Iontophoretic delivery device
First Claim
1. An electrically powered iontophoretic delivery device including a donor electrode assembly, a counter electrode assembly and a source of electrical power adapted to be electrically connected to the donor electrode assembly and the counter electrode assembly, at least one of the electrode assemblies including an agent reservoir containing an agent, the agent reservoir adapted to be placed in agent transmitting relation with a body surface;
- and an electrode adapted to be electrically connected to the source of electrical power and to the agent reservoir;
wherein the electrode comprises;
a hydrophobic polymeric matrix;
about 10 to 50 vol % of an agent which can absorb a liquid solvent thereby forming a plurality of ion-conducting pathways through the matrix; and
about 5 to 40 vol % of a chemical species able to undergo oxidation or reduction during operation of the device.
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Accused Products
Abstract
An electrically powered iontophoretic delivery device is provided. The device utilizes electrodes composed of a preferably hydrophobic polymeric matrix. The matrix contains about 10 to 50 vol % of a material capable of absorbing a liquid solvent, typically water, to provide a plurality of ion conducting pathways through the matrix. The matrix also contains about 5 to 40 vol % of a chemical species which is able to undergo either oxidation or reduction during operation of the device. Preferably, the solvent absorbing material is a hydrophilic polymer such as polyvinylpyrrolidone. For the anodic electrode, the chemical species should be able to undergo oxidation and is preferably either silver or zinc. For the cathodic electrode, the chemical species should be able to undergo reduction and is preferably silver chloride or a reducible metal.
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Citations
24 Claims
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1. An electrically powered iontophoretic delivery device including a donor electrode assembly, a counter electrode assembly and a source of electrical power adapted to be electrically connected to the donor electrode assembly and the counter electrode assembly, at least one of the electrode assemblies including an agent reservoir containing an agent, the agent reservoir adapted to be placed in agent transmitting relation with a body surface;
- and an electrode adapted to be electrically connected to the source of electrical power and to the agent reservoir;
wherein the electrode comprises;a hydrophobic polymeric matrix; about 10 to 50 vol % of an agent which can absorb a liquid solvent thereby forming a plurality of ion-conducting pathways through the matrix; and about 5 to 40 vol % of a chemical species able to undergo oxidation or reduction during operation of the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
- and an electrode adapted to be electrically connected to the source of electrical power and to the agent reservoir;
Specification