Devices and methods for preventing distal embolization using flow reversal in arteries having collateral blood flow
First Claim
1. A method for flow reversal in an artery of the head or neck having a proximal segment that branches into first and second distal segments, the first distal segment having a lesion and a source of collateral flow, the method comprising the steps of:
- inserting the distal end of a catheter into the proximal segment, the catheter having a proximal end, a distal end, and an expandable device on a distal region of the catheter;
locating the expandable device within the proximal segment;
expanding the expandable device to at least partially obstruct the proximal segment, wherein the second distal segment is at least partially open and wherein flow in the first distal segment is reversed to pass over the lesion and into the second distal segment.
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Accused Products
Abstract
The invention provides a medical device having a catheter and one or more expandable constricting/occluding members. The catheter is adapted for use with therapeutic or diagnostic devices, including an angioplasty/stent catheter and an atherectomy catheter. The constrictor/occluder is mounted at the distal end of the catheter. Manometers may be mounted distal to one or more constrictors for measuring pressure distal to the constrictor(s). Methods of using the devices are disclosed for preventing distal embolization during extracranial or intracranial carotid artery, vertebral artery, or coronary artery procedures, or procedures involving any vessel having collateral flow by reversing flow in the diseased vessel.
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Citations
19 Claims
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1. A method for flow reversal in an artery of the head or neck having a proximal segment that branches into first and second distal segments, the first distal segment having a lesion and a source of collateral flow, the method comprising the steps of:
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inserting the distal end of a catheter into the proximal segment, the catheter having a proximal end, a distal end, and an expandable device on a distal region of the catheter;
locating the expandable device within the proximal segment;
expanding the expandable device to at least partially obstruct the proximal segment, wherein the second distal segment is at least partially open and wherein flow in the first distal segment is reversed to pass over the lesion and into the second distal segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification