Devices and methods for vascular recanalization
In some embodiments, a medical device for recanalizing a vessel having a blockage and restoring blood flow through an obstructed blood vessel includes an expandable member coupled to a core wire and a hypotube that are movable relative to each other to manipulate the expandable member between various configurations. The expandable member having a capture structure in an expanded configuration. The expandable member can include multiple interstices formed by woven mesh filaments or braided strands through which the material blocking the vessel can pass. The capture structure can include a shape on its external surface that facilitates dislodgement and capture of the material within capture spaces created by the expandable member. Some embodiments include a capture sack or cap for capturing material and preventing material from migrating down stream of the blockage. Superoxygenated blood can be infused distal to the blockage to minimize loss of function during an ischemic event.
1. An apparatus, comprising:
an elongate member; and
a self-expanding braided expandable member defining a plurality of openings and coupled to the elongate member, the self-expanding braided expandable member configured to move from a collapsed configuration to an expanded configuration when unconstrained;
the self-expanding braided expandable member configured to be inserted into a blood vessel in the collapsed configuration and move to the expanded configuration when unconstrained within the blood vessel,
the self-expanding braided expandable member when in the expanded configuration defining an interior volume and configured to receive therein at least a portion of a bodily tissue,
the self-expanding braided expandable member being movable from the expanded configuration to a helical configuration while disposed within the blood vessel such that only the expandable member has the helical configuration and a capture region is defined between at least a first portion of the self-expanding braided expandable member and a second portion of the self-expanding braided expandable member wherein the self-expanding braided expandable member is moved to the helical configuration by rotating the elongate member.
2. The apparatus of claim 1 , wherein the first portion of the expandable member is configured to contact a wall of the blood vessel in the expanded configuration.
3. The apparatus of claim 1 , wherein the first portion of the expandable member and at least a portion of the second portion of the expandable member move from the collapsed configuration to the expanded configuration simultaneously.
4. The apparatus of claim 1 , wherein the elongate member is substantially linear when the self-expanding braided expandable member is in the collapsed configuration, the expanded configuration and the helical configuration.