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Atherectomy device

  • US 5,078,723 A
  • Filed: 12/19/1990
  • Issued: 01/07/1992
  • Est. Priority Date: 05/08/1989
  • Status: Expired due to Term
First Claim
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1. An atherectomy device comprising:

  • a hollow torque cable comprising a first coil of wire wound at a first angle, and a second coil of wire wound concentrically around the first coil at a second angle in an opposite direction;

    the second coil being stretched at its distal end to form a helical screw, the tip segment of the screw portion of second coil being sharpened to facilitate entry of the screw into stenosis tissue;

    a cutter coil slidably mounted concentrically over the torque cable for reciprocal movement in the proximal and distal direction, the cutter coil having a cutting edge mounted on the distal tip of the flat ribbon coil for close scissor-like interaction with the screw;

    control means having rotation means attached to the proximal end of the torque cable for rotating the torque cable to advance the screw into stenosis tissue; and

    cutter advancement means mounted on the cutter coil for moving the cutter coil longitudinally relative to the torque cable.

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