APPARATUS AND METHODS FOR REDUCING EMBOLIZATION DURING TREATMENT OF CAROTID ARTERY DISEASE
First Claim
1. Apparatus for removing emboli during an angioplasty or stenting procedure, the apparatus comprising:
- a catheter having proximal and distal ends, a lumen extending therethrough, and a blood outlet port in communication with the lumen, the catheter adapted to be disposed in a patient'"'"'s carotid artery;
an occlusion element disposed on the distal end of the catheter and having an opening that communicates with the lumen, the occlusion element having a contracted state suitable for transluminal insertion and an expanded state wherein the occlusion element occludes antegrade flow in the vessel;
a venous return catheter having proximal and distal ends, a lumen extending therethrough, and a blood inlet port in communication with the lumen; and
tubing that couples the blood outlet port to the blood inlet port.
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Accused Products
Abstract
Methods and apparatus are provided for removing emboli during an angioplasty, stenting or surgical procedure comprising a catheter having an occlusion element, an aspiration lumen, and a blood outlet port in communication with the lumen, a guide wire having a balloon, a venous return catheter with a blood inlet port, and tubing that couples the blood outlet port to the blood inlet port. Apparatus is also provided for occluding the external carotid artery to prevent reversal of flow into the internal carotid artery. The pressure differential between the artery and the vein provides reverse flow through the artery, thereby flushing emboli. A blood filter may optionally be included in-line with the tubing to filter emboli from blood reperfused into the patient.
157 Citations
20 Claims
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1. Apparatus for removing emboli during an angioplasty or stenting procedure, the apparatus comprising:
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a catheter having proximal and distal ends, a lumen extending therethrough, and a blood outlet port in communication with the lumen, the catheter adapted to be disposed in a patient'"'"'s carotid artery;
an occlusion element disposed on the distal end of the catheter and having an opening that communicates with the lumen, the occlusion element having a contracted state suitable for transluminal insertion and an expanded state wherein the occlusion element occludes antegrade flow in the vessel;
a venous return catheter having proximal and distal ends, a lumen extending therethrough, and a blood inlet port in communication with the lumen; and
tubing that couples the blood outlet port to the blood inlet port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for removing emboli from a vessel comprising:
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providing a catheter having proximal and distal ends, a lumen extending therethrough, an occlusion element disposed on the distal end, a hemostatic port coupled to the lumen, and a blood outlet port coupled to the lumen;
providing a venous return catheter having proximal and distal ends, a lumen extending therethrough, and a blood inlet port coupled to the lumen;
inserting the distal end of the catheter to a position proximal to the stenosis;
inserting the distal end of the venous return catheter into a remote vein;
deploying the occlusion element to occlude antegrade flow through the vessel;
causing blood to flow between the blood outlet port and the blood inlet port to induce reverse flow in, and remove emboli from, the vessel. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification