Medical device

A medical device for transporting an object that exists in a body lumen, the medical device comprising:

• an elongated member having a lumen extending in an axial direction;
• a rotating body that rotates along with rotation of the elongated member on a distal portion of the elongated member;
• an insertion member partially inserted in the lumen of the elongated member on a distal side of the lumen, the insertion member being configured in a non-rotational state such that the insertion member does not rotate in conjunction with the rotation of the elongated member;
• and
• a breaking member fixed on an inner surface of the elongated member and which forms a gap between the insertion member and the breaking member in the lumen of the elongated member on the distal side, and wherein the breaking member exerts a shearing force to the object by rotating relative to the insertion member while the object is between the insertion member and the breaking member, the breaking member being fixed to the elongated member and/or the rotating body, and wherein the breaking member is configured to rotate along with the rotation of the elongated member.

A method for exerting a shearing force to an object from a stenosed site in a body lumen, the method comprising:

• inserting a medical device into the body lumen, the medical device including an elongated member having a lumen extending in an axial direction, an insertion member inserted in the lumen of the elongated member on a distal side of the lumen, and a breaking member fixed on an inner surface of the elongated member such that a gap is formed between the insertion member and the breaking member in the lumen of the elongated member on the distal side;
• and
• exerting a shearing force to the object by rotating the breaking member relative to the insertion member while the object is in the gap between the insertion member and the breaking member in the lumen of the elongated member on the distal side;
• separating the object of the stenosed site in the body lumen by exerting tension to the part of the stenosed site with a part of the stenosed site in the gap between the insertion member and the breaking member;
• and
• exerting a cutting force to the stenosed site via a cutting unit on a distal portion of the elongated member.