A filter device is adapted to function as a guidewire, an exchange guidewire, and provide embolic protection during a procedure. The filter device includes a filter assembly that is either integral with or coupled to a guide member. The filter assembly includes a plurality of struts that expand outwardly...http://www.google.se/patents/US20050283185?utm_source=gb-gplus-sharePatent US20050283185 - Methods, systems, and devices for providing embolic protection
