Vascular and bodily duct treatment devices and methods

摘要

Devices including, but not limited to, a self-expandable member having a proximal end portion and a main body portion. The self-expandable member is movable from a first delivery position to a second placement position, in the first delivery position the expandable member being in an unexpanded position and having a nominal first diameter and in the second position the expandable member being in a radially expanded position and having a second nominal diameter greater than the first nominal diameter for deployment within a vessel or duct of a patient. The expandable member includes a plurality of cell structures with the cell structures in the main body portion extending circumferentially around a longitudinal axis of the expandable member and the cell structures in the proximal end portion extending less than circumferentially around the longitudinal axis of the expandable member.

主权项

1. An embolic obstruction retrieval device comprising; an elongate self-expandable member having a radially expanded configuration and a radially unexpanded configuration, the self-expandable member comprising a plurality of generally longitudinal undulating elements with adjacent undulating elements being interconnected in a manner to form a plurality of diagonally disposed cell structures, the self-expandable member having a proximal end portion and an elongate cylindrical main body portion comprising a proximal section and a distal section, the cell structures in the elongate cylindrical main body portion extending circumferentially around a longitudinal axis of the self-expandable member, the cell structures in the proximal end portion extending less than circumferentially around the longitudinal axis of the self-expandable member, in the expanded configuration the distal section of the elongate cylindrical main body portion having an average diameter greater than the average diameter of the proximal section of the elongate cylindrical main body portion, the retrieval device having a proximal antenna extending proximally from a proximal-most end of the proximal end portion of the self-expandable member; wherein the cell structures in the distal section of the elongate cylindrical main body portion comprise a proximal-most apex and a distal-most apex, at least some of the cell structures in the distal section of the elongate cylindrical main body portion comprising an intermediate strut that extends between the proximal-most and distal-most apices, the at least some of the cell structures in the distal section of the elongate cylindrical main body portion comprise a first strut that extends between the proximal-most and distal-most apices to form a bottom side of the cell structure and a second strut circumferentially spaced-apart from the first strut that extends between the proximal-most and distal-most apices to form a top side of the cell structure, the width of the intermediate strut being less than the width of each of the first and second struts.