FÜHRUNGSDRAHT FÜR TEMPORÄREN BLUTFILTER

A vascular filter guide wire is disclosed for directing precision placement of a catheter proximate a blood vessel lesion and filtering particulate matter dislodged by treatment of the vessel. The guide wire includes an actuating mechanism, an elongated flexible core wire having a proximal end mounted to the actuating mechanism and a distal end for insertion through a vasculature to a position downstream of the restriction. A tubular flexible shaft is slidably disposed telescopically along the core wire and includes a proximal portion affixed to the actuating mechanism in movable relation to the core wire. The guide wire includes a collapsible filter at its proximal end to the distal portion of the shaft and, at its distal end, to the core wire. The filter deploys radially in response to axial movement of the core wire relative to the shaft so that it can trap particulate matter arising from treatment of the lesion.