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Apparatus and method for removing a target object from a body passsageway

  • US 4,790,812 A
  • Filed: 11/15/1985
  • Issued: 12/13/1988
  • Est. Priority Date: 11/15/1985
  • Status: Expired due to Term
First Claim
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1. An apparatus for removing a target object from a body passageway by fragmenting the target object into a plurality of fragments and transporting the fragments outside the body, said apparatus comprising:

  • a catheter having proximal and distal open ends and having at least one lumen therethrough;

    a spiral wound coil having proximal and distal ends and rotatably disposed within said lumen in said catheter, said spiral wound coil being resilient and flexible along its length;

    a cutting tip means formed at the distal end of said coil for engaging and fragmenting the target object so that the resulting fragments can be transported within said catheter to outside the body;

    means associated with said catheter for retaining said cutting tip within said catheter and proximate the distal open end of said catheter, thereby preventing said cutting tip from extending out beyond the distal open end of said catheter;

    an elongated control wire slidably disposed within a lumen of said catheter;

    a parachute basket means fixed to the distal end of said control wire and sized and shaped to be advanced through the lumen in a stowed position, said parachute basket means when deployed being capable of permitting the flow of fluid but preventing passage of fragements from the target object;

    means for advancing the control wire and said parachute basket means beyond the distal end of said catheter to permit said parachute basket means to open to a deployed position within the body passageway; and

    a first drive means for rotatably driving said spiral wound coil within said lumen in order to create a flow which pulls the target body through the distal open end of said catheter toward said cutting tip and transports fragmented portions of the target body through said lumen by a screw movement of said coil.

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