| 摘要 |
An electrokinetic system (300) for delivering a substance into tissue includes an alternating current source (308) of a predetermined frequency. A first electrode is coupled to a first terminal of the alternating current source and a second electrode is coupled to a second terminal of the alternating current source. A rectifying circuit is coupled between the first electrode and the first terminal of the alternating current source. One of the first and second electrodes is adapted for electrical contact with a substance-delivery site. A current rectified by the rectifying circuit flows in a current path between the first and second electrodes when the one of the first and second electrodes is in electrical contact with the substance-delivery site to effect delivery of the substance into the tissue.
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