Non-metallic pregelled electrode
First Claim
1. A medical electrode pad for attachment to the skin comprising a disk of electrically nonconductive material having a flat base and a centrally located cup shaped cavity therein, an electrolyte saturated porous plastic matrix received in said cavity, an adhesive on the surface of said flat base, and a release backing covering the adhesive surface and enclosing the matrix in the cavity;
- puncturable membrane means in said disc adapted to be punctured by a connector, and a removable electrically conductive connector inserted through and puncturing said membrane means and being in intimate contact with said electrolyte saturated porous plastic matrix.
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Accused Products
Abstract
An electrode pad, an electrical lead wire connector, and an electrode system composed of the pad and connector which exhibits a DC offset of about 1mV, an AC impedance of less than 100Ω, and a stable rectification of less than 0.2mV.
The electrode pad of the system, for attachment to the skin for detecting biological or physiological electrical potentials, includes an electrically non-conductive disc, an electrolyte saturated porous matrix in the disc and integral provision for attaching an electrical connector, the pad having no metal components.
The electrical connector has an electrically conductive probe at one end composed of a non-conductive plastic with a conductive silver and silver chloride coating thereover.
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Citations
14 Claims
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1. A medical electrode pad for attachment to the skin comprising a disk of electrically nonconductive material having a flat base and a centrally located cup shaped cavity therein, an electrolyte saturated porous plastic matrix received in said cavity, an adhesive on the surface of said flat base, and a release backing covering the adhesive surface and enclosing the matrix in the cavity;
- puncturable membrane means in said disc adapted to be punctured by a connector, and a removable electrically conductive connector inserted through and puncturing said membrane means and being in intimate contact with said electrolyte saturated porous plastic matrix.
- View Dependent Claims (2, 3, 4, 5)
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6. A medical electrode pad having no metallic components for use on the skin for detecting biological electrical potentials comprising a one-piece disc of flexible electrically insulating thermoplastic material having a central cover element, a vertical periphery wall depending from said central cover element, said central element and vertical wall defining a central cavity, and a peripheral element having a lower surface extending out from said wall;
- a porous plastic matrix received in said central cavity;
an electrolyte solution saturating said porous matrix and filling said central cavity;
an adhesive covering said lower surface of said peripheral element;
a release backing covering said adhesive and enclosing and hermetically sealing said plastic matrix and electrolyte solution in said cavity; and
means in said cover element for receiving and guiding a removable electrically conductive probe into intimate contact with said matrix and electrolyte solution, said means for receiving and guiding the probe consisting of one or more slots in said cover element extending to said vertical wall, and a puncturable membrane sealing the slot or slots from the ambient. - View Dependent Claims (7)
- a porous plastic matrix received in said central cavity;
- 8. A pad for detecting biological electrical potential comprising an electrically nonconductive one-piece disc formed with a central dome defining a recess in the pad, an electrically nonconductive porous matrix retained in and covered on its top and sides by said dome of the disc, an electrolyte solution contained in said matrix, said disc and matrix combination being disposable, and a reusable electrically conductive connector in contact with said matrix and the electrolyte solution and extending through the dome of said disc, said entire connector being removable from and separable from said dome and matrix through said dome.
Specification