Implant delivery assembly with expandable coupling/decoupling mechanism
AssigneeTarget Therapeutics, Inc.
InventorsIvan Sepetka, U. Hiram Chee
Life of this patent
Estimating the term…
Abstract
An occlusive implant delivery assembly includes a rapid response decoupling or detachment mechanism that does not effect significant migration of the implant during release. The assembly includes an occlusive implant device, such as an embolic coil, a pusher or device to carry the implant to the selected location, and an expandable coupling-decoupling mechanism for releasing the implant at the selected site. The mechanical construction provides rapid release times. In addition, the releasing mechanism generally operates without exerting any significant force on the implant, thereby avoiding any significant displacement of the implant during release.
Claims36
An occlusive implant delivery assembly for occluding a site in a mammal, said assembly comprising:
- an occlusive implant having a tubular portion;
- a pusher having a distal section;
- and
- an extendable member coupled to said distal section of the pusher and frictionally held in said tubular portion when not extended, such that during extension of said extendable member, said implant separates from said pusher,
- said extendable member further having a plurality of ribs that extend radially outward and engage said tubular portion when said extendable member is not extended.
An occlusive implant delivery assembly for occluding a site in a mammal, said assembly comprising:
- an occlusive implant having a tubular portion;
- a pusher having a distal section;
- an extendable member coupled to said distal section of the pusher and frictionally held in said tubular portion when not extended such that during extension of said extendable member, said implant separates from said pusher;
- and
- a core member positioned within said extendable member.
An occlusive implant delivery assembly for occluding a site in a mammal, said assembly comprising:
- an occlusive implant having a tubular portion,
- a pusher having a distal section;
- a retractable core member slidably disposed within said pusher and extending into said tubular portion;
- and
- a locking member releasably coupled to the interior of said tubular portion;
- where said core member is slidably engageable to said locking member;
- where said pusher is engageable with said occlusive implant and allows delivery of said implant through a delivery sheath and into said site when said core member is extended and engaged with said locking member,
- whereby during retraction of said core member, said locking member uncouples from said tubular portion and said implant uncouples from said pusher.
An implant delivery assembly for occluding a site in a mammal, the assembly comprising:
- an occlusive implant,
- a pusher having a proximal section and a distal section,
- a selectively operable coupling for attaching the implant to the pusher distal section, said coupling operable by fluid pressure so that when a sufficient amount of fluid pressure is applied to the coupling, the fluid pressure causes the occlusive implant to separate from the pusher.
An apparatus for use in occluding a body cavity comprising:
- a wire;
- a detachable occlusive implant coupled to said wire, said implant detachable from said wire by fluid pressure.
A method for rapidly detaching an occlusive implant into a mammalian site comprising the steps of:
- a) introducing an assembly comprising
- i. the occlusive implant,
- ii. a pusher having a distal section and a proximal section, and
- iii. a coupling, wherein the occlusive implant is attached to the pusher distal section at the coupling, into the mammalian site, and
- b) delivering the occlusive implant to the mammalian site by applying sufficient fluid pressure to the assembly so that the occlusive implant disengages from the pusher distal section at the coupling.
A method for rapidly detaching an occlusive implant into a body cavity comprising the steps of:
- a) introducing into a body cavity an assembly comprising an occlusive implant that is detachably affixed to a pusher, and
- b) delivering fluid pressure through the pusher such that the implant detaches from the pusher by the fluid pressure.
Dependencies are inferred from the claim text.