Catheter engaged with a pusher

A medical device for removing an object in a body lumen, comprising:

• a handle including a motor configured to generate rotation torque;
• and
• a catheter connectable to the handle and including:
• an outer tube,
• a drive shaft surrounded by the outer tube and rotatable by the generated rotation torque,
• a cutting member connected to a distal end of the drive shaft to be rotated by the drive shaft with respect to a rotation axis and by which the object is cut,
• a guide wire tube attached to a distal end of the outer tube and having a plurality of lumens extending parallel to the rotation axis, the plurality of lumens including a first lumen through which a guide wire can pass and one or more second lumens,
• a metal member attached to the guide wire tube, a part of the metal member being surrounded by the cutting member,
• a distal tip attached to a distal end of the guide wire tube and having a third lumen extending parallel to the rotation axis and communicating with the first lumen, and
• a pusher at least partially extending along the drive shaft, connectable to either the distal tip or the metal member, and including one or more first wires that can pass through the one or more second lumens, wherein
• the pusher causes the cutting member to move toward a first inner surface of the body lumen when the pusher contacts a second inner surface of the body lumen that is on an opposite side of the body lumen with respect to the first inner surface.

A method for removing an object in a body lumen using a catheter that includes:

• an outer tube,
• a rotatable drive shaft surrounded by the outer tube,
• a cutting member connected to a distal end of the drive shaft to be rotated by the drive shaft with respect to a rotation axis and by which the object is cut,
• a guide wire tube attached to a distal end of the outer tube and having a plurality of lumens extending parallel to the rotation axis, the plurality of lumens including a first lumen through which a guide wire can pass and one or more second lumens,
• a metal member attached to the guide wire tube, a part of the metal member being surrounded by the cutting member,
• a distal tip attached to a distal end of the guide wire tube and having a third lumen extending parallel to the rotation axis and communicating with the first lumen, and
• a pusher at least partially extending along the drive shaft, connectable to either the distal tip or the metal member, and including one or more first wires that can pass through the one or more second lumens, the method comprising:
• inserting the catheter into the body lumen;
• moving either the drive shaft or the pusher with respect to the other along the rotation axis such that the pusher contacts a first inner surface of the body lumen;
• positioning the cutting member to an object on a second inner surface that is on an opposite side of the body lumen with respect to the first inner surface and removing the object;
• and
• removing the catheter from the body lumen.

A catheter for removing an object in a body lumen, comprising:

• an outer tube;
• a rotatable drive shaft surrounded by the outer tube;
• a cutting member connected to a distal end of the drive shaft to be rotated by the drive shaft with respect to a rotation axis and by which the object is cut;
• a guide wire tube attached to a distal end of the outer tube and having a plurality of lumens extending parallel to the rotation axis, the plurality of lumens including a first lumen through which a guide wire can pass and one or more second lumens;
• a distal tip attached to a distal end of the guide wire tube and having a third lumen extending parallel to the rotation axis and communicating with the first lumen;
• and
• a pusher at least partially extending along the drive shaft, connectable to the distal tip, and including one or more first wires that can pass through the one or more second lumens, wherein
• the pusher causes the cutting member to move toward a first inner surface of the body lumen when the pusher contacts a second inner surface that is on an opposite side of the body lumen with respect to the first inner surface.