Intravascular filter system

The intravascular filter system which can be removed catches embolism and the other qualities of a solid in relation with intravascular medical aid, such as stent placement and a catheter balloon. A system contains the operation wire which can move in the inside of a guide wire in order to operate a hollow guide wire and filter membrane. Including the filter composition made by the closed state and the state where it opened, through a patient's artery, the embodiment of a filter system is advanced easily and can be developed. Optionally, an operation wire can be removed and can insert a substitute wire into a hollow guide wire. The control mechanism can help for an operator to restrict a motion of an operation wire for filter membrane, deployment and/or while folding. Recommendation filter membrane is constituted so that both of embolism capture may be made a blood flow to the utmost.