T.E.N.S. Electrode

• US 4,458,696 A
• Filed: 11/03/1980
• Issued: 07/10/1984
• Est. Priority Date: 08/07/1979
• Status: Expired due to Term

• Current Assignee: 3M Company
• Original Assignee: 3M Company
• Inventors: Larimore, Franklin C.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US06/203,681
• Time in Patent Office: 1,345 Days
• Field of Search: 128/639-641, 128/644, 128/303.13, 128/783, 128/798, 128/802, 128/803
• US Class Current: 607/152
• CPC Class Codes: A61B 5/259 using conductive adhesive means, e.g. gels
• CPC Class Codes: A61N 1/0456 Specially adapted for transcutaneous electrical nerve stimulation [TENS]
• 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

A T.E.N.S. electrode is disclosed comprising an essentially dry, body-conformable, electrically-conductive interfacing layer having a maximum thickness of 10 mils, a low profile, one-piece electrically-conductive connector adherent to the top surface of the interfacing layer and a backing member, overlying the interfacing layer and the connector. The electrode is extensible in at least one direction up to 50 percent and requires less than about 25×10⁶ dynes/cm² for an elongation of 20 percent as tested per ASTM Standard D-882.

Claims

1. A T.E.N.S. electrode comprising:

an essentially dry, body-conformable, electrically-conductive interfacing layer having an adherent top surface and a lower body-contacting surface adherent to the skin, said interfacing layer being extensible up to 50 percent in a manner similar to human skin;

a backing member attached to said top surface of said interfacing layer, said backing member having a hole therethrough providing access to said interfacing layer for electrical contact, said backing member exhibiting sufficient extensibility to be compliant with said interfacing layer after the electrode is placed on the wearer; and

a body-conformable, one-piece electrically-conductive connector having a substantially flat electrical impulse distribution portion releasably adhered in electrical contact with said top surface of said interfacing layer through said hole of said backing member in electrical contact with said interfacing layer and an upper surface having therein a means for releasable connection to a connector lead of an electrical stimulator.

3. The electrode in accordance with claims 1 or 2 wherein said connector consists of a carbon-impregnated polymeric material selected from the group consisting of silicone rubber, plasticized polyvinyl chloride, epichlorohydrin rubber, polytetrafluoroethylene, or a polymer of ethylene-propylene diene.

4. The electrode in accordance with claims 1 or 2 wherein said interfacing layer comprises a carrier portion having an electrically conductive adhesive at said top surface and said lower body-contacting surface.

5. The electrode in accordance with claim 4 wherein said carrier portion is a non-woven web.

6. The electrode in accordance with claim 4 wherein said adhesive is butyl acrylate-acrylic acid copolymer neutralized with methyl diethanolamine.

7. The electrode in accordance with claim 6, wherein the mole ratio of butyl acrylate to acrylic acid is 75:

25 and said copolymer is neutralized to 95 mole percent with diethanolamine.

2. A T.E.N.S. electrode comprising:

an essentially dry, body-conformable, electrically-conductive interfacing layer having an adherent top surface and a lower body-contacting surface adherent to the skin, said interfacing layer being extensible up to 50 percent in a manner similar to human skin;

a body-conformable, one-piece electrically-conductive connector having a substantially flat electrical impulse distribution portion adhered in electrical contact with said top surface of said interfacing layer and an upper surface having therein means for releasable connection to a connector lead of an electrical stimulator; and

a backing member adhered to said connector and at least a portion of said top surface of said interfacing layer whereby said connector is retained in electrical contact with said interfacing layer, said backing member exhibiting sufficient extensibility to be compliant with said interfacing layer after the electrode is placed on the wearer.

8. The electrode according to claim 2 wherein said backing member is a vinyl foam.