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Retractable-wire catheter device and method

  • US 5,217,484 A
  • Filed: 06/07/1991
  • Issued: 06/08/1993
  • Est. Priority Date: 06/07/1991
  • Status: Expired due to Term
First Claim
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1. Apparatus for use in producing vaso-occlusion at a selected site in a body vessel comprisinga catheter having proximal and distal ends and an interior lumen extending therebetween, and adapted for placement of its distal end adjacent such selected site,a vaso-occlusion wire extendable from a relaxed condition capable of assuming a convoluted condition, to an extended, linear condition in which the wire can be advanced through said lumen,a pusher which is controllable from the proximal catheter end to advance said wire, with such in its extended condition, through said catheter by contact between confronting ends of the pusher and wire,a radial enlargement carried on one of such confronting ends, and expandable clamping structure associated with the other of such confronting ends for movement between a closed condition produced by contact of the structure with the catheter lumen, in which the clamping structure is effective to hold the radial enlargement in clamping structure is expanded to release the radial enlargement, andrelease means in said catheter, adjacent its distal end, for releasing the clamping structure from its closed to its open condition when a selected portion of the wire has been advanced beyond the distal catheter end.

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