Mahyar Z. Kermani,Bernard H. Andreas,Rohit Girotra,Mansour A. Saleki,Nikhil D. Bhat
申请号：
US13804491
公开号：
US20140276352A1
申请日:
2013.03.14
申请国别(地区):
US
年份:
2014
代理人:
摘要：
Various systems and methods provide iontophoretic delivery of anesthesia at a patient's tympanic membrane. Some implementations provide channel switching enabling a single current sink to pull current through two electrodes in an alternating fashion based on clock pulses. The iontophoretic delivery of anesthesia may be driven by an AC modulated current. Some implementations provide for continuous flow of fresh iontophoresis fluid to the ear canal during iontophoresis. The fluid flows from a source reservoir into the cavity between the tympanic membrane and a plug, and then drains out of the cavity to a reservoir. An iontophoresis system may also detect capacitance between an anode electrode and an auxiliary electrode in a patient's ear canal, watching for reduced capacitance to indicate presence of a bubble in the iontophoresis fluid.
