A thrombus filter configured for placement in within a blood vessel lumen defined by a blood vessel wall. Methods and devices for selectively removing the thrombus filter when the presence of a filter in the vascular system is no longer desired. The thrombus filter includes a first strand formation,...http://www.google.es/patents/US6251122?utm_source=gb-gplus-sharePatente US6251122 - Intravascular filter retrieval device and method
