Medical device and treatment method for crushing object in body lumen

A medical device for crushing an object in a body lumen when inserted into the corresponding body lumen, the device comprising:

• an elongated shaft portion;
• a crushing unit located on the shaft portion and provided with a plurality of bendable wire rods;
• and
• a sliding unit fixed to an end portion of the wire rods on at least one of a distal side or a proximal side thereof, the sliding unit being slidable in an axial direction of the shaft portion,
• wherein the sliding unit comprises a central sliding portion and an outer sliding portion provided radially outward of the central sliding portion, the central sliding portion including a first slit and a plurality of concave portions, the end portions of the wire rods being accommodated in the plurality of concave portions, the outer sliding portion including a second slit, and the first and second slits being aligned with one another to define a slit in an axial direction of the sliding unit.

A medical device for crushing an object in a body lumen when inserted into the corresponding body lumen, the device comprising:

• an elongated shaft portion;
• a crushing unit located on the shaft portion and provided with a plurality of bendable wire rods;
• and
• a sliding unit fixed to an end portion of the wire rods on at least one of a distal side or a proximal side thereof, the sliding unit being slidable in an axial direction of the shaft portion,
• wherein the sliding unit comprises a central sliding portion, an inner sliding portion provided radially inward of the central sliding portion, and an outer sliding portion provided radially outward of the central sliding portion, the central sliding portion including a first slit and a plurality of concave portions, the end portions of the wire rods being accommodated in the plurality of concave portions, the inner sliding portion including a second slit, the outer sliding portion including a third slit, and the first, second and third slits being aligned with one another to define a slit in an axial direction of the sliding unit.