Filter with positioning and retrieval devices and methods
View Patent ↗An intravascular filter having centering capabilities and a device for manipulation of the filter within a vessel. The manipulation device includes a grasping member disposed at the distal end of an elongate shaft, wherein the grasping member may be used to engage a portion of the filter.
1. An intravascular filter placement system comprising:
a filter having a tip and a plurality of legs extending radially outward from the tip, and
a filter manipulation device including an outer elongate member having a proximal end, a distal end and a lumen extending therethrough and an inner elongate member disposed in at least a portion of the lumen having a proximal end and a distal end,
wherein the inner elongate member includes a first expandable generally tubular hollow grasping member for grasping the filter during a filter manipulation process, and a second expandable generally tubular hollow grasping member for grasping the tip during a filter manipulation process, each of the first and second expandable members being disposed about the distal end of the inner elongate member, generally concentric therewith, and extending distally therefrom.
2. The intravascular filter placement system of claim 1 , wherein the first expandable member is biased in an expanded position.
3. The intravascular filter placement system of claim 2 , wherein the first expandable member is a braided member.
4. The intravascular filter placement system of claim 3 , wherein the braided member is conical shaped.
5. The intravascular filter placement system of claim 1 , wherein the first or second expandable member is an enlarged diameter portion of the inner elongate member.
6. The intravascular filter placement system of claim 1 , wherein the outer elongate member includes a means for centering the outer elongate member in a vessel.
7. The intravascular filter placement system of claim 6 wherein the means for centering the outer elongate member is an inflatable balloon.
8. The intravascular filter placement system of claim 7 , wherein the inflatable balloon includes a plurality of lobes.
9. The intravascular filter placement system of claim 6 , wherein the means for centering the outer elongate member includes a plurality of wires including a shape memory alloy.
10. The filter manipulation device of claim 3 , wherein the inner elongate member is a core wire.
11. The filter manipulation device of claim 10 , further comprising a sleeve disposed at the distal end of the core wire, the sleeve securing the braided member to the core wire.
12. The filter manipulation device of claim 11 , wherein the sleeve is a hypotube.
13. The filter manipulation device of claim 10 , further comprising a means for centering the elongate shaft within a vessel.
14. The filter manipulation device of claim 13 , wherein the means for centering the elongate shaft is an inflatable member.
15. The filter manipulation device of claim 14 , wherein the inflatable member has a plurality of lobes.
16. The filter manipulation device of claim 13 , wherein the means for centering the elongate shaft is a plurality of wires.
17. The filter manipulation device of claim 16 , wherein the plurality of wires include a shape memory alloy.
18. The intravascular filter placement system of claim 1 , wherein the second expandable member is biased in an expanded position.
19. The intravascular filter placement system of claim 18 , wherein the second expandable member is a braided member.
20. The intravascular filter placement system of claim 3 , wherein the second expandable member is a braided member.
21. The filter manipulation device of claim 20 , wherein the second braided member is disposed within a portion of the first braided member and secured to the inner elongate member by a hypotube.
22. The filter manipulation device of claim 1 , wherein the second expandable member is disposed within a portion of the first expandable member and secured to the inner elongate member.