Abstract: A catheter for removing an object in a body lumen includes an outer tube, a drive shaft surrounded by the tube, a cutting member connected to a distal end of the shaft to be rotated by the 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 first lumen extending adjacent to the cutting member along the axis, and a distal tip attached to a distal end of the guide wire tube and having a second lumen extending parallel to the rotation axis and communicating with the first lumen. The drive shaft includes a curved portion near the distal end thereof to cause the tip to contact a first inner surface of the body lumen when the curved portion contacts an opposite second inner surface of the body lumen.

Abstract: A catheter for removing an object in a body lumen includes a rotatable drive shaft including a spiral portion having a spiral shape near a distal end of the drive shaft, an outer tube surrounding the drive shaft, a cutting member connected to the 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 portion of the outer tube, extending substantially straight along a center spiral axis of the spiral portion, and having a first guide wire lumen, and a distal tip attached to a distal end of the guide wire tube and having a second guide wire lumen extending parallel to the rotation axis and communicating with the first guide wire lumen.

Abstract: A catheter for removing an object in a body lumen includes an outer tube, a shaft surrounded by the tube, a cutting member connected to the shaft to be rotated with respect to a rotation axis, a guide wire tube attached to the outer tube and having a first lumen for a guide wire and second lumens, a metal member attached to the wire tube, a part of the metal member surrounded by the member, a distal tip attached to the wire tube and having a third lumen communicating with the first lumen, and a pusher extending along the shaft, connectable to the distal tip or the metal member, and including wires that can pass through the second lumens. The pusher causes the cutting member to move toward a first surface of the body lumen when contacting an opposite second surface of the body lumen.

Abstract: A medical device that removes an object in a body lumen, includes a rotatable drive shaft, a cutter attached to a distal portion of the drive shaft and by which the object is cut, an outer tube surrounding the drive shaft, a guide wire tube attached to a distal portion of the outer tube and having a guide wire lumen therein, a metal member attached to the guide wire tube and including a first portion that extends along the guide wire tube and includes a first recess, and a distal tip made of a resin, disposed at a distal portion of the guide wire tube, and having a distal lumen that communicates with the guide wire lumen. The distal tip engages with the first recess of the metal member.

Abstract: A medical device that removes an object in a body lumen, includes a rotatable drive shaft, an outer tube that accommodates the drive shaft and is rotatable independent of the drive shaft, a cutter attached to a distal portion of the drive shaft for cutting the object, a first housing that accommodates a proximal portion of the drive shaft and has an outer surface including a first groove that extends around a rotation axis of the drive shaft, a second housing interlocked with a proximal portion of the outer tube and rotatable around the first housing, the second housing having an inner surface that faces the outer surface and includes a second groove that extends along the rotation axis, and a moving member that fits into the first and second grooves and is movable along the first and second grooves according to rotation of the second housing.

Abstract: A medical device that removes an object from a biological lumen, includes a rotatable drive shaft having a lumen through which the object passes, a cutting unit disposed at a distal end of the drive shaft and by which the object is cut, a proximal shaft to be rotated by a rotary force, a connection unit connecting the proximal shaft and the drive shaft and by which the rotary force is transmitted to the drive shaft, and a housing that houses the connection unit and includes a discharge port communicating with the lumen via the connection unit and through which the cut object is discharged. The connection unit includes a surface that faces a proximal end of the drive shaft and prevents the object that passed through the lumen and is to be discharged from being retained in the connection unit along a rotation axis thereof.