Iontophoretic drug delivery system and method

Details Iontophoretic drug delivery system and method Iontophoretic drug delivery system and method

A - Human Necessities

61

N

A61N 1/30 (2006.01) A61N 1/32 (2006.01)

Patent

CA 2172991

An iontophoretic drug delivery device (20) includes a power source (23) and an electrode assembly (24) containing at least two electrodes (32, 42) in electrical contact with a first reservoir (34) and a second reservoir (44) or at least three electrodes in a three electrode embodiment, with the third electrode (52) in electrical contact with a third reservoir (54). The present invention includes in its two electrode embodiment a switch (56) for reversing the flow of current or in its three electrode embodiment a switch (66) for switching the flow of current, so as to reduce sensation. The devices also include a timer (58) for controlling the amount of time the electrical current flows in each direction. The devices are timed to deliver an active agent to the area approximate the second reservoir (44) when the electrical current flows in the other direction.

Dispositif (20) d'administration d'anesthésiants par iontophorèse comportant une alimentation (23) et un ensemble (24) d'au moins deux électrodes (32, 42) en contact avec un premier (34) et un second (44) réservoir. L'invention porte également sur une variante à trois électrodes ou plus, dont la troisième (52) est en contact avec un troisième réservoir (54). Dans sa version à deux électrodes, l'invention comporte un bouton d'inversion du courant (56), et, dans sa version à trois électrodes, un bouton de commutation du courant (66) de façon à diminuer la perception. Le dispositif comprend également un minuteur (58) réglant le temps de passage du courant électrique dans les deux sens. Ainsi, le dispositif délivre un agent actif dans des zones correspondant au premier et au second (44) réservoir quand le courant passe dans l'un ou l'autre sens.

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