Medical device for removing thromboembolic material from cerebral arteries and methods of use
First Claim
1. A method for treating a carotid or cerebral artery, comprising the steps of:
- inserting a distal end of a catheter into the carotid or cerebral artery, the catheter having a proximal end, a distal end, an expandable occluder mounted on the distal end, an aspiration port distal the occluder, and an aspiration lumen communicating with the port;
expanding the occluder to occlude the carotid or cerebral artery;
applying a negative pressure to the aspiration port; and
removing an occlusion from the carotid or cerebral artery.
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Accused Products
Abstract
The invention provides a medical device having an elongate catheter, a balloon occluder mounted on a distal end of the catheter, and optionally a chopping mechanism associated with an aspiration port of the catheter. Continuous or intermittent suction can be applied to the aspiration port which is distal to the occluder to dislodge thromboembolic material in a carotid or cerebral artery. Oxygenated blood or other fluid, which may be hypothermic, can be perfused through at least one perfusion port proximal to the occluder to maintain and augment perfusion of the collateral vasculature proximal to the occlusive lesion. The flow rate of blood or fluid can be controlled by rotating two cylindrical members. Neuroprotective agents or t-A can also be infused distal to the occluder through the aspiration port or an infusing port. Methods of using the devices in treating patients with acute stroke or occlusive cerebrovascular disease are also disclosed.
162 Citations
17 Claims
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1. A method for treating a carotid or cerebral artery, comprising the steps of:
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inserting a distal end of a catheter into the carotid or cerebral artery, the catheter having a proximal end, a distal end, an expandable occluder mounted on the distal end, an aspiration port distal the occluder, and an aspiration lumen communicating with the port;
expanding the occluder to occlude the carotid or cerebral artery;
applying a negative pressure to the aspiration port; and
removing an occlusion from the carotid or cerebral artery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification