Patent ID: 7717935

Claim:
A medical device, comprising: a guidewire having a proximal region and a distal region; an actuatable stop positioned along the guidewire within the distal region, the actuatable stop actuatable between a traversable state and an untraversable state; a filter with proximal and distal ends, the filter slidably disposed over the guidewire between a first position in which the filter lies entirely proximal of the actuatable stop and a second position wholly within the distal region and distal of the actuatable stop, wherein the filter proximal end cannot pass proximally over the actuatable stop when the actuatable stop is in the untraversable state and the filter proximal end can pass proximally over the actuatable stop when the actuatable stop is in the traversable state; and an actuator that interacts with the actuatable stop to actuate the actuatable stop between the traversable and untraversable states.