Lead connector for tape electrode

• US 4,141,366 A
• Filed: 11/18/1977
• Issued: 02/27/1979
• Est. Priority Date: 11/18/1977
• Status: Expired due to Term

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Cross, Thomas E. Jr., Gray, Douglas R.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US05/852,849
• Time in Patent Office: 466 Days
• Field of Search: 128/2.06 E, 128/2.1 E, 128/404, 128/410, 128/411, 128/416-418, 128/DIG. 4
• US Class Current: 600/391
• CPC Class Codes: A61N 1/048 Electrodes characterised by a specific connection between lead and electrode
• CPC Class Codes: A61N 1/0492 Patch electrodes A61N1/0412, A61N1/0428 take precedence

Abstract

Electrical lead wire connection to a tape electrode is disclosed. Such electrodes are used for transmitting electrical signals through skin. The tape electrode includes a porous substrate material carrying a conductive layer comprised of finely divided silver metal suspended in a "dry" adhesive. An electrical lead wire is connected to the conductive layer of the tape electrode by a flat cover member having the same conductive layer on both sides thereof as is carried by the substrate of the tape electrode. One of the conductive layers of the cover member secures the lead wire to the conductive layer of the tape electrode. The other conductive layer of the cover member intimately contacts the skin along with the conductive layer of the tape electrode to provide for good electrical contact therewith when the tape electrode is applied thereto. The adhesive is normally "dry" and is activated at the time of application by a suitable solvent.

Claims

1. A tape electrode for adhesion to the skin, comprising:

a porous substrate;

a layer of conductive material and an adhesive matrix carried on one side of said substrate;

lead means contacting said conductive layer for connecting said conductive layer to an electrical apparatus; and

cover means of a substantially flat shape and having two sides, at least one of which is coated with conductive material, said cover means being positioned on said conductive material layer of said substrate so that said lead means is between said cover means and said layer of conductive material on said substrate with the coated side of the cover means member disposed away from the lead means.

2. The invention according to claim 1 wherein the various named conductive materials are all capable of being fluidized to a tacky condition upon the application thereto of a solvent.

3. The invention according to claim 2 wherein said coating of conductive material on said cover means electrically contacts said conductive layer on said substrate.

4. The invention according to claim 1:

wherein said conductive materials are a mixture of skin compatible metal particles blended into a water insoluble, low tack adhesive matrix in an amount sufficient to provide electrical continuity between the metal particles.

5. The invention according to claim 4 wherein the said conductive materials are at least partially soluble in nonaqueous solvent.

6. The invention according to claim 4 wherein said adhesive matrix of said conductive materials are non-toxic, non-irritating and non-allergenic polymers which are at least partially soluble in non-acqueous solvent.

7. The invention according to claim 1 including a coating of conductive material on both side of said cover means.

8. A tape electrode for prolonged adhesion to the skin and re-adherable thereto through the use of a solvent, comprising:

a porous tape substrate;

a conductive coating on one surface of the tape substrate having a mixture of skin compatible metal particles blended into a water insoluble, low tack adhesive matrix in an amount sufficient to provide electrical continuity between the metal particles;

a lead wire; and

means electrically joining said lead wire to the conductive coating on the tape substrate, said means including a substantially flat cover member having two sides, one of which is coated with a conductive material and the other of which is at least partially coated with a conductive material, said other side of said cover member being positioned with said at least partial coating of conductive material in conductive contact with the lead wire and holding it against the conductive coating on the tape substrate.

9. The tape electrode of claim 8 wherein said adhesive matrix of said conductive coating is a non-toxic, non-irritating and non-allergenic polymer which is at least partially soluble in liquid solvent.

10. The invention according to claim 9 wherein the solvent referred to is of the nonaqueous type.

11. A tape electrode for prolonged adhesion to the skin and re-adherable thereto through the use of a liquid non-aqueous solvent, comprising:

a porous tape substrate;

a conductive coating on one surface of the tape substrate having a mixture of skin compatible metal particles blended into a water soluble, low tack adhesive matrix in an amount sufficient to provide electrical continuity between the metal particles, the adhesive matrix being a non-toxic, non-irritating and non-allergenic polymer which is at least partially soluble in liquid non-aqueous solvent;

a lead wire, and

means electrically joining said lead wire to the conductive coating on the tape substrate, said means including a substantially flat cover member comprised of two pieces of porous tape substrate having a conductive coating on one side of each thereof and a double adhesive coated tape positioned between the other sides of said two substrates, the conductive coating on one side of one of said two substrates covering the entire side thereof, the other of said two sides being at least partially covered with the conductive coating, said other side of said two sides being positioned with said at least partial conductive coating in conductive contact with the lead wire and holding it against the conductive coating on the porous tape substrate.

12. The tape electrode of claim 11 in which the cover member is formed as a disc in which one of said pieces of tape substrate forming the cover member is of a lesser diametrical dimension than the other and in which the piece of lesser diametrical dimension contacts the lead wire and said conductive coating on the one surface of the tape substrate and secures the cover member and the lead wire to said conductive coating on the one surface of the tape substrate.

13. The tape electrode of claim 12 in which the lead wire extends through an aperture in the tape substrate and the conductive coating on the surface thereof, extending from the other surface of the same to be secured by the cover member to the conductive coating.

14. The tape electrode of claim 11 in which the lead wire extends along the conductive coating on the surface of the tape substrate and between it and the cover member with bare wires thereof secured by the cover member to the conductive coating on the surface of the tape substrate.

15. A tape electrode for prolonged adhesion to the epidermal skin of a human and readherable with application of a nonaqueous solvent to the free side thereof, the tape electrode comprising:

a strip of porous tape substrate having a conductive coating on one surface of the tape surface, which coating includes a mixture of skin compatible metal particles blended into a water insoluble, low tack adhesive matrix, the amount of metal particles in said matrix being sufficient to provide electrical continuity between the particles and the adhesive matrix being non-toxic, non-irritating and non-allergenic polymer at least partially soluble in a volatile organic solvent;

a lead wire having a portion thereof adapted for contacting the conductive coating on the tape substrate; and

a cover member contacting the conductive coating on the tape substrate with the lead wire portion therebetween and securing said portion of the lead wire to the conductive coating of the tape substrate under the cover member, said cover member being formed of two substrate-to-substrate pieces of the same material as the tape substrate, the two substrate-to-substrate pieces comprising;

an inner piece in contact with the conductive coating of the tape substrate and holding the portion of the lead wire between itself and the conductive coating of the tape structure and an outer piece including a conductive coating of adhesive material on the outermost surface thereof, the inner piece having at least an adhesive material on the surface contacting the lead wire and conductive coating of the tape substrate.

16. A tape electrode for adhesion to the skin comprising:

a tape substrate;

a conductive coating on one surface of the tape substrate having a mixture of skin compatible metal particles blended into a low tack adhesive matrix in an amount sufficient to provide electrical continuity between the metal particles;

a lead wire; and

means electrically joining said lead wire to the conductive coating on the tape substrate, said means including a substantially flat cover member having two sides, one of which is covered with a coating of conductive material and the other of which is at least partially coated with a conductive material, said other side of said cover member being positioned with said at least partial coating of conductive material in conductive contact with the lead wire and holding it against the conductive coating on the tape substrate.

17. The tape electrode of claim 16 wherein said cover member comprises two pieces of tape substrate with the conductive materials carried on one side of each thereof and a double coated adhesive tape positioned between the other sides of said substrates.