Device support, medical device, and treatment method
A device support insertable into a sheath, the device support supporting a medical device including a rotatable drive shaft extending from a distal end to a proximal end, and an operation unit that accommodates a drive source connected to the drive shaft, the device support including a plurality of tubular bodies that accommodates the drive shaft and an outer tube, in which a first tubular body disposed on a most proximal end side among the plurality of tubular bodies has a proximal end connection portion connectable to the operation unit at a proximal end portion of the first tubular body, and the plurality of tubular bodies includes at least a second tubular body and a third tubular body having an outer diameter smaller than an inner diameter of the second tubular body, and the second tubular body and the third tubular body are movable relative to one another.
1 . A treatment method comprising:
conveying a wire device including a wire through a guiding catheter to a target position of a blood vessel;
conveying a rotatable drive shaft in which a lumen through which the wire passes and an expansion portion connected to a distal end portion of the drive shaft to the target position of the blood vessel through the guiding catheter;
connecting a hub movable in an axial direction together with the drive shaft while rotatably holding the drive shaft and the guiding catheter to a portable operation unit including a drive source that rotates the drive shaft; and
integrally moving the drive shaft, the expansion portion, the guiding catheter, and the operation unit in the axial direction to crush an object in the blood vessel by the expansion portion.
2 . The treatment method according to claim 1 , further comprising:
disconnecting the hub and the guiding catheter from the operation unit after the object in the blood vessel is crushed by the expansion portion.
3 . The treatment method according to claim 2 , further comprising:
suctioning, by the guiding catheter, the object in the blood vessel crushed by the expansion portion after disconnecting the hub and the guiding catheter from the operation unit.
4 . The treatment method according to claim 1 , further comprising:
inserting the guiding catheter into a proximal end through-hole of a proximal end connection portion of a device support;
passing the guiding catheter through the proximal end through-hole of the device support, an expandable portion of the device support, and a distal end through-hole of the device support;
connecting the guiding catheter to a proximal end connection portion of the expandable portion of the device support; and
expanding or contracting the expandable portion of the device support in an axial direction.
5 . The treatment method according to claim 4 , wherein the expandable portion includes two or more support portions in which a support hole penetrating in the axial direction is formed, and at least two of the two or more support portions are disposed side by side in the axial direction.