Abstract: Provided is a medical device capable of easily changing a position of the device inside a biological lumen and effectively removing a cut object. The medical device for removing the object in the biological lumen has a drive shaft, a cutting portion, a first housing that accommodates the drive shaft to be rotatable, a second housing that is rotatable with respect to the first housing, and a support portion that supports the first housing and the second housing. The second housing and the support portion relatively move along an axis to restrict relative rotation of the first housing and the second housing. The support portion supports the second housing to be rotatable around the axis.

Abstract: Provided is a medical device capable of easily changing a position of the device inside a biological lumen and effectively removing a cut object. The medical device for removing the object in the biological lumen has a drive shaft, a cutting portion, a first housing that accommodates the drive shaft to be rotatable, a second housing that is rotatable with respect to the first housing, and a support portion that supports the first housing and the second housing. The second housing and the support portion relatively move along an axis to restrict relative rotation of the first housing and the second housing. The support portion supports the second housing to be rotatable around the axis, and restricts a relative movement and a relative inclination of the second housing and the support portion in a direction intersecting with the axis.

Abstract: A medical device for removing an object in a body lumen includes a catheter and a drive device. The drive device includes a hub support portion with which a hub portion of the catheter is interlocked. The hub portion has first and second engagement portions interlocked with the hub support portion. The hub support portion includes a rotation blocking portion that is engaged with the first engagement portion to block the hub portion from rotating with respect to the hub support portion, a movement blocking portion that is engaged with the second engagement portion to block movement of the hub portion with respect to the hub support portion in an axial direction, and a releasing portion that releases a state in which a rotation of the hub portion is blocked while maintaining a state in which movement of the hub portion is blocked.

Abstract: A medical device capable of adjusting, while a rotating expandable portion breaks an object, a breaking force of the expandable portion. The medical device for breaking a thrombus in a blood vessel includes a shaft portion, an expandable portion that is provided to the shaft portion, a fixing portion that fixes the expandable portion and the shaft portion, a slide portion that is fixed to the expandable portion and is slidable with the shaft portion, and an outer tube that houses therein the shaft portion, in which the slide portion is movable by being indirectly pressed by the outer tube, and the slide portion is relatively rotatable relative to the outer tube.

Abstract: A medical device capable of adjusting, while a rotating expandable portion breaks an object, a breaking force of the expandable portion. The medical device for breaking a thrombus in a blood vessel includes a shaft portion, an expandable portion that is provided to the shaft portion, a fixing portion that fixes the expandable portion and the shaft portion, a slide portion that is fixed to the expandable portion and is slidable with the shaft portion, and an outer tube that houses therein the shaft portion, in which the slide portion is movable by being indirectly pressed by the outer tube, and the slide portion is relatively rotatable relative to the outer tube.

Abstract: Provided is a medical device capable of easily changing a position of the device inside a biological lumen and effectively removing a cut object. The medical device for removing the object in the biological lumen has a drive shaft, a cutting portion, a first housing that accommodates the drive shaft to be rotatable, a second housing that is rotatable with respect to the first housing, and a support portion that supports the first housing and the second housing. The second housing and the support portion relatively move along an axis to restrict relative rotation of the first housing and the second housing. The support portion supports the second housing to be rotatable around the axis, and restricts a relative movement and a relative inclination of the second housing and the support portion in a direction intersecting with the axis.

Abstract: A medical device for removing an object in a body lumen includes a catheter and a drive device. The drive device includes a hub support portion with which a hub portion of the catheter is interlocked. The hub portion has first and second engagement portions interlocked with the hub support portion. The hub support portion includes a rotation blocking portion that is engaged with the first engagement portion to block the hub portion from rotating with respect to the hub support portion, a movement blocking portion that is engaged with the second engagement portion to block movement of the hub portion with respect to the hub support portion in an axial direction, and a releasing portion that releases a state in which a rotation of the hub portion is blocked while maintaining a state in which movement of the hub portion is blocked.