An apparatus and method of use are provided, the apparatus comprising: (a) a filter； and (b) a frame having a first end and a second end, the frame comprising the first end and a second end. A first support portion and a second support portion extending between the end portions, wherein at least the first support portion and the second support portion of the frame are connected to at least a part of the periphery of the filter, and the frame And the filter together defines a lumen, the frame has a shape memory, and the lumen has a first position where the lumen has a first diameter and a second position where the lumen has a second diameter. The first aperture is smaller than the second aperture. [Selection] Figure 11装置及び使用方法が提供され、当該装置が、（ａ）フィルタと、（ｂ）第１端部及び第２端部を有するフレームと、を含み、当該フレームが、当該第１端部と第２端部との間を延在する第１支持部及び第２支持部を含み、当該フレームの少なくとも第１支持部及び第２支持部が、当該フィルタの周辺の少なくとも一部に連結され、当該フレーム及び当該フィルタが一緒になってルーメンを規定し、当該フレームが、形状記憶を有し、当該ルーメンが第１口径を有する第１位置と、当該ルーメンが第２口径を有する第２位置との間で移動可能であり、第１口径が第２口径よりも小さい。【選択図】図１１
