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US6682505B2
Expired / Lapsed
US
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Catheter for removing emboli from saphenous vein grafts and native coronary arteries
Assignee: W.L. Gore and Associates Inc
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Filing: 2001-07-19
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Granted: 2004-01-27
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Expires: 2021-07-19
Abstract
Abstract Methods and apparatus are provided for removing emboli generated during a surgical procedure comprising a catheter having proximal and distal ends, a lumen extending therethrough, an occlusive member affixed to the distal end, and at least one blood intake port disposed in a lateral surface of the catheter. The occlusive member preferably is disposed in a treatment vessel, and the blood intake port, when uncovered, permits a portion of the antegrade flow from a host vessel to be diverted into the lumen of the catheter. A pressure differential caused by the blood intake from the host vessel establishes a venturi-effect suitable for manipulating flow in the treatment vessel. The flow characteristics may be manipulated via the intake port to direct emboli into the lumen of the catheter for subsequent removal.
Inventors
- 👤 Mark C. Bates
- 👤 Michael Hogendijk
- 👤 Ryan P. Boucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:49
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0662; A61B; A61B17/00; A61B17/22; A61B17/22031; A61B17/221; A61F; A61F2/00; A61F2/01; A61F2/011; A61F2/013; A61F2/014; A61B17/00008; A61B17/34; A61B17/3417; A61B17/3421; A61B17/00234; A61B2017/00238; A61B2017/00243; A61B2017/00292; A61B2017/003; A61B2017/00318; A61B2017/00331; A61B2017/00336; A61B2017/00743; A61B2017/00778; A61B2017/00831; A61B2017/00867; A61B2017/00871; A61B2017/22051; A61B2017/22065; A61B2017/22067; A61B2017/22069; A61B2017/2215; A61B90/00; A61B90/08; A61B2090/0807; A61B2090/0811; A61B2217/00; A61B2217/002; A61B2217/005; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0065; A61F2230/0073; A61F2230/008; A61M1/00; A61M1/84; A61M25/10; A61M25/1011; A61M2025/1015; A61M2025/1043; A61M2025/1077; A61M2025/109; A61M2025/1095; A61M25/0067; A61M25/0068; A61M25/007
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
116 words
Apparatus for removing emboli from a blood vessel, the apparatus comprising: a catheter having a proximal end, a distal end, a blood outlet port at the proximal end, a distal inlet port at the distal end, a lateral surface, and a lumen extending between the proximal and distal ends; an occlusive member affixed to the distal end of the catheter at a location proximal of the distal inlet port; and at least one intake port disposed in the lateral surface proximal to the occlusive member, the blood intake port configured to induce venturi-assisted retrograde flow in a treatment vessel so that blood entering the lumen flows from the distal inlet port to the blood outlet port.
Claim 2
Dependent Claim
116 words
Apparatus for removing emboli from a blood vessel, the apparatus comprising: a catheter having a proximal end, a distal end, a blood outlet port at the proximal end, a distal inlet port at the distal end, a lateral surface, and a lumen extending between the proximal and distal ends; an occlusive member affixed to the distal end of the catheter at a location proximal of the distal inlet port; and at least one intake port disposed in the lateral surface proximal to the occlusive member, the blood intake port configured to induce venturi-assisted retrograde flow in a treatment vessel so that blood entering the lumen flows from the distal inlet port to the blood outlet port.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 wherein the occlusive member is inflatable and includes a tapered surface that communicates with the lumen.
Claim 4
Dependent Claim
21 words
The apparatus of claim 2 wherein the occlusive member is adapted to be disposed within the ostium of a treatment vessel.
Claim 5
Dependent Claim
15 words
The apparatus of claim 2 wherein the occlusive member further serves as an inflatable cuff.
Claim 6
Dependent Claim
35 words
The apparatus of claim 1 wherein the occlusive member comprises a self-expanding woven mesh having contracted a state suitable for transluminal insertion and an expanded state suitable for occluding antegrade flow in a treatment vessel.
Claim 7
Dependent Claim
17 words
The apparatus of claim 5 wherein the occlusive member has a rounded configuration and an internal lip.
Claim 8
Dependent Claim
20 words
The apparatus of claim 5 wherein the occlusive member comprises a plurality of split ends coated with an elastomeric coating.
Claim 9
Dependent Claim
56 words
The apparatus of claim 1 further comprising: a piston disposed for longitudinal motion within the catheter; and a flexible sheath affixed at a distal location to the piston and affixed at a proximal location to the catheter, so that proximally retracting the piston within the catheter causes the flexible sheath to form a balloon-shaped occlusive member.
Claim 10
Dependent Claim
16 words
The apparatus of claim 1 wherein the blood intake port has edges having variable angle configurations.
Claim 11
Dependent Claim
21 words
The apparatus of claim 1 wherein the blood intake port is disposed at an angle with respect to the catheter body.
Claim 12
Dependent Claim
23 words
The apparatus of claim 1 wherein the blood intake port has a pattern selected to enhance blood flow into the blood intake ports.
Claim 13
Dependent Claim
39 words
The apparatus of claim 1 wherein the catheter further comprises at least one deployable section, the deployable section having an expandable state wherein the proximal edges of the blood intake ports are raised with respect to the catheter body.
Claim 14
Dependent Claim
12 words
The apparatus of claim 1 wherein the blood intake port is circular.
Claim 15
Dependent Claim
13 words
The apparatus of claim 1 wherein the blood intake port is a slot.
Claim 16
Dependent Claim
33 words
The apparatus of claim 1 wherein the catheter further comprises a flexing member that separates a distal catheter section comprising the distal occlusive member and a proximal section comprising the blood intake port.
Claim 17
Dependent Claim
33 words
The apparatus of claim 15 further comprising a shape memory member having an expanded state suitable for bending the flexing member to form a substantially acute angle between the proximal and distal sections.
Claim 18
Dependent Claim
40 words
The apparatus of claim 1 further comprising: an outer sheath; and a hood, the hood being provided in a contracted state within the outer sheath and having an expanded state suitable for guiding blood flow into the blood intake port.
Claim 19
Independent Claim
175 words
A method for removing emboli during a medical procedure and manipulating flow characteristics in a treatment vessel, the method comprising: providing apparatus comprising a catheter having a proximal end, a distal end, a blood outlet port at the proximal end, an inlet port at the distal end, a lumen extending therethrough, an occlusive member affixed to the distal end at a location proximal of the distal end, and at least one blood intake port disposed in a lateral surface of the catheter; positioning the distal end of the catheter in a host vessel so that the inlet port extends in at least an ostium of the treatment vessel proximal to a stenosis; and deploying the occlusive member to prevent communication between the host and treatment vessels, such that a distal portion of the lumen communicates with flow in the treatment vessel; and flowing blood into the intake port so as to induce retrograde flow in the treatment vessel and cause blood entering the lumen through the inlet port to flow to the blood outlet port.
Claim 20
Independent Claim
175 words
A method for removing emboli during a medical procedure and manipulating flow characteristics in a treatment vessel, the method comprising: providing apparatus comprising a catheter having a proximal end, a distal end, a blood outlet port at the proximal end, an inlet port at the distal end, a lumen extending therethrough, an occlusive member affixed to the distal end at a location proximal of the distal end, and at least one blood intake port disposed in a lateral surface of the catheter; positioning the distal end of the catheter in a host vessel so that the inlet port extends in at least an ostium of the treatment vessel proximal to a stenosis; and deploying the occlusive member to prevent communication between the host and treatment vessels, such that a distal portion of the lumen communicates with flow in the treatment vessel; and flowing blood into the intake port so as to induce retrograde flow in the treatment vessel and cause blood entering the lumen through the inlet port to flow to the blood outlet port.
Claim 21
Dependent Claim
70 words
The method of claim 18 wherein deploying the occlusive member further comprises: providing a piston capable of longitudinally moving within the lumen of the catheter, and further providing a flexible sheath that is affixed at a distal location to the piston and affixed at a proximal location to the catheter; and proximally retracting the piston within the catheter to compress air within the sheath to form a balloon-shaped occlusive member.
Claim 22
Dependent Claim
32 words
The method of claim 18 wherein flowing blood into the intake port further comprises controlling fluid flow from a host vessel into the lumen of the catheter via the blood intake port.
Claim 23
Dependent Claim
22 words
The method of claim 20 wherein flowing blood into the intake port further comprises inducing venturi-assisted retrograde flow in the treatment vessel.
Claim 24
Dependent Claim
19 words
The method of claim 20 further comprising performing a medical procedure to treat a lesion in the treatment vessel.
Claim 25
Dependent Claim
20 words
The method of claim 22 further comprising directing emboli generated during the medical procedure into the lumen of the catheter.
Claim 26
Dependent Claim
44 words
The method of claim 22 wherein controlling fluid flow into the lumen further comprises: providing an inner sheath having at least one opening within the catheter; and actuating the inner sheath to allow the opening to overlap a selected amount with the intake port.
Claim 27
Dependent Claim
23 words
The method of claim 24 wherein actuating the inner sheath comprises rotating the inner sheath within the catheter relative to its longitudinal axis.
Claim 28
Dependent Claim
19 words
The method of claim 24 wherein actuating the inner sheath comprises longitudinally sliding the inner sheath within the catheter.
Claim 29
Dependent Claim
88 words
The method of claim 20 wherein controlling fluid flow into the lumen further comprises: providing a flexing member positioned proximal to the occlusive member, the blood intake port positioned proximal to the flexing member, and a shape memory member that is initially retracted; deploying the shape memory member to flex the flexing member to provide a substantially acute angle between the occlusive member and the intake port; and deploying the occlusive member proximal to a stenosis in a treatment vessel to anchor the distal end of the catheter.
Claim 30
Dependent Claim
31 words
The method of claim 27 further comprising proximally retracting a tensioning member affixed to a distal point within the lumen to bend the flexing member to increase the substantially acute angle.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-01-26 | 2007-07-28 | 2008-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-01-26 | 2011-07-28 | 2012-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-01-26 | 2015-07-28 | 2016-01-27 | $7700.00 | Window Closed / Lapsed |