Patent ID: 7437189
Filing Date: 2008-10-14
Classification: A61N

Abstract:
1. An iontophoresis device having a working electrode structure, said working electrode structure comprising: a first electrode; a biological interface contact member including a substrate having a front surface and a rear surface, and a plurality of needles that protrude from the front surface of the substrate and which can be inserted into a biological interface, the needles including an ion exchange material that allows selective permeation of ions of a first polarity and substantially prevents permeation of ions of a second polarity, opposite to the first polarity; and a drug holding part to hold a drug solution containing drug ions of the first polarity, the drug holding part interposed between the first electrode and the biological interface contact member, wherein the drug ions are driven through the ion exchange material of the needles from the drug holding part in response to an electrical potential applied via the first electrode.