Detachable pusher-vasoocclusive coil assembly with interlocking coupling
First Claim
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.
1 Assignment
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Accused Products
Abstract
A pusher-vasoocclusive coil assembly that is advanced through a catheter to a site within a vessel and is manipulated to detach the coil from the assembly. The coil has an affixed, proximally-extending wire that carries a ball on its proximal end and the pusher has an affixed, distally-extending wire that carries a ball on its distal end. The pusher and coil are coupled by placing the wires and balls in an overlapping interlocked position and enclosing the coupled assembly with a coaxial sleeve. The coil-pusher-sleeve assembly is positioned at the site and the sleeve is retracted to allow the balls to move radially relative to one another to disengage and uncouple the pusher and coil.
664 Citations
10 Claims
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1. A detachable pusher-vasoocclusive coil assembly for use in occluding a selected site within a vessel comprising in combination:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification