Intracranial aspiration catheter
First Claim
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1. A method for removing thromboembolic material from a carotid or cerebral artery, comprising the steps of:
- providing a catheter having a proximal end, a distal end, an expandable distal section having a distal port, an aspiration lumen communicating with the port, and an axially moveable support;
inserting the distal end of the catheter into the artery;
distally axially advancing the support to expand the distal section; and
applying a negative pressure to the aspiration port, to draw the thromboembolic material into the distal section.
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Accused Products
Abstract
Disclosed is an access catheter, having a distal segment which is moveable from a reduced outside diameter for positioning at a target site, and an enlarged outside diameter to create an enlarged internal working lumen. In one application, the catheter is configured for use as an intracranial aspiration catheter. Methods are also disclosed.
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Citations
36 Claims
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1. A method for removing thromboembolic material from a carotid or cerebral artery, comprising the steps of:
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providing a catheter having a proximal end, a distal end, an expandable distal section having a distal port, an aspiration lumen communicating with the port, and an axially moveable support;
inserting the distal end of the catheter into the artery;
distally axially advancing the support to expand the distal section; and
applying a negative pressure to the aspiration port, to draw the thromboembolic material into the distal section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An intracranial aspiration catheter, comprising:
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an elongate, flexible tubular body, having a proximal end, a distal end, and an aspiration lumen extending therethrough;
a distal section on the body in which the aspiration lumen is movable between a first, reduced inside diameter for transluminal navigation and a second, enlarged inside diameter for aspirating material;
a support for controllably supporting the aspiration lumen against collapse when in the second diameter; and
a control on the proximal end of the catheter for controlling the support. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A method of establishing a flow path through a catheter, positioned across a nonlinear segment of vasculature, comprising the steps of:
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transluminally navigating an enlargeable tubular wall through a nonlinear segment of vasculature;
manipulating a support within the tubular wall to enlarge the inside diameter of the tubular wall to create a flow path across the nonlinear segment. - View Dependent Claims (22, 23)
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24. A method of aspirating material, comprising the steps of:
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transluminally advancing a catheter to the site of an obstruction, the catheter having an aspiration lumen therein;
moving a support within the aspiration lumen; and
thereafter aspirating material from the obstruction through the aspiration lumen. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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32. An intracranial aspiration catheter, comprising:
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an elongate, flexible tubular body, having a proximal end, a distal end, and an aspiration lumen extending therethrough;
a distal section on the body in which the aspiration lumen is movable between a first, reduced inside diameter for transluminal navigation and a second, enlarged inside diameter for aspirating material;
a support which is axially movable between a proximal position when the aspiration lumen is in the first diameter and a distal position for supporting the aspiration lumen against collapse when in the second diameter. - View Dependent Claims (33, 34, 35, 36)
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Specification