Apparatus and methods for material capture and removal
First Claim
1. A catheter for removing material from a body lumen, said catheter comprising:
- a catheter body having a proximal end and a distal end;
a material capture device arranged on said catheter body to engage said material; and
a cutting element mounted near the distal end of the catheter body to move between a first position and a second position to cut said material while said material is engaged by said material capture device, wherein motion of the cutting element urges the material capture device to draw cut material into the catheter body.
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Accused Products
Abstract
Catheters, kits, and methods are provided for removing material from a body lumen. The catheters and methods may be used in a variety of body lumens, including but not limited to coronary and other arteries. In general, the catheter has a cutting element that cuts material while the material is engaged by a material capture device on the catheter body. Preferably, the material capture device tensions the material during cutting, which reduces the amount of cutting force required. The material capture device typically follows a path that draws material into the catheter body. Preferably, but not necessarily, the material capture device may be arranged on the catheter body to advance along a path outwardly from the catheter body into the material and then inwardly towards the catheter body to tension the material. The cutting element on the catheter body moves between a first position and a second position to cut the material while in tension.
272 Citations
58 Claims
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1. A catheter for removing material from a body lumen, said catheter comprising:
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a catheter body having a proximal end and a distal end;
a material capture device arranged on said catheter body to engage said material; and
a cutting element mounted near the distal end of the catheter body to move between a first position and a second position to cut said material while said material is engaged by said material capture device, wherein motion of the cutting element urges the material capture device to draw cut material into the catheter body. - 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, 31, 32, 33, 35, 38, 39, 40, 41)
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34. A catheter for removing material from the wall of a body lumen, said catheter comprising:
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a catheter body having a proximal end and a distal end;
a side aperture on the catheter body;
a cutting blade adapted to advance past the aperture to sever material which intrudes through the aperture; and
a penetration member mounted to extend through the aperture to penetrate material in advance of the cutting blade and to draw material into the catheter body as the cutting blade is advanced past the aperture.
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36. A catheter for removing material from a body lumen, said catheter comprising:
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a catheter body having a proximal end and a distal end;
a material capture device arranged on said catheter body to advance along a path radially outwardly from the catheter body into said material and then inwardly towards the catheter body to tension said material; and
a cutting element on said catheter body moving between a first position and a second position to cut said material while said material is in tension.
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37. A catheter for removing material from a body lumen, said catheter comprising:
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a catheter body having a proximal end, a distal end, and an aperture;
a slidable, telescoping portion on said catheter body configured to extend outwardly from said aperture on the catheter body, said telescoping portion having a first open position leaving a gap between one edge of said portion and said catheter body to define a cutter window in which material may intrude to be engaged and having a second closed position wherein said cutting blade is positioned to cut off said material.
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42. A method for excising occlusive material from within a body lumen, said method comprising:
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capturing said occlusive material with a material capture device on a catheter body;
drawing said device radially inwardly towards the catheter body to tension the material; and
advancing a blade through the tensioned material to sever said material from the body lumen. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
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55. A method for removing material from a body lumen, said method comprising:
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positioning a catheter within the lumen;
extending a distal portion of the catheter forwardly to open an aperture, wherein material is invaginated into the aperture; and
closing the distal portion of the catheter to close the aperture and sever the invaginated material. - View Dependent Claims (56, 57)
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58. A kit comprising:
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a catheter having a material capture device and a cutting element;
instructions for use in removing material from a body lumen comprising engaging said material with a material capture device and tensioning said material towards the catheter while cutting said occlusive material with a cutting element; and
a package adapted to contain the device and the instructions for use.
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Specification