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Spinal electrode catheter

  • US 5,374,285 A
  • Filed: 07/30/1993
  • Issued: 12/20/1994
  • Est. Priority Date: 07/31/1992
  • Status: Expired due to Fees
First Claim
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1. A spinal electrode catheter for the subcutaneoas stimulation of areas of the vertebral column and the spinal bone marrow, comprising at least one first tubular outer sheath fashioned in biocompatible material, stopped at one end and insertable into a subcutaneous vertebral area and accommodating a set of electrically conductive wires disposed substantially parallel one with another and insulated individually by respective second sheaths, each of which connected by one end to a corresponding terminal or sensor positioned externally of the first sheath in such a way as to establish an electrode, and by the remaining end to a stimulator, and further comprising:

  • a flexible spiral wound element associated co-axially with and extending substantially the full length of the first sheath in such a way as to establish an internal core by which the sheath is invested with rigidity during insertion into the subcutaneous area and with flexibility allowing adaptation of the electrode catheter to the cavity ultimately occupied following implantation, while functioning as a support for said wires of which the ends associated with the sensors are bared from their insulating sheaths and caused to emerge from the first outer sheath by way of corresponding breakout holes;

    a first contact ring associated with each of the wires, positioned adjacent to the relative breakout hole and secured coaxially to the first sheath in such a manner as to afford a support against which the bared end of the wire is bent and flattened;

    a second encapsulating ring associated with each wire, fashioned from electrically conductive and biocompatible material and secured over the bared and flattened end of the wire and the first ring in such a way as to complete the composition of the sensor or electrode.

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