Retrieval system
A system for retrieving material or objects from a biological vessel is provided. the system includes an elongated braid structure configured for transitioning between collapsed and expanded states, the elongated braid structure surrounding a lumen having a distal opening when in the expanded state. The system further includes a closure wire positioned along a length of the elongated braid structure, the closure wire being actuatable to pull inward a distal portion of the elongated braid structure and thereby at least partially close the distal opening.
1 . A system for retrieving material or objects from a biological vessel comprising an elongated braid structure that:
includes a set of wires that includes a plurality of helically wound wires crossing a plurality of counter-helically wound wires to define a wall surrounding a lumen, the lumen having a distal opening at a distal end of said elongated braid structure;
is configured for transitioning between collapsed and expanded states; and
is coated internally with a cover such that a suctioning force can be applied to the distal opening when said elongated braid structure is in said expanded state,
wherein:
the system comprises an other wire arranged along the braided structure and back along the braided structure alongside itself in a double spiral configuration; and
the distal end of said elongated braid structure forms a plurality of wire loops that are formed from wires of the set and that are angled outwardly with respect to the wall.
2 . The system of claim 1 , wherein said other wire is trapped between said elongated braid structure and said cover.
3 . The system of claim 1 , wherein said plurality of wire loops cross each other.
4 . The system of claim 1 , wherein the double spiral configuration is a corkscrew-style configuration along the braid.
5 . The system of claim 1 , wherein the other wire is positioned along the elongated braid structure such that bending of the elongated braid structure along a longitudinal axis thereof does not pull the distal opening radially inwards.
6 . The system of claim 1 , wherein the other wire is trapped within the elongated braid structure.
7 . The system of claim 1 , wherein said other wire is embedded within said cover.
8 . The system of claim 1 , wherein the other wire defines a first portion and a second portion, the first portion and the second portion extending helically, in parallel with each other, along the elongated braid structure to form the double spiral configuration.
9 . The system of claim 1 , further comprising a catheter attached to said elongated braid structure.
10 . The system of claim 9 , wherein said catheter includes an aspiration conduit for applying said suctioning force to said distal opening of said lumen.
11 . The system of claim 1 , wherein, for each wire of the set of wires, a diameter of the wire is 0.025-0.1 mm.
12 . The system of claim 11 , wherein a diameter of the other wire is 0.02-0.25 mm.
13 . The system of claim 1 , wherein the other wire is a closure wire for at least partially closing said distal opening of said lumen.
14 . The system of claim 13 , wherein said distal end portion of said elongated braid structure includes eyelets and further wherein said closure wire runs through at least some of said eyelets.
15 . The system of claim 14 , wherein
a plane of said eyelets is different from a plane of said plurality of wire loops.
16 . An elongated braid structure for retrieving material or objects from a biological vessel, the elongated braid structure:
comprising:
a set of wires that includes a plurality of helically wound wires crossing a plurality of counter-helically wound wires to define a wall surrounding a lumen, the lumen having a distal opening at a distal end of the elongated braid structure; and
an other wire arranged along the wall and back along the wall alongside itself in a double spiral configuration;
being configured for transitioning between a collapsed state and an expanded state;
defining, at the distal end of said elongated braid structure, a plurality of wire loops that are formed from wires of the set and that are angled outwardly with respect to the wall; and
being coated with a cover such that a suctioning force can be applied to the distal opening when said elongated braid structure is in the expanded state.
17 . The system of claim 16 , wherein said plurality of wire loops cross each other.
18 . The system of claim 16 , wherein the other wire defines a first portion and a second portion, the first portion and the second portion extending helically, in parallel with each other, along the elongated braid structure to form the double spiral configuration.
19 . The system of claim 16 , wherein, for each wire of the set of wires, a diameter of the wire is 0.025-0.1 mm.
20 . The system of claim 19 , wherein a diameter of the other wire is 0.02-0.25 mm.