Disc therapy
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United States of America Patent
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Apr 24, 2018
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app pub date -
Sep 13, 2016
filing date -
Sep 13, 2016
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Abstract
Apparatus is provided that includes at least one intra-pulposus exposed electrode surface, configured to be implanted in a nucleus pulposus of an intervertebral disc, and a plurality of extra-pulposus exposed electrode surfaces, configured to be implanted outside the nucleus pulposus, in electrical communication with the intervertebral disc. Control circuitry is configured to separately control at least two of the plurality of extra-pulposus exposed electrode surfaces, and to repeatedly alternatively assume: (a) a pressure-increasing mode of operation, in which fluid is electroosmotically driven into the nucleus pulposus to increase pressure in the intervertebral disc, by applying a first mean voltage of less than 1.23 V between the exposed electrode surfaces, and (b) an oxygen-generating mode of operation, in which oxygen is generated within the nucleus pulposus by electrolysis, by applying a second mean voltage of at least 1.23 V between the exposed electrode surfaces. Other embodiments are also described.
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