Medical device
AssigneeTerumo Kabushiki Kaisha
InventorsYuichi TADA, Mizuho HIRAO
Life of this patent
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Abstract
A medical device is disclosed that can help prevent a guide wire from coming into contact with a rotating body in the middle of performing a treatment and achieves improvement in the efficiency of cutting an object by the rotating body. The medical device has a sheath that is insertable into a body lumen, a rotatable hollow rotating body that is disposed to protrude toward a distal side of the sheath, and guide wire lumens into which a guide wire is insertable in parallel with the sheath. A distal end surface of the rotating body has a concave-convex cut portion formed only between an inner distal end of the hollow rotating body and an outer periphery of the distal end of the hollow rotating body.
Claims20
A medical device for removing an object that exists in a body lumen, the medical device comprising:
- a sheath configured to be inserted into the body lumen;
- a drive shaft having a distal portion and a proximal portion, the drive shaft configured to extend through the sheath;
- a rotatable hollow rotating body located on the distal portion of the drive shaft, and wherein a distal end surface of the rotating body has a concave-convex cut portion formed only between an inner distal end of the hollow rotating body and an outer periphery of the distal end of the hollow rotating body;
- and
- a guide wire lumen into which a guide wire is insertable in parallel with the sheath, the guide wire lumen being located on an outer surface of the sheath.
A medical device for removing an object that exists in a body lumen, the medical device comprising:
- a sheath configured to be inserted into the body lumen;
- a drive shaft having a distal portion and a proximal portion, the drive shaft configured to extend through the sheath;
- and
- a rotatable hollow rotating body located on the distal portion of the drive shaft, and wherein a distal end surface of the rotating body includes a severing portion is formed between an inner circumference of the rotating body and an outer circumference of the rotating body, the severing portion including at least two different tapered portions, and each of the at least two different tapered portions includes a tapered portion on a distal side having an angle with respect to an axis in a longitudinal direction that is greater than an angle with respect to the axis in the longitudinal direction of a tapered portion on a proximal side.
A medical device for removing an object that exists in a body lumen, the medical device comprising:
- a sheath configured to be inserted into the body lumen;
- a drive shaft having a distal portion and a proximal portion, the drive shaft configured to extend through the sheath;
- a rotatable hollow rotating body located on the distal portion of the drive shaft, and wherein a distal end surface of the rotating body has a severing portion, the severing portion includes a plurality of concave-convex shaped notches arranged to be twisted in a circumferential direction of the rotating body on the distal end surface of the rotating body;
- and
- a guide wire lumen configured to receive a guide wire, the guide wire lumen being parallel to the sheath and arranged on an outer surface of the sheath.
Dependencies are inferred from the claim text.