Highly conductive non-stringy adhesive hydrophilic gels and medical electrode assemblies manufactured therefrom
First Claim
1. A highly conductive non-stringy adhesive hydrophilic gel comprising a cohesive uniform aqueous mixture of poly(vinyl pyrrolidone) (PVP), a viscosity-enhancing hydrophilic polymer having a weight average molecular weight in excess of about 100 kilodaltons (kD), and an amount of a water-soluble electrolyte effective to reduce the transverse electrical resistance of said aqueous mixture to an impedance at 60 Hz of less than about 1,000 ohms,which aqueous mixture had been exposed to a dose of radiant energy effective to provide a highly conductive non-stringy adhesive hydrophilic gel which exhibits a sharp, substantially featureless force-displacement curve, having a force value of least about 180 grams and an Adhesion Energy Density (AED) of at least about 5 to less than about 50 g/cm.
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Accused Products
Abstract
The highly conductive hydrogels of this invention are comprised of a cohesive uniform mixture of poly(vinyl pyrrolidone), a viscosity-enhancing hydrophilic polymer, and an effective amount of an electrolyte. This polymeric mixture which is crosslinked by exposure to radiant energy provides a gel-like solid which is sufficiently tacky and adhesive to adhere to the subjects'"'"' skin and yet is substantially non-stringy and non-aggressive such that the use of such hydrogel imparts less discomfort to the user. In addition, the consumer utilizing the product of this invention would not experience the objectionable sticky, stringy sensation associated with existing conductive adhesive gels.
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Citations
39 Claims
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1. A highly conductive non-stringy adhesive hydrophilic gel comprising a cohesive uniform aqueous mixture of poly(vinyl pyrrolidone) (PVP), a viscosity-enhancing hydrophilic polymer having a weight average molecular weight in excess of about 100 kilodaltons (kD), and an amount of a water-soluble electrolyte effective to reduce the transverse electrical resistance of said aqueous mixture to an impedance at 60 Hz of less than about 1,000 ohms,
which aqueous mixture had been exposed to a dose of radiant energy effective to provide a highly conductive non-stringy adhesive hydrophilic gel which exhibits a sharp, substantially featureless force-displacement curve, having a force value of least about 180 grams and an Adhesion Energy Density (AED) of at least about 5 to less than about 50 g/cm.
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29. A conductive wound dressing comprising a conductive non-stringy adhesive hydrophilic gel, which gel comprises a cohesive uniform aqueous mixture of poly(vinyl pyrrolidone) (PVP), a viscosity-enhancing hydrophilic polymer having a weight average molecular weight in excess of about 100 kilodaltons (kD), and a sufficient amount of a water-soluble electrolyte,
which aqueous mixture had been exposed to a dose of radiant energy affective to provide a highly conductive non-stringy adhesive hydrophilic gel which exhibits a sharp, substantially featureless force-displacement curve, having a force value of at least about 180 grams and an Adhesion Energy Density (AED) of at least about 5 to less than about 50 g/cm.
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31. An electrode comprising:
- (a) a highly conductive non-stringy adhesive hydrophilic gel, which gel comprises a cohesive uniform aqueous mixture of poly(vinyl pyrrolidone) (PVP), a viscosity-enhancing hydrophilic polymer having a weight average molecular weight in excess of about 100 kilodaltons (kD), and an amount of a water-soluble electrolyte effective to reduce the transverse electrical resistance of said aqueous mixture to an impedance at 60 Hz of less than about 1,000 ohms,
which aqueous mixture had been exposed to a dose of radiant energy effective to provide a highly conductive non-stringy adhesive hydrophilic gel which exhibits a sharp, substantially featureless force-displacement curve, having a force value of at least about 180 grams and an Adhesion Energy Density (AED) of at least about 5 to less than about 50 g/cm; and
(b) a conductive member, in intimate contact with said gel, to which may be connected external electrical apparatus. - View Dependent Claims (32, 33, 38, 39)
- (a) a highly conductive non-stringy adhesive hydrophilic gel, which gel comprises a cohesive uniform aqueous mixture of poly(vinyl pyrrolidone) (PVP), a viscosity-enhancing hydrophilic polymer having a weight average molecular weight in excess of about 100 kilodaltons (kD), and an amount of a water-soluble electrolyte effective to reduce the transverse electrical resistance of said aqueous mixture to an impedance at 60 Hz of less than about 1,000 ohms,
Specification