Device and method for treating vascular occlusion
A system and method for managing an occlusion, such as a blood clot, within a lumen or passageway of a patient. More particularly, a system and method for rapidly restoring blood flow through an occlusion including a self-expanding, tubular member through which blood may flow when in an expanded state. The tubular member has a structure configured to engage the occlusive material, thereby allowing for extraction of at least a portion of the occlusive material. The system may further employ a material extraction member that is deployed distally of the tubular member.
1. A system for treating occlusive material in a blood vessel, comprising:
a pusher defining a lumen;
an elongated member positioned within the lumen, wherein the elongated member is transposable within the lumen independently of the pusher;
an expandable tubular structure having a distal portion and a proximal portion, wherein the proximal portion is attached to the pusher, wherein the expandable tubular structure is porous and has an elongate shape, and wherein the expandable tubular structure is configured to engage the occlusive material; and
an expandable capture member configured to capture a portion of the occlusive material, the expandable capture member including:
a first end portion;
a second end portion coupled to the elongated member;
an everted portion extending proximally past at least the distal portion of the expandable tubular structure, wherein proximal retraction of the elongated member relative to the pusher forms the everted portion of the expandable capture member; and
a non-everted portion.
2. The occlusion management system of claim 1 wherein the expandable tubular structure is formed from a porous mesh or scaffold.
3. The occlusion management system of claim 1 wherein the expandable capture member is a braided structure.
4. The occlusion management system of claim 1 wherein the expandable capture member is self-expanding.
5. The occlusion management system of claim 1 wherein the expandable capture member is expandable independently of expansion of the expandable tubular structure.
6. The occlusion management system of claim 1 wherein the lumen is a first lumen, and further comprising a catheter defining a second lumen, wherein the pusher is positioned within the second lumen, and wherein the pusher is an elongated shaft that is transposable within the second lumen independently of the catheter.
7. The occlusion management system of claim 1 wherein the lumen is a first lumen, and further comprising a catheter defining a second lumen, wherein the pusher is positioned within the second lumen, and wherein the expandable tubular structure is configured to be contained within the second lumen of the catheter in a compressed state and to self-expand to an expanded state when deployed from the catheter.
8. The occlusion management system of claim 1 wherein the expandable tubular structure includes a distal end defining a distal opening when the expandable tubular structure is expanded, and wherein the distal end has a substantially circular cross-sectional shape.