A filter device for temporary placement of a filter in an artery or vein
is disclosed. The devices include (1) an elongate tubular member having a
single or double side-wire loop, (2) an elongate member having a filter
bonded to a circular rim joined by a plurality of tethers and an
independently moveable tether, and (3) an elongate member having a
parachute filter joined by a plurality of flexible struts. The filter
conforms to the interior of a vessel wall when expanded and contracts to
a consistent diameter without bunching when stowed. The filter devices
may act as guidewires for guiding a therapeutic catheter to a region of
interest within a vessel. Methods of using the filter device to entrap
and remove embolic material from a vessel during endovascular procedures
are also disclosed.