Removable intravascular devices and methods of making and using the same
View Patent ↗An intravascular device, which may be a filter, that may include a plurality of elongate members, each or several of the elongate members may have one or more inwardly facing edges disposed at and near the part of the intravascular device configured to contact the vessel wall for cutting through the intima or other encapsulating tissue, each of the elongate member may also include an anchoring member or other desired components.
1. An intravascular filter having a central longitudinal axis comprising:
an elongate member;
an anchoring member for anchoring the intravascular filter to a vessel wall attached to a distal end of the elongate member; and
an elongate edged blade cutting member disposed along the elongate member proximate the anchoring member, wherein the edge of the edged blade generally faces towards the longitudinal central axis;
wherein a distal end of the elongate edged blade terminates proximally of the anchoring member.
2. The filter of claim 1 , wherein the elongate member comprises a first elongate section having a first end and a second end,
wherein the second end is proximate the anchoring member, and
wherein the cutting member extends from the first end to the second end.
3. The filter of claim 2 , wherein when the filter is placed within a body vessel having a vessel wall, the filter is configured so that the anchoring member contacts the vessel wall and the first end of the first elongate section is spaced apart from the vessel wall.
4. The filter of claim 2 , wherein the first elongate section and the cutting member have a first cross section,
wherein the elongate member further comprises a second elongate section having a second cross section, the second elongate section located proximate the first end of the first elongate member, and
wherein the first cross section has an outer extent no greater than an outer extent of the second cross section.
5. The filter of claim 2 , wherein the cutting member comprises a single edge extending from the first end to the second end.
6. The filter of claim 2 , wherein the cutting member comprises a first edge extending from the first end and a second edge extending from the second end.
7. The filter of claim 6 , wherein the first edge and the second edge are substantially aligned.
8. The filter of claim 7 , wherein the first edge is spaced apart from the second edge.
9. The filter of claim 8 , wherein the cutting member further comprises a third edge disposed between and aligned with the first and second edges, the third edge spaced apart from the first and second edges.
10. The filter of claim 8 , wherein the space between the first and second edges is wedge shaped.
11. The filter of claim 8 , wherein the space between the first and second edges is block shaped.
12. The filter of claim 8 , wherein the space between the first and second edges is u-shaped.
13. The filter of claim 1 , wherein the anchoring member comprises an inwardly facing cutting member.
14. The filter of claim 1 , wherein the filter is a vena cava filter.
15. The filter of claim 1 , wherein the elongate member comprises metal.
16. The filter of claim 15 , wherein the elongate member comprises stainless steel.
17. The filter of claim 15 , wherein the elongate member comprises a nickel-titanium alloy.
18. The filter of claim 17 , wherein the nickel-titanium alloy is Nitinol.
19. The filter of claim 1 , further comprising a second elongate member having a second cutting member facing generally towards the longitudinal central axis of the filter.
20. The filter of claim 19 , further comprising a third elongate member having a third cutting member facing generally towards the longitudinal central axis of the filter.
21. The filter of claim 1 , further comprising a filtering portion for retaining emboli, the filtering portion including the elongate member.