation bridges the hand and the wrist portion;

two or more skin electrodes adapted to be with each skin electrode attached to one of said two or more stimulation contacts and each skin electrode adapted to be attached to said surface of hand and wrist portion; and

a stimulator electrically connected to the stimulation contacts for introducing electrical stimulation to the hand and wrist portion through the stimulation contacts and the skin electrodes.

17. An apparatus for introducing electrical stimulation into a hand, having a palm and a back, and a wrist portion of a human body, comprising:

a brace for firmly holding said wrist and hand in a position of substantial immobility;

four stimulation contacts mounted in said brace such that;

a first contact is positioned at an anterior, inner portion of the wrist;

a second contact is positioned at an anterior, outer portion of the wrist;

a third contact is positioned at the palm of the hand adjacent the wrist;

a fourth contact is positioned at the back portion of the hand adjacent the wrist; and

stimulator means electrically connected to the stimulation contacts for introducing electrical stimulation at the stimulation contacts.

18. The apparatus is recited in claim 17, wherein the stimulator means is an interferential stimulator.

19. The apparatus as recited in claim 18, wherein the stimulator is connected to the stimulation contacts so that the first and fourth contacts are part of a circuit delivering one channel of stimulus of a first specified frequency and the second and third contacts are part of a circuit delivering a second channel of stimulus of a second specified frequency with an interference relationship to the first frequency.