Abstract: An electrolyte (70) for use in a single-use biomedical electrode assembly (A, B, C, D) designed for receiving body-generated electrical signals at a patient's skin surface includes:
Component
Range (%)
Skin penetration agent
10-25
Thickener
0-10
Alkali metal or alkaline earth
1-13
metal chloride
Alkali metal or alkali earth
1-13
metal nitrate
Surfactant
0.001-5
Soluble silver salt, as silver
0-0.01
Buffer
0-10
Water
Q.S.
The skin penetration agent improves penetration of the outer, dead skin layers by the electrolyte, thereby improving pickup of minute electrical signals generated within the patient's body. A preferred skin penetration agent includes sodium 2-pyrrolidone-5 carboxylate at a concentration of 15-20% by weight of the electrolyte composition.
Type:
Grant
Filed:
May 5, 1999
Date of Patent:
April 2, 2002
Assignee:
Biosignal Partners
Inventors:
Roger E. Bremer, Daniel T. Pogany, John M. Questel