Method for containing and removing occlusions in the carotid arteries
First Claim
1. A method for the treatment of an occlusion in a branch of a bifurcated blood vessel having a common portion and two branches, comprising:
- providing an elongate member having an occlusive device at a distal end portion thereof;
delivering the elongate member through the common portion of the bifurcated vessel and into a branch of the bifurcated vessel, such as the internal carotid artery;
positioning the occlusive device in said branch distal of the occlusion;
sliding a therapy catheter on the elongate member;
occluding said branch only on the distal side of the occlusion by actuating the occlusive device;
treating the occlusion with the therapy catheter;
continuing occlusion of said branch using the occlusive device while;
(a) delivering irrigation fluid to a distal end portion of the therapy catheter through an annulus between the therapy catheter and the elongate member;
(b) passing the irrigation fluid out of a fluid flow opening in the distal end portion of the therapy catheter;
(c) positioning the fluid flow opening of the therapy catheter in said branch of the vessel at a location near the occlusive device between the occlusive device and the treated occlusion, such that fluid flows across the treated occlusion; and
deactuating the occlusive device.
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Accused Products
Abstract
A method for the treatment of a stenosis or an occlusion in a blood vessel is disclosed in which a main catheter is first delivered to a site proximal to the occlusion. The main catheter may include an occlusive device at its distal end. An inner catheter or elongate member (e.g., a guidewire) having an occlusive device at its distal end is delivered to the site of the occlusion, and the occlusive device is activated at a site distal to the occlusion. A therapy catheter is then introduced to treat the occlusion. Next, a catheter is delivered just proximal to the occlusive device, and this catheter is used to aspirate and/or irrigate the area removing particles and debris. The aspiration and irrigation steps are preferably repeated until the particles and debris are removed. Perfusion may be performed by using a perfusion-filter distal of the lesion to be treated or a hypotube which extends beyond the occlusive device attached to the guidewire. The present invention provides for a minimally invasive procedure which can be performed quickly and efficiently, with reduced risks to the patient.
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Citations
24 Claims
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1. A method for the treatment of an occlusion in a branch of a bifurcated blood vessel having a common portion and two branches, comprising:
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providing an elongate member having an occlusive device at a distal end portion thereof;
delivering the elongate member through the common portion of the bifurcated vessel and into a branch of the bifurcated vessel, such as the internal carotid artery;
positioning the occlusive device in said branch distal of the occlusion;
sliding a therapy catheter on the elongate member;
occluding said branch only on the distal side of the occlusion by actuating the occlusive device;
treating the occlusion with the therapy catheter;
continuing occlusion of said branch using the occlusive device while;
(a) delivering irrigation fluid to a distal end portion of the therapy catheter through an annulus between the therapy catheter and the elongate member;
(b) passing the irrigation fluid out of a fluid flow opening in the distal end portion of the therapy catheter;
(c) positioning the fluid flow opening of the therapy catheter in said branch of the vessel at a location near the occlusive device between the occlusive device and the treated occlusion, such that fluid flows across the treated occlusion; and
deactuating the occlusive device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for treatment of an occlusion in a branch of a bifurcated blood vessel having a common portion and two branches, comprising:
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positioning an occlusive device distal of the occlusion to occlude said branch of the vessel;
treating the occlusion using a therapy device;
delivering irrigation fluid between the occlusion and the occlusive device such that irrigation fluid flows across the treated occlusion towards an intersection of said branch and the common portion, wherein emboli in said branch are carried to the intersection; and
allowing anatomical blood flow in the common portion to carry the emboli through another of the branches. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for the treatment of an occlusion in a blood vessel, comprising:
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providing an inner catheter comprising an elongate member having an occlusive device at a distal end portion thereof;
delivering the elongate member through the vessel;
positioning the occlusive device distal of the occlusion;
sliding a therapy catheter on the elongate member;
actuating the occlusive device such that it occludes the vessel;
treating the occlusion with the therapy catheter;
continuing occlusion of said vessel using the occlusive device while;
(a) delivering irrigation fluid through the elongate member;
(b) passing the irrigation fluid out of a fluid flow opening in the occlusive device such that fluid flows across the treated occlusion; and
deactuating the occlusive device. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification