ATHERECTOMY DEVICES AND METHODS
First Claim
Patent Images
1. A device for removing material from body lumens, the device comprising:
- a catheter having a proximal end and a distal end and a catheter lumen extending therethrough;
a cutter assembly rotatably coupled to the distal end of the catheter, the cutter assembly including a cutter having at least one fluted cutting edge, the cutter located within a cylindrical housing and exposed at a distal opening in the cylindrical housing, where an edge of the distal opening forms a forward cutting surface, where the cylindrical housing and cutter rotate to remove tissue; and
a rotatable torque shaft extending through the catheter lumen and having a first end coupled to the cutter assembly and a second end adapted to couple to a rotating mechanism, an exterior surface of the torque shaft comprising a raised surface helically located thereon such that upon rotation, the raised surface conveys materials in a proximal direction.
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Accused Products
Abstract
The devices and methods generally relate to treatment of occluded body lumens. In particular, the present devices and method relate to removal of the occluding material from the blood vessels as well as other body lumens.
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Citations
66 Claims
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1. A device for removing material from body lumens, the device comprising:
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a catheter having a proximal end and a distal end and a catheter lumen extending therethrough;
a cutter assembly rotatably coupled to the distal end of the catheter, the cutter assembly including a cutter having at least one fluted cutting edge, the cutter located within a cylindrical housing and exposed at a distal opening in the cylindrical housing, where an edge of the distal opening forms a forward cutting surface, where the cylindrical housing and cutter rotate to remove tissue; and
a rotatable torque shaft extending through the catheter lumen and having a first end coupled to the cutter assembly and a second end adapted to couple to a rotating mechanism, an exterior surface of the torque shaft comprising a raised surface helically located thereon such that upon rotation, the raised surface conveys materials in a proximal direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A device for removing material from body lumens, the device comprising:
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a catheter having a proximal end and a distal end and a catheter lumen extending therethrough;
a cutter located at the distal end of the catheter body, the cutter comprising a housing having at least one opening and a cutter configured to rotate within the housing, the cutter includes least one fluted cutting edge that cuts in a first direction that is tangential to the rotational direction of the cutter, and where the cutter further includes at least one forward cutting surface that cuts in a second cutting direction when the catheter is moved in a distal or proximal direction and that is parallel to axis of the vessel, a torque shaft extending through the catheter lumen and having a first end coupled to the cutter assembly and a second end adapted to couple to a rotating mechanism, an exterior surface of the torque shaft comprising a raised surface helically located thereon such that upon rotation, the raised surface conveys materials in a proximal direction. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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60. A method for debulking material within a totally or partially occluded blood vessel, the method comprising:
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inserting a catheter body having a cutter assembly near a distal end of the catheter body within the blood vessel;
rotating a cutter in the cutter assembly to form a first opening, where the cutter includes at least one fluted cutting surface and at least one forward cutting surface, where on rotation of the cutter the fluted cutting surface cuts tangential to a rotational direction of the cutter, and where the forward cutting surface cuts approximately parallel to the axis of the vessel;
deflecting a distal portion of the catheter relative to an axis of the catheter body; and
moving the cutter in an arc having a radius greater than a radius of the catheter body to form a second opening in the body lumen where the second opening is larger than the first opening. - View Dependent Claims (61, 62, 63, 64, 65, 66)
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Specification