Electrode lead that avoids electrode array migration from the cochlea
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United States of America Patent
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Feb 26, 2019
Grant Date -
Jan 19, 2017
app pub date -
Jul 14, 2016
filing date -
Jul 15, 2015
priority date (Note) -
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Abstract
A cochlear implant electrode arrangement is described that prevents post-surgical retraction of the electrode array from the cochlea. The arrangement includes an electrode lead that carries cochlear stimulation signals from an implanted signal processor, through an oval shaped posterior tympanotomy opening in the facial recess of a patient, to an electrode array implanted in a cochlea of the patient. A retraction limiter slides over the electrode lead through the posterior tympanotomy with projection arms aligned along the long diameter of the posterior tympanotomy, then is rotated to align the projection arms along the short diameter of the posterior tympanotomy, and secured to the electrode lead so that the projection arms prevent post-surgical retraction of the electrode lead back through the posterior tympanotomy.
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