Cohesive nonsticky electrically conductive gel composition
First Claim
1. An electrically conductive gel for use in establishing a low resistance contact between an electrode and a biological body, comprising an aqueous solution of crosslinked natural gum, said crosslinked natural gum being present in said aqueous solution in sufficient quantity to impart a gel-like body to the material and to provide the electrically conductive gel with sufficient internal strength to remain cohesive without reinforcement, said aqueous solution comprising ionized salts in a concentration of 0.8 to 25 percent by weight, and water in a concentration of from about 16 to 93 percent by weight, and said gel being nonsticky in character.
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Abstract
A cohesive nonsticky electrically conductive gel is disclosed, for facilitating low resistance contact between a metal electrode and a biological body. The gel comprises an aqueous solution of up to saturated concentrations of ionized salts as the conducting agent, a natural gum capable of crosslinking, and a crosslinking material which provides the electrically conductive gel with sufficient internal strength to remain cohesive without reinforcement. The gel has good electrical characteristics and improved physical properties which prevent the gel from leaving a messy residue on the skin of the patient or on the electrode.
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18 Claims
- 1. An electrically conductive gel for use in establishing a low resistance contact between an electrode and a biological body, comprising an aqueous solution of crosslinked natural gum, said crosslinked natural gum being present in said aqueous solution in sufficient quantity to impart a gel-like body to the material and to provide the electrically conductive gel with sufficient internal strength to remain cohesive without reinforcement, said aqueous solution comprising ionized salts in a concentration of 0.8 to 25 percent by weight, and water in a concentration of from about 16 to 93 percent by weight, and said gel being nonsticky in character.
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14. An electrically conductive gel for use in establishing a low resistance contact between a metal electrode and a biological body, comprising:
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(a) about 2.4 percent by weight sodium chloride; (b) about 2.0 percent by weight guar gum; (c) about 0.57 percent by weight potassium tetraborate; (d) about 15.0 percent by weight propylene glycol; (e) about 0.1 percent by weight methyl-p-hydroxy benzoate; (f) about 0.02 percent by weight propyl-p-hydroxy benzoate; and (g) about 79.91 percent by weight water.
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Specification