CPC A61B 17/320758 (2013.01) [A61B 2017/320052 (2013.01); A61B 2017/320064 (2013.01); A61B 2217/005 (2013.01)] | 16 Claims |
1. A medical device for cutting an object in a body lumen, comprising:
a catheter to be inserted into the body lumen; and
a drive device interlocked with the catheter,
wherein the catheter includes
a rotatable drive shaft,
an outer tube in which the drive shaft is contained so as to be rotatable with respect thereto,
a cutting portion for cutting the object, fixed to a distal portion of the drive shaft, and
a hub portion fixed to a proximal portion of the outer tube and in which the drive shaft is contained so as to be rotatable with respect thereto,
wherein the drive device includes
a drive unit interlocked with the drive shaft to transmit a rotational force to the drive shaft, and
a hub support portion with which the hub portion is interlocked,
wherein the hub portion has first and second engagement portions interlocked with the hub support portion, and
wherein 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 to be actuated to release a state in which a rotation of the hub portion is blocked while maintaining a state in which movement of the hub portion in the axial direction is blocked.
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