Patent ID: 7727270
Filing Date: 2010-06-01
Classification: A61F

Abstract:
1. An expandable and retrievable stent comprising: an inner strut with an inner strut proximal end portion and an inner strut distal end portion; a distal anchor secured to the inner strut distal end portion; a plurality of distal arms operably attached to the distal anchor; a first traveling anchor movably attached to the inner strut, wherein the first traveling anchor is located between the inner strut proximal end portion and the inner strut distal end portion; a plurality of proximal arms operably attached to the traveling anchor; and a plurality of outer struts, wherein each outer strut extends between and is operably attached to one proximal arm at a proximal attachment and one distal arm at a distal attachment; wherein said stent has three configurations, namely: a first compressed state, wherein the distal arms are pivoted distally away from the distal anchor, the proximal arms are pivoted distally away from the traveling anchor and the traveling anchor is in a first position; an expanded state, wherein the distal arms and the proximal arms are substantially perpendicular to the inner strut and the traveling anchor is in a second position; and a second compressed state, wherein the distal arms are pivoted proximally away from the distal anchor, the proximal arms are pivoted proximally away from the traveling anchor and the traveling anchor is in a third position; wherein the second position is between the first position and the third position; and wherein at least one of the distal anchor and the first traveling anchor is disposed on the inner strut within an area surrounded by the outer struts when said stent is in the first compressed state and outside the area surrounded by the outer struts when said stent is in the second compressed state.