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Method and assembly for distal embolic protection

  • US 9,144,485 B2
  • Filed: 04/11/2013
  • Issued: 09/29/2015
  • Est. Priority Date: 10/06/2003
  • Status: Active Grant
First Claim
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1. An embolic protection assembly for introduction into a blood vessel, the assembly comprising:

  • a sleeve having a lumen with a groove;

    an actuator having proximal and distal ends, wherein the actuator is movably disposed;

    a filter assembly coupled to the actuator, the filter assembly comprising;

    a porous bag having an open proximal end;

    a collapsible and expandable frame made of a shape memory alloy coupled to the open proximal end of the bag;

    the frame comprising a proximal end, a distal end, and a projection protruding in a radial direction;

    the distal end of the frame being coupled to and supporting the open proximal end of the porous bag; and

    longitudinal arms joining the proximal end of the frame and the distal end of the frame, the longitudinal arms being biased to expand radially;

    wherein the actuator is configured to be moved in a first direction to compress and retract the frame within the lumen of the sleeve,wherein the actuator is configured to be moved in a second direction to expand the distal end of the frame to an expanded state,wherein the sleeve and filter assembly are configured such that the proximal end of the frame remains within the lumen when the distal end of the frame is expanded at the expanded state, andwherein the projection is adapted to mate with the groove when the frame is expanded at the expanded state.

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