Functionalized microneedles transdermal drug delivery systems, devices, and methods
First Claim
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1. A transdermal drug delivery system for delivering of one or more therapeutic active agents to a biological interface, comprising:
- a surface functionalized substrate having a first side and a second side opposing the first side, the surface functionalized substrate comprising a plurality of microneedles projecting outwardly from the first side, each microneedle having an outer surface and an inner surface that forms a channel, the channel operable for providing fluidic communication between the first and the second sides of the surface functionalized substrate, at least one of the inner surface or the outer surface comprising one or more functional groups.
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Abstract
Systems, devices, and methods for transdermal delivery of one or more therapeutic active agents to a biological interface. A transdermal drug delivery system is operable for delivering of one or more therapeutic active agents to a biological interface. The system includes an active electrode assembly, a counter electrode assembly, and a plurality of functionalized microneedles.
278 Citations
26 Claims
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1. A transdermal drug delivery system for delivering of one or more therapeutic active agents to a biological interface, comprising:
a surface functionalized substrate having a first side and a second side opposing the first side, the surface functionalized substrate comprising a plurality of microneedles projecting outwardly from the first side, each microneedle having an outer surface and an inner surface that forms a channel, the channel operable for providing fluidic communication between the first and the second sides of the surface functionalized substrate, at least one of the inner surface or the outer surface comprising one or more functional groups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. The transdermal drug delivery system 12 wherein the power source comprises at least one of a chemical battery cell, super- or ultra-capacitor, a fuel cell, a secondary cell, a thin film secondary cell, a button cell, a lithium ion cell, zinc air cell, and a nickel metal hydride cell.
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14. A microneedle structure, comprising:
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a substrate having an exterior and an interior surface, a first side, and a second side opposing the first side; and
a plurality of microneedles projecting outwardly from the first side of the substrate, each microneedle having a proximate and a distal end, an outer surface and an inner surface forming a channel exiting between the proximate and the distal ends to provided fluid communication there between;
wherein at least the inner surface of the microneedles is modified with one or more functional groups. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A method of forming an iontophoretic drug delivery device for providing transdermal delivery of one or more therapeutic active agents to a biological interface, comprising:
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forming a plurality of hollow microneedles, having an interior and an exterior surface on a substrate having a first side and a second side opposing the first side, the plurality of hollow microneedles substantially formed on the first side of the substrate;
functionalizing at least the interior surface of the plurality of hollow microneedles to include one or more functional groups; and
physically coupling the substrate to an active electrode assembly, the active electrode assembly including at least one active agent reservoir and at least one active electrode element, the at least one active agent reservoir in fluidic communication with the plurality of hollow microneedles, the at least one active electrode element operable to provide an electromotive force to drive an active agent from the at least one active agent reservoir, through the plurality of hollow microneedles, and to the biological interface. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification