Electrode pad

• US 4,515,162 A
• Filed: 09/14/1981
• Issued: 05/07/1985
• Est. Priority Date: 03/14/1980
• Status: Expired due to Fees

• Current Assignee: Nitto Electric Industrial Co., Ltd. (Nitto Denko Corporation)
• Original Assignee: Nitto Electric Industrial Co., Ltd. (Nitto Denko Corporation)
• Inventors: Yamamoto, Katsuhiro, Okada, Yoshiyuki, Matsumoto, Katsuo
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US06/301,861
• Time in Patent Office: 1,331 Days
• Field of Search: 128/639-641, 128/643, 128/798, 128/802, 128/803, 128/303.13, 252/500
• US Class Current: 600/391
• CPC Class Codes: A61B 5/257 using adhesive means, e.g. adhesive pads or tapes
• CPC Class Codes: A61B 5/259 using conductive adhesive means, e.g. gels
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• CPC Class Codes: C09J 133/02 Homopolymers or copolymers of acids; Metal or ammonium salts thereof

Abstract

An electrode pad comprising a tacky crosslinked hydrogel adhered to an electrode terminal plate, through which electrical signals from the living body can be transmitted to an electric recording apparatus.

Claims

1. An electrode pad consisting essentially a tacky cross-linked electrically conductive hydrogel, wherein said hydrogel comprises at least one of polyacrylic acid and polyacrylic acid salt, water, and a cross-linking compound containing at least two epoxy groups in the molecule.

2. An electrode pad as in claim 1, wherein at least one layer of a woven fabric is provided to support the hydrogel, and the hydrogel is in contact with said at least one layer.

3. An electrode pad as recited in claim 2, wherein a frame of film is provided on a side of the electrode pad intended for contacting the living body.

4. The electrode pad as recited in claim 3, wherein the frame is positioned on the fabric layer so as to form a layered structure wherein the layers are in the order of hydrogel, fabric, and frame.

5. An electrode pad as in claim 2, wherein said hydrogel has a two-layered structure with one layer being a weakly tacky or non-tacky layer.

6. An electrode pad as in claim 1, wherein the thickness of said hydrogel is from about 0.5 to 10 m.