Hydrogel-filled drug delivery reservoirs
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United States of America Patent
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Jun 10, 2014
Grant Date -
May 13, 2010
app pub date -
Nov 9, 2009
filing date -
Nov 10, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A cochlear implant electrode includes an implantable electrode carrier having an outer surface with electrode contacts for electrically stimulating nerve tissue of the inner ear of a patient. A drug lumen is within the electrode carrier and adapted to receive a therapeutic fluid. The drug lumen contains delivery openings to the outer surface of the electrode carrier and a hydrogel matrix disposed between the drug lumen and the one or more delivery openings and adapted to swell in volume when exposed to the therapeutic fluid. The hydrogel matrix is adapted to control diffusion of the therapeutic fluid from the drug lumen through the delivery openings to the outer surface of the electrode carrier.
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