A releasable and retrievable vascular filter system comprising a filter, a porous
filter membrane attached to the filter, and an anti-migration feature for causing
the filter to remain substantially stationary in the lumen of the vessel during
the clinical procedure. The releasable and retrievable vascular filter system minimizes
or substantially eliminates filter movement during the procedure, which may result
in damage to the lumen, and/or the release of embolic particulates captured within
the filter. The releasable and retrievable vascular filter system also allows for
guidewire exchanges, which may be necessary for successful completion of the clinical procedure.