Methods for reducing distal embolization
First Claim
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1. A method for the evacuation of an occlusive substance from the wall of a blood vessel, comprising:
- positioning a distal end of a guidewire proximal to at least a portion of the occlusive substance on the wall of said blood vessel;
introducing an aspiration catheter over said guidewire;
aspirating through the aspiration catheter while crossing the site of the occlusive substance with both the distal end of the guidewire and a distal end of the aspiration catheter;
removing the aspiration catheter from the blood vessel; and
advancing a therapy catheter into the blood vessel to treat the occlusive substance after removing the aspiration catheter.
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Accused Products
Abstract
A method for reducing distal embolization during insertion of devices to treat plaque, thrombi and other intravascular occlusions. Using a guide catheter, a guidewire is delivered to a site proximal to the lesion. An aspiration catheter is then introduced over the guidewire, and the two are moved together in a distal to proximal direction across the occlusion. The aspiration catheter is then moved in a proximal to distal direction while continuously aspirating, which prevents embolization of any particles which may be created during the crossing of the guidewire.
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Citations
49 Claims
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1. A method for the evacuation of an occlusive substance from the wall of a blood vessel, comprising:
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positioning a distal end of a guidewire proximal to at least a portion of the occlusive substance on the wall of said blood vessel;
introducing an aspiration catheter over said guidewire;
aspirating through the aspiration catheter while crossing the site of the occlusive substance with both the distal end of the guidewire and a distal end of the aspiration catheter;
removing the aspiration catheter from the blood vessel; and
advancing a therapy catheter into the blood vessel to treat the occlusive substance after removing the aspiration catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 29, 30, 31)
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12. A method for treatment of an occlusion in a totally occluded blood vessel or partially occluded blood vessel defined by thrombolysis in myocardial infarction (TIMI) flow of 0-1, comprising:
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delivering a guidewire until its distal end is proximal to the occlusion;
delivering an aspiration catheter until a distal end of the aspiration catheter is proximal the occlusion;
simultaneously crossing the site of the occlusion in a proximal to distal direction with said distal end of the guidewire and the distal end of the aspiration catheter while aspirating;
moving the distal end of the aspiration catheter back across the site of the occlusion in a distal to proximal direction while aspirating;
exchanging said guidewire for a guidewire having an occlusive device at its distal end; and
positioning the occlusive device at a site distal to the occlusion, and activating said occlusive device. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for treatment of an occlusion in a partially occluded blood vessel, comprising:
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delivering a guidewire having an occlusive device at its distal end until the distal end is distal said occlusion;
delivering an aspiration catheter until its distal end is proximal to the occlusion;
activating said occlusive device; and
crossing the site of the occlusion with the distal end of the aspiration catheter while aspirating. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 48)
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32. A method for treating an occlusive substance from the wall of a blood vessel, comprising:
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positioning a distal end of a guidewire having an occlusive device at its distal end proximal to at least a portion of the occlusive substance on the wall of said blood vessel;
introducing an aspiration catheter over said guidewire;
prior to treating the occlusive substance, aspirating through the aspiration catheter while crossing the site of the occlusive substance with both the distal end of the guidewire and a distal end of the aspiration catheter; and
treating the occlusive substance. - View Dependent Claims (33, 34, 35, 36, 37)
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38. A method for treatment of an occlusion in a blood vessel, comprising:
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delivering a guidewire having a distal end until the distal end is distal of said occlusion;
delivering an aspiration catheter until its distal end is proximal to the occlusion;
crossing the site of the occlusion with the distal end of the aspiration catheter while aspirating, wherein the site of the occlusion is crossed with the distal end of the aspiration catheter in a proximal to distal direction while aspirating;
crossing the site of the occlusion with the distal end of the aspiration catheter in a distal to proximal direction while aspirating; and
repeating said crossing while aspirating in both a proximal to distal and in a distal to proximal direction.
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39. A method for treatment of an occlusion in a blood vessel, comprising:
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delivering a guidewire having a distal end until the distal end is distal of said occlusion;
delivering an aspiration catheter until its distal end is proximal to the occlusion;
crossing the site of the occlusion with the distal end of the aspiration catheter while aspirating; and
exchanging the guidewire for a guidewire having an occlusive device on its distal end. - View Dependent Claims (40)
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41. A method for treatment of an occlusion in a blood vessel, comprising:
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delivering a guidewire having a distal end until the distal end is distal of said occlusion;
delivering an aspiration catheter until its distal end is proximal to the occlusion;
activating an occlusive device within said vessel to at least partially occlude blood flow; and
crossing the site of the occlusion with the distal end of the aspiration catheter while aspirating and while said occlusive device is activated. - View Dependent Claims (42, 43, 44, 45, 46, 47, 49)
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Specification