X-Ray transparent medical electrode

• US 4,370,984 A
• Filed: 03/23/1981
• Issued: 02/01/1983
• Est. Priority Date: 04/30/1979
• Status: Expired due to Term

• Current Assignee: Conmed Corporation (Jefferies Financial Group, Inc.)
• Original Assignee: NDM, Inc.
• Inventors: Cartmell, James V.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US06/246,874
• Time in Patent Office: 680 Days
• Field of Search: 128/639-641, 128/643, 128/644, 128/787, 128/798, 128/802, 128/803
• US Class Current: 600/385
• CPC Class Codes: A61B 2562/0215 Silver or silver chloride containing
• CPC Class Codes: A61B 2562/0217 Electrolyte containing
• CPC Class Codes: A61B 2562/125 characterised by the manufacture of electrodes
• CPC Class Codes: A61B 5/25 Bioelectric electrodes therefor
• CPC Class Codes: A61B 5/259 using conductive adhesive means, e.g. gels
• CPC Class Codes: A61B 5/274 using snap or button fasteners
• CPC Class Codes: A61B 5/324 Means for providing electrolytes, e.g. syringes

Abstract

The signal conducting element of a medical electrode of the type bridged to skin by electrolyte and which is required to be X-ray transparent comprises a thin layer of a conductive paint adhered to a relatively thin supporting substrate, said substrate with adhered paint extending remotely from the electrolyte-to-skin interface for circuit connection and protected by a barrier which excludes electrolyte from the remote circuit connection.

Claims

1. A medical electrode comprising:

3. The electrode of claim 1 wherein said conductor has a thickness in the range of 1-26 mils, said film having a thickness in the range of 1/2-20 mils and said silver paint having a thickness in the range of 1/2-6 mils.

4. The electrode of claim 1 wherein said means securing said conductor to said sponge comprises a cover sheet having an adhesive layer engaging said conductor and said sponge.

5. The electrode of claim 1 wherein said insulating covering comprises a layer of essentially moisture impermeable material covering said layer of conductive paint between said first exposed portion and said second exposed portion.

6. The electrode of claim 4 wherein said layer of essentially moisture impermeable material comprises an acrylate resin.

7. The electrode of claim 1 wherein said means securing said conductor to said sponge comprises an adhesive.

2. an X-ray transparent conductor comprising a flexible, dimensionally stable, nonconductive plastic film, a layer of conductive silver paint adhered to one surface of said film and having a first exposed conductive portion and a second exposed conductive portion spaced from said first exposed conductive portion, and further comprising a continuous insulating covering over said paint between said exposed portions;

a gel filled sponge engaging said first exposed conductive portion; and

means securing said conductor to said sponge.