Axial lengthening thrombus capture system
First Claim
Patent Images
1. A method of retrieving a thrombus, comprising:
- accessing an interior of a blood vessel;
advancing an expanding guiding catheter and a shape memory body through the blood vessel, wherein the shape memory body comprises a first end, a second end, and an axial length therebetween;
positioning the expanding guiding catheter and the shape memory body such that the expanding guiding catheter is proximal to the thrombus and the first end of the shape memory body is distal to the thrombus;
expanding the first end of the shape memory body distal to the thrombus while the second end and a majority of the shape memory body remains compressed, wherein the second end is positioned proximal to the first end, wherein the shape memory body comprises a first expanded axial length;
adjusting the shape memory body wherein the shape memory body has a second expanded axial length greater than the first expanded axial length to capture the thrombus; and
retracting the shape memory body proximally and through a funnel opening of the expanding guiding catheter.
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Abstract
Systems and methods can remove material of interest, including blood clots, from a body region, including but not limited to the circulatory system for the treatment of pulmonary embolism (PE), deep vein thrombosis (DVT), cerebrovascular embolism, and other vascular occlusions.
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Citations
17 Claims
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1. A method of retrieving a thrombus, comprising:
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accessing an interior of a blood vessel; advancing an expanding guiding catheter and a shape memory body through the blood vessel, wherein the shape memory body comprises a first end, a second end, and an axial length therebetween; positioning the expanding guiding catheter and the shape memory body such that the expanding guiding catheter is proximal to the thrombus and the first end of the shape memory body is distal to the thrombus; expanding the first end of the shape memory body distal to the thrombus while the second end and a majority of the shape memory body remains compressed, wherein the second end is positioned proximal to the first end, wherein the shape memory body comprises a first expanded axial length; adjusting the shape memory body wherein the shape memory body has a second expanded axial length greater than the first expanded axial length to capture the thrombus; and retracting the shape memory body proximally and through a funnel opening of the expanding guiding catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of retrieving a thrombus, comprising:
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accessing an interior of a blood vessel; advancing an expanding guiding catheter and a shape memory body through the blood vessel, the shape memory body comprising a first end, a second end, and an axial length therebetween; positioning the expanding guiding catheter such that a distal end of the expanding guiding catheter is proximal to the thrombus; advancing the shape memory body through the expanding guiding catheter; positioning the shape memory body such that a distal end of the shape memory body is distal to the thrombus, the first end and the second end proximal to the distal end, the shape memory body having a first axial length; axially lengthening the shape memory body to have a second axial length to at least partially capture the thrombus; and retracting the thrombus into the expanding guiding catheter. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of retrieving a thrombus, comprising:
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accessing the interior of a blood vessel; advancing an expanding guiding catheter through the blood vessel; positioning the expanding guiding catheter such that a distal end of the expanding guiding catheter is proximal to a thrombus; retracting an outer member of the expanding guide catheter to expand a funnel tip and expose an expandable inner member; advancing a thrombus capture device comprising a capture assembly through the expanding guide catheter; positioning the thrombus capture device such that a distal end of the thrombus capture device is distal to or within the thrombus; actuating the capture assembly to isolate the thrombus within the thrombus capture device, wherein the capture assembly is movable from a first configuration having a first axial length and a second configuration having a second axial length, the second axial length being different from the first axial length, wherein the width of the capture assembly does not substantially change from the first configuration to the second configuration; axially lengthening the thrombus capture device distally and retracting the thrombus into the funnel tip of the expanding guide catheter; radially shortening the thrombus capture device to compress the thrombus and promote removal of the thrombus; and retracting the capture assembly with the thrombus into the funnel tip and the expandable inner member.
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Specification