Method and apparatus for capturing objects beyond an operative site utilizing a capture device delivered on medical guide wire

摘要

A device (2) for capturing and removing one or more particles (58) from a bo dy canal or vessel includes a sack (12) having a mouth (14) and a closed bottom (16) opposite mouth (14). A guide wire (4) is received through mouth (14) of sack (12) and is connected to closed bottom (16) of sack (12). A collapsible frame (8) is connected between guide wire (4) and mouth (14) of sack (12), with collapsible frame (8) biasing mouth (14) of sack (12) opened around gui de wire (4). A containment collar (32) slidably receives guide wire (4), collapsible frame (8), and at least part of sack (12) therein. A pull wire (34) is connected to containment collar (32). In response to relative moveme nt between guide wire (4) and pull wire (34), collapsible frame (8) moves from inside containment collar (32) where mouth (14) of sack (12) is closed and ouside containment collar (32) where mouth (14) of sack (12) is biased open by collapsible frame (8). Containment collar (32) has an axial length configure d to be positioned entirely in a body and pull wire (34) has an axial length configured to extend from outside the body to containment collar (32) when i t is positioned entirely in the body. Containment collar (32) can be removed from guide wire (4) by pulling pull wire (34) relative to guide wire (4) sufficientlythat containment collar (32) is withdrawn from the body and from the end of guide wire (4) opposite collapsible frame (8).