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Assembly for placement of embolic coils using frictional placement

  • US 5,312,415 A
  • Filed: 09/22/1992
  • Issued: 05/17/1994
  • Est. Priority Date: 09/22/1992
  • Status: Expired due to Fees
First Claim
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1. A detachable pusher-coil assembly for use in occulding a selected site within a vessel comprising;

  • (a) a catheter sheath having a proximal end and a distal end, the distal end having a constricted distal tip, the constricted distal tip having an interior shape to frictionally engage but allow controlled passage of one or more separate embolic coils;

    (b) a guidewire extending from the proximal end to the distal end of the catheter sheath and within the catheter sheath, said guidewire having a tip, said guidewire tip having an outer diameter which approximates an inner diameter of said one or more separate embolic coils, said guidewire tip for frictionally engaging an interior of said one or more embolic coils;

    (c) a plurality of said separate embolic coils situated on said guidewire, each said separate embolic coil having an outer diameter sufficiently large to frictionally engage the constricted distal tip of the catheter sheath;

    (d) a pusher sheath situated within the inside diameter of the catheter sheath proximal to the plurality of separate embolic coils and in which the guidewire passes therethrough, the pusher sheath having a diameter sufficient to be moved axially toward the distal end of the catheter sheath and thereby push said separate embolic coils through the distal end of the catheter sheath.

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