Medical device for removing thromboembolic material from cerebral arteries and methods of use
First Claim
1. A medical device for removing thromboembolic material from a carotid artery or any other extracranial or intracranial artery, comprising:
- an elongate catheter having a proximal end, a distal end, and a lumen therebetween communicating with an aspiration port at the distal end, the catheter further comprising first and second concentric cylindrical members and a perfusion lumen communicating with one or more perfusion ports, whereby relative rotation of the first and second members causes the perfusion ports on the first member to align with the perfusion ports on the second member;
a balloon occluder mounted on the distal end of the catheter proximal the aspiration port and distal the one or more perfusion ports; and
a chopping mechanism associated with the aspiration port, wherein thromboembolic material engaged by suction through the aspiration port is chopped and aspirated through the catheter.
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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-PA 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.
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Citations
29 Claims
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1. A medical device for removing thromboembolic material from a carotid artery or any other extracranial or intracranial artery, comprising:
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an elongate catheter having a proximal end, a distal end, and a lumen therebetween communicating with an aspiration port at the distal end, the catheter further comprising first and second concentric cylindrical members and a perfusion lumen communicating with one or more perfusion ports, whereby relative rotation of the first and second members causes the perfusion ports on the first member to align with the perfusion ports on the second member; a balloon occluder mounted on the distal end of the catheter proximal the aspiration port and distal the one or more perfusion ports; and a chopping mechanism associated with the aspiration port, wherein thromboembolic material engaged by suction through the aspiration port is chopped and aspirated through the catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. 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 occluder mounted on the distal end, an aspiration port distal the occluder, an aspiration lumen communicating with the port, and a chopping mechanism; inserting the distal end of the catheter into the artery; expanding the occluder to occlude the artery; applying a negative pressure to the aspiration port, wherein the thromboembolic material is engaged by the port; and operating the chopping mechanism to remove at least a portion of the thromboembolic material. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification