Electrode for measuring electrophysiological signals using liquid electrolytic gel with a high salt concentration
AssigneeAspect Medical Systems, Inc.
InventorsRafael M. Cordero, Philip H. Devlin
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Abstract
An electrophysiological electrode includes multiple layers of materials to isolate liquid electrolytic gels from the conductive inks on the flexible circuit of the electrode substrate. Such an electrode has a much longer shelf life under normal storage conditions than other electrodes of such construction with high salt content liquid electrolytic gel, and is able to maintain acceptable impedance upon its eventual use.
Claims15
An electrode for measuring electrophysiological signals, the electrode comprising:
- a substrate of flexible non-conductive non-metallic material;
- a conductive metal ink layer deposited on said substrate;
- a physically distinct barrier layer of silver/silver chloride (AG/AgCl) deposited over and contiguous with said conductive metal ink layer,
- predispensed salt content based conductive gel;
- wherein said barrier layer isolates said conductive ink layer from said conductive gel.
An electrode for measuring electrophysiological signals, the electrode comprising:
- a conductive gel;
- a substrate of flexible non-conductive material;
- a conductive ink circuit printed on said substrate;
- a barrier layer of conductive material placed between said conductive ink circuit and said gel;
- a ring or pad of nonconductive material positioned between a surface of said flexible substrate bearing a conductive ink circuit and said barrier layer of conductive material, said ring or pad of nonconductive material extending from the outer edge of the barrier layer of conductive material to an extent sufficient to act as an isolating gasket to completely separate the conductive ink circuit from the conductive gel.
An electrode for measuring electrophysiological signals, the electrode comprising:
- a conductive gel;
- a substrate of flexible non-conductive material;
- a conductive ink circuit printed on said substrate;
- a barrier layer of conductive material placed between said conductive ink circuit and said gel, said barrier layer being a solid hydrogel.
Dependencies are inferred from the claim text.