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Bidirectional helical electrode for nerve stimulation

  • US 4,920,979 A
  • Filed: 10/12/1988
  • Issued: 05/01/1990
  • Est. Priority Date: 10/12/1988
  • Status: Expired due to Term
First Claim
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1. An electrode assembly for implantation on a nerve, comprising:

  • a flexible supporting matrix of dielectric material, the matrix forming a pair of spaced-apart and oppositely directed helical portions, each helical portion extending circumferentially at least 360 degrees and less than 720 degrees;

    a flexible, conductive electrode secured to an inner surface of one of the helical portions; and

    a flexible connection means connected to the electrode and extending from the matrix for connection to an electronic device;

    the assembly having a central passage longitudinally therethrough and sized to conform to the external dimension of the nerve, whereby a tool can be inserted in the passage to expand the helical portions to open a lateral passage along the full length of the assembly to enable the assembly to be fitted over and closed upon the nerve.

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