Neuro thrombectomy catheter
First Claim
Patent Images
1. A method of removing tissue from the vasculature of a brain, the method comprising:
- introducing a neuro thrombectomy catheter into a patient, the neuro thrombectomy catheter comprising an elongate, flexible tubular body having a proximal end and a distal end, the catheter comprising sufficient flexibility to traverse a vessel radius of curvature of about 5 mm or greater, the catheter further comprising a rotatable distal cutting tip positioned within a first lumen of the tubular body that, when rotated within a vessel of a patient, does not contact a wall of the vessel, wherein the neuro thrombectomy catheter comprises a guidewire lumen non-coaxial with the first lumen, the guidewire lumen having a distal guidewire port and a proximal guidewire port spaced distally apart from the proximal end of the tubular body, and the neuro thrombectomy catheter is introduced into the vasculature of the brain of the patient by advancing the guidewire lumen over a guidewire extending throughout the length of the tubular body and having a diameter of less than about 0.02 inches, wherein the distal guidewire port is distal to a distal opening of the first lumen and is positioned on a distal advance segment for enhancing the trackability of the neuro thrombectomy catheter;
advancing the distal end of the tubular body into the vasculature of the brain to a location proximate the tissue to be removed;
rotating the distal cutting tip to remove tissue from the patient without the distal cutting tip contacting the wall of the vessel in which the distal cutting tip is located; and
drawing tissue into the first lumen of the tubular body to remove the tissue from vasculature of the brain.
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Abstract
An elongate tubular body extends between a rotatable cutter and a control. The cutter is connected to the control with a rotatable element. A vacuum is applied through an annular passage defined between the tubular body and the rotatable element. The tubular body has a sufficiently small outside diameter and sufficient kink resistance and pushability to navigate through arteries such as the internal carotid artery.
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Citations
47 Claims
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1. A method of removing tissue from the vasculature of a brain, the method comprising:
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introducing a neuro thrombectomy catheter into a patient, the neuro thrombectomy catheter comprising an elongate, flexible tubular body having a proximal end and a distal end, the catheter comprising sufficient flexibility to traverse a vessel radius of curvature of about 5 mm or greater, the catheter further comprising a rotatable distal cutting tip positioned within a first lumen of the tubular body that, when rotated within a vessel of a patient, does not contact a wall of the vessel, wherein the neuro thrombectomy catheter comprises a guidewire lumen non-coaxial with the first lumen, the guidewire lumen having a distal guidewire port and a proximal guidewire port spaced distally apart from the proximal end of the tubular body, and the neuro thrombectomy catheter is introduced into the vasculature of the brain of the patient by advancing the guidewire lumen over a guidewire extending throughout the length of the tubular body and having a diameter of less than about 0.02 inches, wherein the distal guidewire port is distal to a distal opening of the first lumen and is positioned on a distal advance segment for enhancing the trackability of the neuro thrombectomy catheter; advancing the distal end of the tubular body into the vasculature of the brain to a location proximate the tissue to be removed; rotating the distal cutting tip to remove tissue from the patient without the distal cutting tip contacting the wall of the vessel in which the distal cutting tip is located; and drawing tissue into the first lumen of the tubular body to remove the tissue from vasculature of the brain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of removing tissue from the vasculature of a brain, the method comprising:
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introducing a neuro thrombectomy catheter into the vasculature of the brain of a patient, wherein the neuro thrombectomy catheter comprises an elongate, flexible tubular body having a proximal end and a distal end, a first lumen, and a guidewire lumen comprising a distal guidewire port and a proximal guidewire port spaced distally apart from the proximal end of the tubular body, the guidewire lumen non-coaxial with the first lumen, wherein the neuro thrombectomy catheter is introduced into the vasculature of the brain of the patient by advancing the guidewire lumen over a guidewire extending throughout the length of the tubular body and having a diameter of less than about 0.02 inches; cutting tissue from the vasculature of the brain of the patient, said cutting being performed by rotating a distal tip located within the first lumen of the tubular body to separate tissue from the vasculature while advancing said distal tip along the vasculature, wherein the distal tip, when rotating, is prevented from contacting the vessel wall; and drawing tissue once cut into the first lumen of the tubular body to remove tissue from vasculature of the brain. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. A method of removing thrombi from the brain, the method comprising:
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endovascularly introducing a neuro thrombectomy catheter of at least 165 cm length through a femoral artery puncture site to a target vessel within the vasculature of the brain, wherein the neuro thrombectomy catheter comprises an elongate, flexible tubular body, the neuro thrombectomy catheter having a rotatable cutting member located within a first lumen of the catheter at a distal portion thereof, wherein the neuro thrombectomy catheter comprises a guidewire lumen separate from and non-coaxial with the first lumen, the guidewire lumen having a distal guidewire port and a proximal guidewire port spaced distally apart from a proximal end of the tubular body, and the neuro thrombectomy catheter is introduced into the vasculature of the brain of the patient by advancing the guidewire lumen over a guidewire extending throughout the length of the tubular body and having a diameter of less than about 0.02 inches; infusing a drug through the first lumen into the target vessel proximate the thrombi; applying rotational energy to the rotatable cutting member to separate the thrombi from the target vessel wall without the rotatable cutting member engaging a wall of the target vessel; and applying a vacuum to a proximal end of the catheter to aspirate the thrombi from the target vessel through the first lumen after applying rotational energy to the rotatable cutting member. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38)
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39. A method of removing tissue from the vasculature of a brain, the method comprising:
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introducing a neuro thrombectomy catheter into a patient, the neuro thrombectomy catheter comprising an elongate, flexible tubular body having a proximal end and a distal end, the catheter comprising sufficient flexibility to traverse a vessel radius of curvature of about 5 mm or greater, the catheter further comprising a cutter positioned within a first lumen of the tubular body, wherein the neuro thrombectomy catheter comprises a guidewire lumen separate from the first lumen, the guidewire lumen having a distal guidewire port and a proximal guidewire port spaced distally apart from the proximal end of the tubular body, and the neuro thrombectomy catheter is introduced into the vasculature of the brain of the patient by advancing the guidewire lumen over a guidewire extending throughout the length of the tubular body and having a diameter of less than about 0.02 inches, such that guidewire lumen encircles the guidewire distal to the proximal guidewire port but does not encircle the guidewire proximal to the proximal guidewire port; advancing the distal end of the tubular body into the vasculature of the brain to a location proximate the tissue to be removed; using the cutter to remove tissue from the patient; and drawing tissue into the first lumen of the tubular body to remove the tissue from vasculature of the brain. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47)
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Specification