Apparatus and method for delivering electrical stimulus to tissue

• US 5,607,461 A
• Filed: 10/20/1995
• Issued: 03/04/1997
• Est. Priority Date: 10/20/1995
• Status: Expired due to Fees

• Current Assignee: Nexmed Holdings
• Original Assignee: Nexmed Holdings
• Inventors: Lathrop, Peter H.
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): EVANISKO, GEORGE ROBERT
• Application Number:
  US08/545,945
• Time in Patent Office: 501 Days
• Field of Search: 607/1, 607/3, 607/2, 607/45, 607/46, 607/48, 607/50, 607/52, 607/58, 607/75, 607/115, 607/118, 607/134, 607/135, 607/142, 607/145-149, 607/98, 607/99, 607/150, D24/187, D24/200, D24/144, D24/170, 128/639, 128/644
• US Class Current: 607/75
• CPC Class Codes: A61N 1/326 for promoting growth of cells, e.g. bone cells
• CPC Class Codes: A61N 1/36021 for treatment of pain
• CPC Class Codes: A61N 1/3756 Casings with electrodes thereon, e.g. leadless stimulators

Abstract

An electrical stimulation apparatus and method for applying an electrical stimulation to a lesion. The apparatus includes a housing having a battery and an electrical circuit mounted inside the housing. A pair of electrodes are removably mounted to the housing and extend therefrom so as to accommodate being touched to the skin on opposite sides of the lesion. A switch on the housing allows the user to selectively supply electrical energy to the electrodes. A first light on the housing is illuminated when the switch is depressed thereby providing a visual indication that electrical energy is being supplied to the electrodes. A second light on the housing provides a visual indication of a low battery condition. A closure is mountable to the housing and encloses the electrodes, switch, and light within the closure. The size and shape of the housing and closure are specifically designed to allow the user to carry the electrical stimulation apparatus at all times and to encourage its frequent use at any time and under almost any circumstance.

Claims

1. An apparatus for applying an electrical stimulus comprising:

a housing;

a pair of electrodes extending from said housing, said pair of electrodes including a first electrode and a second electrode, each of said first electrode and said second electrode having an elongated body having a first end and a second end, said first end being configured with a smooth profile for contacting tissue, said second end including detent means for releasably engaging said elongated body to said housing;

a battery means in said housing for supplying electrical current to said electrodes; and

switch means on said housing for controlling said electrical current to said electrodes;

wherein said housing includes a closure and an undercut section adjacent to said electrodes and to said switch means, said undercut section receiving said closure to enclose said electrodes and said switch means.

2. The apparatus defined in claim 1 wherein said housing includes clip means for releasably engaging said detent means of said elongated body in said housing, said clip means also providing electrical contact with said elongated body.

3. The apparatus defined in claim 1 wherein said housing includes a first indicator light, said first indicator light illuminating when said switch means is activated and said battery is providing a predetermined amount of electrical current to said electrodes.

4. The apparatus defined in claim 3 wherein said housing includes a second indicator light, said second indicator light illuminating when said switch means is activated and said battery is not providing adequate electrical current to said electrodes.

5. The apparatus defined in claim 1 wherein said undercut section includes a recess formed around said switch means.

6. The apparatus defined in claim 1 wherein said closure is removably mountable to said housing to provide a smooth external profile to said apparatus.

7. The apparatus defined in claim 1 wherein said housing includes a retainer for receiving a key chain to tether said housing.

8. An apparatus for the application of electrical stimulation to tissue comprising:

a housing, said housing having a smooth external profile between a first end and a second end and an undercut section adjacent said first end of said housing;

a switch recessed within said undercut section of said housing;

a pair of electrodes extending from said first end of said housing, said electrodes each being formed with a cylindrical profile having a first end and a second end with a rounded tip on said first end and a sharpened tip on said second end, said sharpened tip including a recessed detent adjacent said sharpened tip, said housing including a spring clip for releasably engaging said detent;

a closure for said housing, said closure being received in said undercut section thereby providing a continuation of said smooth external profile of said housing across said closure and enclosing said electrodes;

a battery in said housing; and

an electrical circuit in said housing electrically coupled between said battery and said electrodes, said switch means controlling electrical energy from said battery to said electrodes and through said electrical circuit.

9. The apparatus defined in claim 8 wherein said electrodes are releasably mounted to said housing.

10. The apparatus defined in claim 8 wherein said housing includes a retainer for attaching said housing.

11. The apparatus defined in claim 8 wherein said housing includes a light means elctrically connected across said electrodes for providing a visual indication that electrical energy is being delivered to said electrodes.

12. The apparatus defined in claim 11 wherein said light means includes a low-battery indicator electrically coupled to said electrical circuit for providing a visual indication that said battery is not delivering sufficient electrical energy.

13. A method for applying electrical stimulation comprising:

selecting a housing capable of being held in a hand;

mounting an electrical circuit in said housing, said electrical circuit being operable for supplying an electrical stimulation;

coupling said electrical circuit to a battery thereby enabling said battery to provide electrical energy to said electrical circuit;

attaching a pair of electrodes to said electrical circuit, said pair of electrodes extending from said housing and thereby providing for delivery of said electrical stimulation;

controlling said electrical circuit with a switch;

contacting a surface to undergo electrical stimulation with said pair of electrodes; and

applying electrical stimulation to the surface by operating said swinish thereby activating said electrical circuit and applying said electrical stimulation with said pair of electrodes;

wherein said selecting step includes shielding said electrodes against contamination by enclosing said pair of electrodes and said switch with a closure removably mounted to said housing.

14. The method defined in claim 13 wherein said applying step includes visually observing when electrical stimulation is being applied by connecting a light means to said electrical circuit said light means indicating that said switch has been activated and that electrical energy is being supplied to said pair of electrodes.

15. The method defined in claim 13 wherein said applying step includes assuring sufficient battery power for said electrical circuit by coupling a second light means to said electrical circuit for indicating a low battery condition of said battery.