Biomedical electrode

• US 3,882,853 A
• Filed: 06/13/1974
• Issued: 05/13/1975
• Est. Priority Date: 02/15/1973
• Status: Expired due to Term

• Current Assignee: John W. Gofman, Richard F. Gianni
• Original Assignee: John W. Gofman, Richard F. Gianni
• Inventors: Gofman, John W., Gianni, Richard F.
• Primary Examiner(s): Gaudet, Richard A.
• Assistant Examiner(s): Cohen, Lee S.
• Application Number:
  US05/479,112
• Time in Patent Office: 334 Days
• Field of Search: 128/2.6E,2.1E,DIG.4,416-418,410-411,404-405,172.1 339/217S,252P
• US Class Current: 600/391
• CPC Class Codes: A61B 5/25 Bioelectric electrodes therefor
• CPC Class Codes: A61B 5/274 using snap or button fasteners

Abstract

A biomedical electrode or sensor is provided having a cup-like soft plastic base member with a solid conductive snap member therein and with a compressible sponge-like material holding a conductive paste between the solid conductive member and the body of the wearer. The device of the present invention is suitable for use as a sensor wherein it is desired to measure an electrical potential developed by the body as well as useful wherein potentials are applied to the body as in a cardiac pacemaker. The electrode was particularly designed for use with a cardiac monitor device.

Claims

1. A BODY ELECTRODE COMPRISING IN COMBINATION:

A. A BASE MEMBER MADE OF A SINGLE PIECE OF A FLEXIBLE, SOFT PLASTIC HAVING A THIN FLEXIBLE RIM PORTION OF RIGID CENTER FLAT BOTTOMED CUP-LIKE MEMBER DEFINED BY HEAVY SIDEWALLS AND A HEAVY TOP, B. A SNAP COMPRISING A RELATIVELY THIN FLAT DISC OF CONDUTIVE MATERIAL LYING ON THE FLAT BOTTOM OF THE DUP-LIKE MMEMBER, AND HAVING A TERMINAL EXTENDING THROUGH THE FACE OF THE CUP-LIKE MMEMBER, C. A THIN SHEET POROUS NON-CONDUCTIVE MATERIAL OF SUBSTANTIALLY THE SAME SIZE AS THE FLAT BOTTOM OF THE CUP-LIKE MEMBER, AND HAVING ONE SURFACE IN CONTACT WITH SAID DISC, D. A THICK DISC OF POROUS FOAM-LIKE MATERIAL IN CONTACT WITH SAID POROUS NONCONDUCTIVE MATERIAL AND FILLING THE REMAINDER OF THE CAVITY OF THE CUP-LIKE MEMBER AND EXTENDING A SUBSTANTIAL DISTANCE BEYOND THE OPEN END OF THE CUP-LIKE MEMBER, SAID FOAM-LIKE MATERIAL BEING SATURATED WITH AN ELECTRICALLY CONDUCTIVE MATERIAL, AND E. MEANS FOR ATTACHING SAID CUP TO A HYMAN BODY BY THE OUTER THIN WIDE RIM WHEREBY SAID FOAMM-LIKE MATERIAL IS BROUGH INTO COMPRESSION WITHIN THE CUP-LIKE MEMBER BY PRESSURE FROM THE BODY.

2. The structure of claim 1 wherein the outer surface of said cup-like member is formed at an angle to provide a ramp to resist lateral forces.

3. The structure of claim 1 wherein said rim is provided with a double sided adhesive on its outer surface surrounding the opening of the cup for attachment of the electrode to the body.

4. The structure of claim 1 wherein the inner surface of said cup is provided with a plurality of bosses, said snap being retained between the bosses and the flat bottom of the cup-like member.

5. The structure of claim 1 wherein the snap terminal is a center post extending through the base, said center post terminating in a bifurcated bulbous member.

6. The structure of claim 1 wherein said snap has a sharp edge at the perimeter of said disc for retaining itself within the base and acting as a seal.

7. The structure of claim 1 wherein the thin sheet of porous nonconductive material is a sheet of paper.

8. The structure of claim 7 wherein the porous paper consists of a sheet of blotting paper and the foam-like material consists of a disc of polyurethane foam.