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Detachable pusher-vasoocclusive coil assembly with interlocking coupling

  • US 5,304,195 A
  • Filed: 01/21/1993
  • Issued: 04/19/1994
  • Est. Priority Date: 12/12/1991
  • Status: Expired due to Fees
First Claim
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1. A detachable pusher-vasoocclusive coil assembly for use in occluding a selected site within a vessel comprising in combination:

  • (a) a vasoocclusive coil having a proximal end that carries a first radial protuberance;

    (b) a pusher having a distal end and having an affixed, distally-extending radially biased member that carries a second radial protuberance located distally on the radially biased member, said second radial protuberance axially overlapping and interlocking with the first radial protuberance; and

    (c) means carried coaxially about the pusher and coil that is axially movable relative to the coil and pusher from a first position at which the means enclosed the overlapped, interlocked protuberances to prevent said protuberances from substantial radial movement relative to each other to a second position at which the means does not enclose the protuberance and the protuberances are free to disengage, wherein the radially biased member on the pusher causes disengagement of the pusher from the vasoocclusive coil upon axial movement of the means carried about the pusher and coil from the first position to the second position.

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