RETRIEVABLE ENDOLUMINAL FILTER

摘要

In one embodiment of the present invention there is provided a filter having a first structural member extending along and clockwise about an axis, a second structural member extending along and counter clockwise about the axis and a material capture structure extending between the first and the second structural members and across the axis. Ih yet another embodiment, there is provided a filter having a first spiral shaped support member having an end; a second support member positioned to cross the first spiral support member and form a loop between the end and the place where the second support member crosses the first spiral support member; and a material capture structure extending across and secured to the loop. In one embodiment of the present invention there is provided a coated endoluminal filter having a support structure; a filtering structure attached to the support structure; a coating over at least a portion of support structure. In another alternative embodiment, there is provided an endoluminal filter having a support structure; and a filtering structure attached to the support structure; wherein, the support structure is generally symmetrical about a plane that is orthogonal to the flow direction of the filter and contains a crossover point between two structural elements of the support structure. In another alternative embodiment, there is provided an endoluminal filter, having a support structure; and a filtering structure attached to the support structure; wherein, the support structure is generally symmetrical about a plane that is parallel to the flow direction of the filter and contains both ends of the support structure.