Apparatus and method for removing stenotic material from stents
First Claim
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1. A method for removing stenotic material from within a stent within a blood vessel, said method comprising:
- displacing a shearing body within the blood vessel so that it dislodges stenotic material from around an interface envelope defined by the stent within the stenotic material.
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Accused Products
Abstract
Apparatus and methods are provided for recanalizing stented regions within the vasculature which have become restenosed. A shearing body is displaced within the stented region in order to dislodge the stenotic material from an interface envelope defined by the inner surface of the stent. Usually, the shearing body will be compliant and sized slightly larger than the stent in order to remove stenotic material substantially uniformly around the entire interface envelope. The shearing body may be in the form of a brush, helical row, spaced-apart disks, solid compressible body, or a variety of other specific configurations.
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Citations
48 Claims
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1. A method for removing stenotic material from within a stent within a blood vessel, said method comprising:
displacing a shearing body within the blood vessel so that it dislodges stenotic material from around an interface envelope defined by the stent within the stenotic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for removing stenotic material from within a stent within a blood vessel, said method comprising:
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positioning a catheter on one side of the stent; translating a shearing body through the stent toward a distal end of the catheter to dislodge stenotic material from an interface envelope defined by the stent, and aspirating the dislodged stenotic material into the distal end of the catheter. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. An improved method for recanalizing a stented region in a blood vessel that has become restenosed, said method being of the type wherein stenotic material within the stented region is dislodged with a percutaneously introduced interventional catheter, wherein the improvement comprises:
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introducing an interventional catheter having a shearing body near a distal end thereof wherein at least a portion of the shearing body has a cross-sectional geometry which is sufficiently large to engage the entire interior surface of the stent when the shearing body is displaced within the stent; and displacing the shearing body within the stented region so that stenotic material is dislodged uniformly along an interface envelope defined by the stent. - View Dependent Claims (38, 39)
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40. An improved method for recanalizing a stented region in a blood vessel that has become restenosed, said method being of the type wherein stenotic material within the stented region is dislodged with a percutaneously introduced interventional catheter, wherein the improvement comprises:
rotating and translating a compliant shearing body through the stented region, wherein at least a portion of the compliant shearing body has a width which is greater than the diameter of the stent so that the shearing body is compressed by the stent as it passes therethrough. - View Dependent Claims (41, 42)
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43. An improved method for recanalizing a stented region in a blood vessel that has become restenosed, said method being of the type wherein stenotic material within the stented region is dislodged with a percutaneously introduced interventional catheter, wherein the improvement comprises:
rotating and translating a tapered shearing body through the stented region, wherein a small width end of the tapered shearing body enters the stented region first. - View Dependent Claims (44, 45)
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46. An improved method for recanalizing a stented region in a blood vessel that has become restenosed, said method being of the type wherein stenotic material within the stented region is dislodged with a percutaneously introduced interventional catheter, wherein the improvement comprises:
rotating and translating a helical shearing body through the stented region. - View Dependent Claims (47, 48)
Specification