Method and apparatus for capturing objects beyond an operative site in medical procedures

摘要

A device (2) for capturing and removing one or more particles (58) from a body 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 guide 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 movement 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 outside containment collar (32) where mouth (14) of sack (12) is biased open by collapsible flame (8). Containment collar (32) has an axial length configured 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 it 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from guide wire (4) by pulling pull wire (34) relative to guide wire (4) sufficiently that containment collar (32) is withdrawn from the body and from the end of guide wire (4) opposite collapsible frame (8).