| 摘要 |
A removable percutaneous vascular filter system for blocking emboli in a vessel while allowing continued perfusion of blood comprises a guidewire (160) having distal (162) and proximal (174) ends and a filter (170). The filter comprises (a) a non-metallic, porous, filter membrane having a distal (172) portion and a proximal free end portion (174), wherein the pore size of the porous filter membrane is in the range of from about 20 to about 300 mu m, and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to the flexible filter membrane proximal portion, wherein said filter membrane distal portion is pivotally attached to the guidewire near said distal end of the guidewire and wherein the filter membrane proximal free end portion is substantially parallel to the guidewire in its collapsed state. A deployment device (180) connected to the filter can be used to cause the filter membrane proximal free end portion to move from a position substantially parallel to the guidewire to a position removed from the longitudinal axis of the guidewire to cause the flexible filter member to form a substantially conical shape, and to form a generally sealing relationship with the wall of said vessel.
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