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.