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Thrombectomy device with multi-layered rotational wire

  • US 6,926,725 B2
  • Filed: 03/17/2003
  • Issued: 08/09/2005
  • Est. Priority Date: 04/04/2002
  • Status: Expired due to Term
First Claim
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1. In a thrombectomy apparatus for breaking up thrombus or other obstructive material in a lumen of a vascular graft or vessel, the apparatus having a flexible sheath and a wire positioned within the flexible sheath, the wire and flexible sheath being relatively movable so the wire has a first configuration and a second deployed configuration, the wire being sinuous in configuration and assuming its sinuous configuration when in the deployed configuration and having a straighter configuration in the first configuration, the wire being operatively connected to a motor for rotation of the wire to enable peaks of the sinuous wire to contact a wall of the lumen to break up the thrombus or other obstructive material, the improvement comprising the wire formed of an inner core formed by a plurality of twisted wires and an outer wire wound directly around the inner core, a distal portion of the outer wire extending distal of the inner core and progressively tapering towards a distal end to form a tapered region.

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