Devices and methods for preventing distal embolization from the internal carotid artery using flow reversal by partial occlusion of the external carotid artery
First Claim
1. A method for flow reversal down an internal carotid artery having an atheromatous lesion and up the external carotid artery, the method comprising the steps of:
- providing a catheter having a proximal end, a distal end, and a lumen therebetween, the distal end having an occluding member and a constricting member distal the occluder;
inserting the distal end of the catheter into the carotid artery in an antegrade direction;
locating the constricting member within the external carotid artery;
locating the occluding member within the common carotid artery;
expanding the occluding member to occlude the common carotid artery; and
expanding the constricting member to constrict the external carotid artery, wherein blood flow in the internal carotid artery is reversed to pass over the atheromatous lesion and toward the external carotid artery.
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Accused Products
Abstract
The invention provides a medical device having a catheter, an expandable occluding member and a constricting member. The catheter has a lumen communicating with a port at its distal end. The lumen and port are adapted for introduction of therapeutic or diagnostic devices, including an angioplasty/stent catheter, an atherectomy catheter, and a blood filter, into the carotid artery. The occluder is mounted proximal to the port of the catheter, and the constrictor is mounted distal to the port. Manometers may be mounted distal to the occluder and/or the constrictor for measuring pressure proximal and distal to the constrictor. A pump, operably associated with a shunt mounted through a second occluder, may be used instead of the constrictor to facilitate passage of blood through the second occluder. Methods of using the devices for preventing distal embolization during carotid procedures by reversing blood flow in the internal carotid artery toward the external carotid artery are disclosed.
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Citations
20 Claims
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1. A method for flow reversal down an internal carotid artery having an atheromatous lesion and up the external carotid artery, the method comprising the steps of:
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providing a catheter having a proximal end, a distal end, and a lumen therebetween, the distal end having an occluding member and a constricting member distal the occluder; inserting the distal end of the catheter into the carotid artery in an antegrade direction; locating the constricting member within the external carotid artery; locating the occluding member within the common carotid artery; expanding the occluding member to occlude the common carotid artery; and expanding the constricting member to constrict the external carotid artery, wherein blood flow in the internal carotid artery is reversed to pass over the atheromatous lesion and toward the external carotid artery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for flow reversal in a carotid artery having a proximal segment which branches into first and second distal segments, the first distal segment having an atheromatous lesion, the method comprising the steps of:
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providing a catheter having a proximal end, a distal end, and a lumen therebetween, the distal end having an occluding member and a constricting member distal the occluder; inserting the distal end of the catheter into the carotid artery in an antegrade direction; locating the constricting member within the second distal segment of the carotid artery; locating the occluding member within the proximal segment of the carotid artery; expanding the occluding member to occlude the proximal segment of the carotid artery; and expanding the constricting member to constricting the second distal segment of the carotid artery, wherein blood flow in the first distal segment of the carotid artery is reversed to pass over the atheromatous lesion and toward the second distal segment of the carotid artery. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification