Methods and Devices for Removal of Thromboembolic Material
First Claim
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1. A method for removing thromboembolic material from a patient using an extraction device, the method comprising the steps of:
- Identifying the treatment location of a thromboembolic material to be removed;
providing an extraction device having an aspiration catheter and a rotational member;
positioning the aspiration catheter at the treatment location proximally to thromboembolic material;
inserting the rotational member into the aspiration catheter, the rotational member comprising an elongate element having a distal tip positioned adjacent to the distal end of the aspiration catheter;
activating aspiration and rotation of the rotational member to draw thromboembolic material into and through a lumen of the aspiration catheter, and outside the patient;
wherein the rotational member traverses concomitant bends as the aspiration catheter during introduction to the treatment area and during the removal of thromboembolic material.
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Abstract
Methods and devices to remove thromboembolic material from the human body using rotational energy and aspiration are disclosed. A thromboembolic removal system includes an extraction device and drive unit. The extraction device is introduced to the treatment area and activated by the drive unit to separate, break apart, loosen or soften thromboembolic material and to facilitate its aspiration outside the patient.
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Citations
20 Claims
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1. A method for removing thromboembolic material from a patient using an extraction device, the method comprising the steps of:
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Identifying the treatment location of a thromboembolic material to be removed; providing an extraction device having an aspiration catheter and a rotational member; positioning the aspiration catheter at the treatment location proximally to thromboembolic material; inserting the rotational member into the aspiration catheter, the rotational member comprising an elongate element having a distal tip positioned adjacent to the distal end of the aspiration catheter; activating aspiration and rotation of the rotational member to draw thromboembolic material into and through a lumen of the aspiration catheter, and outside the patient; wherein the rotational member traverses concomitant bends as the aspiration catheter during introduction to the treatment area and during the removal of thromboembolic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for removing thromboembolic material from a patient using an extraction device, the method comprising the steps of:
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Identifying the treatment location of a thromboembolic material to be removed; introducing an aspiration catheter having at least one lumen to the treatment area using a guidewire; positioning the aspiration catheter at the treatment location proximally to thromboembolic material; inserting a rotational member into the aspiration catheter lumen, the rotational member comprising an elongate element having a distal end such that the distal tip of the rotational member is adjacent to the distal end of the aspiration catheter; activating aspiration and rotations of the rotational member to draw thromboembolic material into and through the lumen of the aspiration catheter, and outside the patient; and wherein the distal tip of the rotational member rotates along its longitudinal axis and is configured to change the compliance of the thromboembolic material and to facilitate its removal outside the patient. - View Dependent Claims (17, 18)
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19. A method for removing thromboembolic material from a patient, the method comprising:
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positioning an aspiration catheter and a rotational member at the location of thromboembolic material; and activating a vacuum within an aspiration catheter and activating rotations of a rotational member to remove thromboembolic material outside the patient; wherein the distal portion of the rotational member rotates along its longitudinal axis at a speed between 100 to 500,000 RPM and applies centripetal forces to facilitate the removal of thromboembolic material outside the patient. - View Dependent Claims (20)
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Specification