Compositions for disposable bio-medical electrodes
First Claim
1. A disposable electrode for providing electrical contact with a patient'"'"'s skin or scalp during sleeping, in order to record electrical waves or brain waves, which comprises an electrically conductive composition having a volume resistivity in the range of between 1000 to 1500 ohms, said composition acting also as an adhesive to the skin or scalp by its remoistable property and comprising:
- a polyvinyl alcohol hydrolysed to an extent of above 72% and present in an amount between 20% and 75% by weight of the composition;
a highly hygroscopic salt selected from the group consisting of magnesium chloride, calcium chloride, aluminum chloride, an alkali metal citrates, an alkali metal acetate and mixtures thereof;
said hygroscopic salt being present in an amount between 3% and 35% by weight of the composition;
a highly electrolytic, alkali metal salt selected from the group consisting of sodium chloride and potassium chloride, said electrolyte alkali metal salt being present in an amount between 1% and 5% by weight of the composition; and
a metal powder selected from the group consisting of aluminum, bronze and silver, said metal powder being present in an amount between 1% and 10% by weight of the composition.
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Accused Products
Abstract
The present invention relates to a disposable electrode for providing electrical contact with a patient'"'"'s scalp or skin during routine EEG or EKG tests, as well as EEG during full sleeping period in order to record electrical brain or skin waves, which comprises an electrically conductive composition having a volume resistivity in the range of between 1000 to 1500 ohms, acting also as an adhesive to the skin or the scalp by its remoistable property. The composition comprises: (1) a partially hydrolysed polyvinyl alcohol; (2) a highly hygroscopic salt selected from an metal salt, or organic chloride salt; (3) a highly electrolytic salt, and (4) a metal powder selected from aluminium, bronze and silver. The performance of the electrode was found to be the same as those known on the market.
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Citations
10 Claims
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1. A disposable electrode for providing electrical contact with a patient'"'"'s skin or scalp during sleeping, in order to record electrical waves or brain waves, which comprises an electrically conductive composition having a volume resistivity in the range of between 1000 to 1500 ohms, said composition acting also as an adhesive to the skin or scalp by its remoistable property and comprising:
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a polyvinyl alcohol hydrolysed to an extent of above 72% and present in an amount between 20% and 75% by weight of the composition; a highly hygroscopic salt selected from the group consisting of magnesium chloride, calcium chloride, aluminum chloride, an alkali metal citrates, an alkali metal acetate and mixtures thereof;
said hygroscopic salt being present in an amount between 3% and 35% by weight of the composition;a highly electrolytic, alkali metal salt selected from the group consisting of sodium chloride and potassium chloride, said electrolyte alkali metal salt being present in an amount between 1% and 5% by weight of the composition; and a metal powder selected from the group consisting of aluminum, bronze and silver, said metal powder being present in an amount between 1% and 10% by weight of the composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification