FILTER DEVICE

摘要

A filter device has a catheter having a lumen, a shaft extended in the longitudinal direction from the lumen, and a filter capturing an embolus. The filter is connected to the shaft through a slide ring at the distal end thereof. The shaft is inserted into and passed through the ring. The ring is rotatable with respect to the shaft and slidable in the longitudinal direction. When the filter is expanded in a blood vessel, the ring slides on the shaft. The filter is connected to the shaft through another ring on the peripheral edge of an opening. The shaft is inserted into and passed through the ring. The ring is rotatable with respect to the shaft. The ring is held between a pair of stoppers fixed onto the shaft. Therefore, the movement of the ring in the longitudinal direction with respect to the shaft is prevented.

主权项

1. A filter device comprising:
a catheter having a housing space inside; a wire material extended along a longitudinal direction of the catheter in the housing space of the catheter; a filter capable of changing a state between an expanded state in which the filter is exposed to a distal end side of the catheter to be expanded to an outer side relative to an outer shape of the catheter and a contracted state in which the filter is elastically contracted from the expanded state so as to be housed in the housing space; a slider which is provided on the distal end side of the filter, rotatable about the wire material as an axis, and movable along the wire material; and a proximal end side fixing portion which is provided on a proximal end side of the filter, rotatable about the wire material as the axis, and prevented from moving in the longitudinal direction with respect to the wire material.