Patent ID: 9308104
Filing Date: 2016-04-12
CPC Classification: A61F

Claim Text:
1. A stent removal device for removing or repositioning a stent within a lumen, the stent comprising an element arranged circumferentially about an entire circumference of the stent to produce a purse-string effect to reduce a diameter of the stent when the element is pulled in a proximal direction, the stent removal device comprising: a tube having an elongate cylindrical body with a proximal end and a distal end configured to be positioned within the lumen proximate to the stent, wherein the tube is configured to receive at least a portion of the stent therein; a pusher having a longitudinal portion and a gripping member, the longitudinal portion of the pusher configured to be positioned within and extend through a channel of the tube and the gripping member coupled to a distal end of the longitudinal portion of the pusher and configured to extend laterally and distally on both an inner side and an outer side of an edge of the stent to engage and restrain the edge of the stent, wherein the longitudinal portion is sufficiently rigid to restrain proximal movement of the stent while the pusher applies a force distally; wherein the pusher is configured to be positioned through the stent while the tube is positioned proximal of the stent; and a hook having a single unbranched longitudinal portion and a hook member, the single unbranched longitudinal portion of the hook configured to be positioned within and extend through the channel of the tube alongside the longitudinal portion of the pusher, the hook member coupled to a distal end of the single unbranched longitudinal portion of the hook and configured to engage the element such that a force in the proximal direction applied to the hook causes the stent to purse string, the hook member including a ridge that extends proximally to secure the element to prevent the element from disengaging from the hook member during application of the force in the proximal direction, wherein the pusher and hook are independently operable and the pusher is configured to, during operation, engage the edge of the stent either proximal or distal to the hook as the hook engages the element of the stent.