US20020087119A1
Expired / Lapsed
US
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Apparatus and methods for reducing embolization during treatment of carotid artery disease
Assignee: W.L. Gore and Associates Inc
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Filing: 2001-11-16
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Granted: —
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Expires: 2021-11-16
Abstract
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.
Inventors
- 👤 Juan Parodi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:31
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12027; A61B17/1204; A61B17/12045; A61B17/12099; A61B17/12109; A61B17/12131; A61B17/12136; A61B17/12168; A61B17/12172; A61B17/22; A61F; A61F2/00; A61F2/01; A61F2/013; A61F2/014; A61M; A61M25/00; A61M25/10; A61M25/1002; A61M25/1027; A61M25/104; A61B17/221; A61B17/00234; A61B2017/00238; A61B2017/00243; A61B2017/22051; A61B2017/22065; A61B2017/22067; A61B2017/2215; A61B17/32; A61B17/3205; A61B17/3207; A61B2017/320716; A61B2217/00; A61B2217/002; A61B2217/005; A61B8/00; A61B8/06; A61F2/011; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61M2025/0001; A61M2025/0002; A61M25/01; A61M25/06; A61M25/0662; A61M2025/0681; A61M25/1029; A61M2025/1031; A61M2025/1043; A61M2025/1052; A61M2025/1065; A61M2025/1093; A61M2025/1095; A61M25/0043; A61M25/005
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
128 words
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.
Claim 2
Dependent Claim
128 words
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.
Claim 3
Dependent Claim
38 words
2 . The apparatus of claim 1 further comprising a wire having a distal end and a balloon disposed on the distal end, wherein the wire and balloon are sized to pass through the lumen of the catheter.
Claim 4
Dependent Claim
23 words
3 . The apparatus of claim 1 further comprising a blood filter coupled between the blood outlet port and the blood inlet port.
Claim 5
Dependent Claim
15 words
4 . The apparatus of claim 1 wherein the occlusion element is an inflatable member.
Claim 6
Dependent Claim
27 words
5 . The apparatus of claim 4 wherein the inflatable element has a pear-shape with a wall thickness that varies along the length of the inflatable member.
Claim 7
Dependent Claim
32 words
6 . The apparatus of claim 4 wherein a portion of the pear-shaped inflatable member extends beyond the distal end of the catheter in the contracted position and forms an atraumatic bumper.
Claim 8
Dependent Claim
15 words
7 . The apparatus of claim 1 wherein the occlusion element comprises a self-expanding basket.
Claim 9
Dependent Claim
39 words
8 . The apparatus of claim 1 wherein the catheter comprises: a non-stick tubular member; a layer of wire braid disposed surrounding the non-stick tubular member; and a layer of thermoplastic polymer disposed on the layer of wire braid.
Claim 10
Dependent Claim
25 words
9 . The apparatus of claim 1 wherein the catheter further comprises a second lumen through which the wire and inflatable balloon may be inserted.
Claim 11
Dependent Claim
25 words
10 . The apparatus of claim 1 further comprising a pump that removes blood through the catheter and reperfuses blood via the venous return catheter.
Claim 12
Dependent Claim
30 words
11 . The apparatus of claim 2 further comprising a resilient wedge affixed to the wire proximal of the balloon to reduce snagging of the balloon following a stenting procedure.
Claim 13
Dependent Claim
133 words
12 . A method for removing emboli from a vessel comprising: 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.
Claim 14
Dependent Claim
133 words
12 . A method for removing emboli from a vessel comprising: 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.
Claim 15
Dependent Claim
31 words
13 . The method of claim 12 further comprising: providing a blood filter; and coupling the blood filter in fluid communication between the blood outlet port and the blood inlet port.
Claim 16
Dependent Claim
55 words
14 . The method of claim 12 further comprising: providing a wire having a balloon; while flow is reversed in the vessel, advancing the balloon of the wire into the patient's external carotid artery; inflating the balloon of the wire to prevent reverse flow from the external carotid artery from entering the internal carotid artery.
Claim 17
Dependent Claim
37 words
15 . The method of claim 12 further comprising, while causing blood to flow between the blood outlet port and the blood inlet port, performing an interventional procedure with an interventional instrument inserted through the hemostatic port.
Claim 18
Dependent Claim
23 words
16 . The method of claim 12 wherein the occlusion element comprises a balloon, and deploying the occlusion element comprises inflating the balloon.
Claim 19
Dependent Claim
32 words
17 . The method of claim 12 wherein the occlusion element comprises a self-expanding basket, and deploying the occlusion element comprises retracting a sheath relative to the distal end of the catheter.
Claim 20
Dependent Claim
31 words
18 . The method of claim 14 wherein advancing the balloon of the wire into the patient's external carotid artery comprises advancing the balloon through a separate lumen of the catheter.
Claim 21
Dependent Claim
34 words
19 . The method of claim 12 further comprising: providing a pump; and actuating the pump to increase a rate of flow of blood between the blood outlet port and the blood inlet port.
Claim 22
Dependent Claim
49 words
20 . The method of claim 15 wherein performing an interventional procedure with an interventional instrument comprises delivering a stent within the vessel and the wire further comprises a resilient wedge, the method further comprising urging the resilient wedge against the stent during removal of the wire and balloon.
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