CPC A61F 2/013 (2013.01) [A61B 17/00234 (2013.01); A61B 90/39 (2016.02); A61M 25/0041 (2013.01); A61B 17/221 (2013.01); A61B 2017/00867 (2013.01); A61B 2017/2215 (2013.01); A61B 2017/2217 (2013.01); A61B 2090/3966 (2016.02); A61F 2210/0014 (2013.01)] | 27 Claims |
1. An embolic protection device comprising:
a catheter having a proximal end, a distal end, and a lumen extending from the proximal end to the distal end along a longitudinal axis of the catheter, wherein the lumen is configured to house a guidewire, and a distal portion of the catheter that assumes a generally arcuate shape being at least a semi-circle when the guidewire is at least partially longitudinally retracted;
a self-expanding embolic filter that is disposed around the catheter, proximal to the distal portion, wherein the embolic filter comprises a frame defining an opening of the embolic filter; wherein the frame includes:
a fixed portion coupled to the catheter, proximal to the distal portion, wherein the fixed portion does not move in a longitudinal direction; and
a movable portion continuous with the fixed portion of the frame;
a deployment mechanism that is disposed around at least a portion of the catheter, wherein the deployment mechanism is longitudinally movable with respect to the catheter, the deployment mechanism is configured to contain the embolic filter in a collapsed configuration, and the embolic filter is configured to self-expand upon longitudinal retraction of the deployment mechanism;
a wire coupled to the movable portion of the frame of the embolic filter, wherein the wire is longitudinally movable with respect to the catheter and the movable portion is urged by the wire;
when the wire is longitudinally advanced, in a distal direction, to a first position, the wire urges the movable portion of the frame, in a longitudinal direction, towards the distal end of the catheter to bend the frame longitudinally towards the distal end of the catheter and laterally outward from the catheter, such that the opening of the embolic filter generally faces the distal end of the catheter and expands to a first diameter; and
when the wire is longitudinally advanced, in a distal direction, to a second position distally farther than the first position, the wire urges the movable portion of the frame radially outward from the catheter, and extends the frame such that the opening of the embolic filter expands to a second diameter larger than the first diameter.
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