Pocket ECG electrode
First Claim
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1. In a subcutaneous electrode apparatus for measuring electrocardiograms:
- an electrically conductive pocket-shaped member having an opening and a lumen, said member being adapted to be chronically subcutaneously implanted in the tissue and body fluid of a subject in which electrocardiograms are to be sensed;
said opening being an elongated mouth adapted to permit body fluids to enter said lumen and contact the inner surface of said member;
electrical conductor means including an electrically conductive wire structure for making electrical connection to said pocket-shaped member;
means bonded to said pocket-shaped member for receiving sutures when said electrode apparatus is implanted in tissue; and
electrically insulative means for coating the outer surface and mouth region of said pocket-shaped member whereby when the electrode apparatus is implanted the body fluid acts as an electrolyte and the electrode/electrolyte interface is situated within the lumen remote from possible tissue disturbances.
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Abstract
A low-noise electrode suited for sensing electrocardiograms when chronically and subcutaneously implanted in a free-ranging subject. The electrode comprises a pocket-shaped electrically conductive member with a single entrance adapted to receive body fluids. The exterior of the member and the entrance region is coated with electrical insulation so that the only electrolyte/electrode interface is within the member remote from artifact-generating tissue. Cloth straps are bonded to the member to permit the electrode to be sutured to tissue and to provide electrical lead flexure relief.
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Citations
7 Claims
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1. In a subcutaneous electrode apparatus for measuring electrocardiograms:
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an electrically conductive pocket-shaped member having an opening and a lumen, said member being adapted to be chronically subcutaneously implanted in the tissue and body fluid of a subject in which electrocardiograms are to be sensed; said opening being an elongated mouth adapted to permit body fluids to enter said lumen and contact the inner surface of said member; electrical conductor means including an electrically conductive wire structure for making electrical connection to said pocket-shaped member; means bonded to said pocket-shaped member for receiving sutures when said electrode apparatus is implanted in tissue; and electrically insulative means for coating the outer surface and mouth region of said pocket-shaped member whereby when the electrode apparatus is implanted the body fluid acts as an electrolyte and the electrode/electrolyte interface is situated within the lumen remote from possible tissue disturbances. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification