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Biomedical electrodes

A biomedical and electrode technology, applied in electrodes, bioelectrical signal measurement, medical science, etc., can solve problems such as not very effective

Inactive Publication Date: 2006-10-11
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this measure is hoped to overcome the corrosion problem, it is not very effective, especially when using "bicontinuous" adhesives with both hydrophilic and hydrophobic properties

Method used

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  • Biomedical electrodes
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] This example uses a water-soluble peroxide scavenger as an antioxidant for the synthesis of microemulsion hydrogel adhesives. The prepared microemulsion was used as the conductive adhesive of the present invention. Methods for the preparation of microemulsions are generally disclosed in co-pending and co-applicant US Patent Application 20020188035 (Uy et al.). Specifically, a first mixture was formed by mixing certain amounts of two hydrophilic monomers, namely 14 grams of acrylic acid and 14 grams of polyoxyethylene acrylate, commercially available under the trade designation "AM 90G" ester from Shin-Nakamura Chemical Co. .Ltd. Wakayama Japan obtained. To this was added 14 grams of isooctyl acrylate as a hydrophobic monomer available from, for example, Atofina Chemicals, Inc. Philadelphia, PA. To this was added 18 grams of surfactant, commercially available under the trade designation "Brij 97" from Uniqema, New Castle, DE. Then, 0.5 g of a photoinitiator (commercia...

Embodiment 1 and comparative example A

[0112] Samples of Example 1 and Comparative Example A were each sealed in foil pouches and aged at 150°F for 6 weeks. Samples of the material of Example 1 and Comparative Example A were periodically taken out and tested for corrosion by measuring the non-contact conductance of the substrate. Conductance was measured using a Delcom 707 Conductivity Monitor manufactured by Delcom Instruments Inc. Prescott, WI. The results show that in Figure 4 , where the Y-axis corresponds to the substrate conductance (mho), and the X-axis corresponds to the equivalent aging time of the electrode at room temperature (70°F). The equivalent aging time was calculated using Vont Hoff's rule, which shows that the chemical reaction rate doubles for every 10°C increase in temperature.

Embodiment 2

[0114] Experimental samples were made using the procedure of Example 1, except that the peroxide scavenger methionine used in Example 1 was replaced with 0.5 grams of thiodipropionic acid (commercially available from Sigma Chemicals, Milwaukee, WI).

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Abstract

A biomedical electrode is provided wherein the electrode comprises a conductor (14) in contact with a conductive medium (15), the conductor comprises an electrically conductive surface (14) comprising an active source of silver and the conductive medium (15) comprises a peroxide scavenger. The biomedical electrode typically will include a non-conductive backing (12) having a first side (13) comprising a first major surface and a second side comprising a second major surface, the electrically conductive surface (14) being associated with the second major surface of the non-conductive backing (12), and the conductive medium comprises an electrically conductive adhesive associated with the conductive substrate, the electrically conductive adhesive being a pressure sensitive adhesive comprising the at least one peroxide scavenger. A method for the manufacture of the foregoing electrodes is also provided.

Description

[0001] The present invention relates to biomedical electrodes and also to methods of making such electrodes. In particular, the present invention relates to biomedical electrodes comprising a conductor having a conductive surface associated with a conductive medium and a peroxide scavenger. Background technique [0002] There are many medical procedures used in modern medicine in which electrical signals or currents are received from or transmitted to a patient's body. The interface between the medical device used in these procedures and the patient's skin often includes biomedical electrodes. Such electrodes typically include conductors that are electrically connected to the device and a conductive medium that adhesively or otherwise contacts the patient's skin. Biomedical electrodes have been used as part of therapeutic and diagnostic medical procedures and devices. [0003] Therapeutic devices and procedures using these devices use biomedical electrodes. For example, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N1/04A61B5/0408A61L24/00C09J9/02C09J7/02G06Q30/00
CPCA61B5/04087A61N1/0492A61N1/0456A61N1/0496A61N1/0452A61B2562/125A61N1/046A61B2562/0215A61B5/259A61N1/04
Inventor 维诺德·P·梅农
Owner 3M INNOVATIVE PROPERTIES CO