MULTI-FIBER SHAPE MEMORY DEVICE
A shape memory coiling device ( 5 ) for occluding a vessel or other vascular target includes a shape memory polymer material. The shape memory material is formed in a formation state as a plurality of coiled members ( 10 ) and then constrained in a pre-deployed state as a plurality of elongate members ( 10 ) configured for delivery through a delivery device wherein the plurality of elongate members ( 10 ) are aligned axially with respect to each other and the delivery device ( 20 ). The shape memory material may be formed in an intra-deployed state such that at least one of the plurality of elongate members ( 10 ) will anchor the device ( 5 ) before filling the vascular target and becoming a coiled member. The shape memory material is formed in a deployed state as a plurality of coiled members ( 10 ). In some embodiments, the vascular target is an aneurysm.
1 . A shape memory coiling device for occluding a vessel or other vascular target comprising
a shape memory polymer material that is formed in a formation state as a plurality of coiled members, wherein
in a pre-deployed state the coiled members are constrained as a plurality of elongate members configured for delivery through a delivery device and are aligned axially with respect to each other and the delivery device; and
in a deployed state the elongate members revert to form the plurality of attached coiled members.
2 . The coiling device of claim 1 , wherein the vascular target is an aneurysm.
3 . The coiling device of claim 1 , wherein in an intra-deployed state between the pre-deployed state and the deployed state, at least one of the plurality of elongate members is configured to anchor the coiling device while filling the vascular target and reverting in form to a coiled member.
4 . The coiling device of claim 1 , wherein
the vascular target is an aneurysm and
in an intra-deployed state a distal end of the plurality of elongate members coil upon delivery through the delivery device to form a coil pack within the vascular target that enlarges with addition of more length of the elongate members exiting the deliver device.
5 . The coiling device of claim 1 , wherein in the formation state the plurality of coiled members are attached to each other at a proximal end of each of the plurality of coiled members in a connection member
6 . The coiling device of claim 1 , wherein the plurality of elongate members are connected together at an intermediate point of each of the plurality of elongate members.
7 . The coiling device of claim 1 , wherein the plurality of elongate members is folded at an intermediate point of each of the plurality of elongate members.
8 . The coiling device of claim 7 , wherein the plurality of elongate members is operably connected at the intermediate points.
9 . The coiling device of claim 1 , wherein the plurality of coiled members includes members having different curl and arc shapes with respect to each other.
10 . The coiling device of claim 1 , wherein two or more of the coiled members have varying diameters.
11 . The coiling device of claim 1 , wherein one or more of the coiled members is helical in shape.
12 . The coiling device of claim 1 , wherein at least one of the plurality of coiled members comprises at least two zones of material with different material properties selected from the group comprising a modulus and a glass transition temperature (Tg).
13 . The coiling device of claim 12 , wherein the at least two zones of material are aligned relative to each individual elongate member.
14 . The coiling device of claim 12 , wherein the at least two zones of material are not aligned relative to each individual elongate member.
15 . The coiling device of claim 1 , wherein each of the plurality of elongate members has a common length.
16 . The coiling device of claim 1 , wherein each of the plurality of elongate members has a different length.
17 . A method of manufacturing a shape memory coiling device for occluding a vascular target comprising
providing a delivery device having a pusher mechanism with a detachment feature;
providing a shape memory polymer material;
forming a plurality of coiled members from the shape memory polymer material in a formation state;
constraining the plurality of coiled members in a pre-deployed state as a plurality of elongate members;
arranging the plurality of elongate members in parallel;
providing a retaining loop across an intermediate point of each individual member of the plurality of elongate members;
folding the plurality of elongate members about the retaining loop to form a proximal end of the plurality of elongate members at the retaining loop and a distal end of the plurality of elongate members at adjacent free ends of the plurality of elongate members; and
operably attaching the proximal end of the plurality of elongate members to the detachment feature of the pusher mechanism of the delivery device.
18 . The method of claim 17 , wherein one or more of the plurality of coiled members is helical in shape.
19 . The method of claim 17 , wherein two or more of the plurality of coiled members have varying diameters.
20 . The method of claim 17 , wherein each of the plurality of coiled members has at least two zones of shape memory polymer material with different material properties selected from the group consisting of modulus and glass transition temperature (Tg).
21 . A method of manufacturing a shape memory coiling device for occluding a vascular target comprising
providing a delivery device having a pusher mechanism with a detachment feature;
providing a shape memory polymer material;
forming a plurality of coiled members from the shape memory polymer material in a formation state;
constraining the plurality of coiled members in a pre-deployed state as a plurality of elongate members, each of the plurality of elongate members having a proximal end and a distal end;
connecting the proximal ends of each of the plurality of elongate members together, and;
operably attaching the proximal ends of the plurality of elongate members to the detachment feature of the pusher mechanism of the delivery device.
22 . The method of claim 21 , wherein one or more of the plurality of coiled members is helical in shape.
23 . The method of claim 21 , wherein two or more of the plurality of coiled members have varying diameters.