Bio-electrode and method of producing thereof

• US 5,370,115 A
• Filed: 03/17/1993
• Issued: 12/06/1994
• Est. Priority Date: 03/17/1992
• Status: Expired due to Term

• Current Assignee: Nihon Kohden Corporation, Rockwell Semiconductor Systems Inc. (Synaptics Incorporated)
• Original Assignee: Nihon Kohden Corporation
• Inventors: Nakajima, Takashi, Ogawa, Keikitsu
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): GREEN, BRIAN
• Application Number:
  US08/032,551
• Time in Patent Office: 629 Days
• Field of Search: 128/639, 128/640, 128/641, 128/647, 607/152, 607/149, 607/153, 252/500
• US Class Current: 600/372
• CPC Class Codes: A61B 5/25 Bioelectric electrodes therefor
• CPC Class Codes: A61B 5/266 containing electrolytes, conductive gels or pastes

Abstract

Disclosure is a bio-electrode which can prevent paste from oozing out and color change from occurring and which allows the measurement to be stably performed even at the time immediately after the application. A catalyst is injected into sponge in a foam tape and then a monomer is injected into the sponge. Thereafter, paste is injected into a center portion of a surface of the sponge which is in the side opposite to an electrode element.

Claims

1. A method of producing a bio-electrode comprising the steps of:

forming a hole at a center portion of a label adhering to one surface of a flat foam tape;

inserting a projection of an electrode element into said hole;

inserting a sponge into a cavity in said foam tape, said sponge to be adhered to said electrode element;

injecting a catalyst into said sponge and then injecting a monomer into said sponge to form a gel; and

injecting high-viscosity paste into a center portion of a surface of said sponge, said sponge surface being in the side opposite to said electrode element.

2. A bio-electrode as claimed in claim 1, wherein said paste has a viscosity in a range between 27,000-32,000 cP.

3. A bio-electrode comprising:

a label having a hole formed at a center portion thereof;

a flat foam tape, said label adhering to one surface of said flat foam tape;

an electrode element having a projection which is inserted into the hole;

sponge inserted into a cavity in the foam tape to be stuck on the electrode element, a catalyst injected into said sponge and a monomer injected into said sponge to form a gel; and

paste injected into a center portion of a surface of said sponge, said surface being in the side opposite to the electrode element.

4. A bio-electrode as claimed in claim 3, wherein said paste has a viscosity in a range between 27,000-32,000 cP.