Patent US6849068B1 successfully refreshed from Google Patents.
US6849068B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aspiration catheter
Assignee: Medtronic Vascular Inc
•
Filing: 1999-12-06
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Granted: 2005-02-01
•
Expires: 2019-12-06
Abstract
Abstract Aspiration catheters suitable for use in the treatment of an occlusion in a blood vessel are disclosed. These catheters are especially useful in the removal of occlusions from saphenous vein grafts, the coronary and carotid arteries, arteries above the aortic arch and even smaller vessels. The catheters of the present invention are provided in either over-the-wire or in single operator form. Radiopaque markers are preferably incorporated into distal ends of the catheters to facilitate their positioning within the body. The catheters are provided with varying flexibility along the length of the shaft, such that they are soft and flexible enough to be navigated through the vasculature of a patient without causing damage, but are stiff enough to sustain the axial push required to position the catheter properly and to sustain the aspiration pressures.
Inventors
- 👤 Celso J. Bagaoisan
- 👤 Hung V. Ha
- 👤 Mukund R. Patel
- 👤 Sivette Lam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:14
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1011; A61M2025/1015; A61M2025/1043; A61M2025/1052; A61M2025/109; A61M2025/1093
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
274 words
An aspiration catheter for removing emboli. or other particles from a blood vessel, comprising: an elongate flexible tubular body having a proximal end and a distal end, the body having an outer wall and an inner wall and being sized and configured to gain access into a patient's coronary vessel; an aspiration lumen defined by the inner wall, the aspiration lumen extending through the tubular body and having a substantially uniformly circular cross-section from the proximal end of the tubular body to the distal end of the tubular body, the aspiration lumen having a diameter between about 0.03″ to about 0.07″; an aspiration port at the proximal end of the tubular body and an aspiration mouth at the distal end of the tubular body, the aspiration port being in fluid communication with the aspiration lumen and the aspiration mouth; a guidewire lumen having a proximal end and a distal opening, wherein the guidewire lumen is sized and configured to receive a standard-size coronary guidewire therethrough, the guidewire lumen being connected only to a distal end portion of the tubular body, the guidewire lumen connected to the tubular body and adjacent the aspiration lumen such that the aspiration lumen and the guidewire lumen near the distal end portion of the body form essentially a figure eight configuration, and such that said aspiration lumen is unobstructed by said guidewire lumen, wherein the distal opening of the guidewire lumen is distal to the aspiration mouth, the aspiration mouth facing away from the guidewire lumen, whereby the guidewire lumen remains unobstructed during aspiration; and a source of negative pressure capable of establishing fluid communication with the aspiration port.
Claim 2
Dependent Claim
274 words
An aspiration catheter for removing emboli. or other particles from a blood vessel, comprising: an elongate flexible tubular body having a proximal end and a distal end, the body having an outer wall and an inner wall and being sized and configured to gain access into a patient's coronary vessel; an aspiration lumen defined by the inner wall, the aspiration lumen extending through the tubular body and having a substantially uniformly circular cross-section from the proximal end of the tubular body to the distal end of the tubular body, the aspiration lumen having a diameter between about 0.03″ to about 0.07″; an aspiration port at the proximal end of the tubular body and an aspiration mouth at the distal end of the tubular body, the aspiration port being in fluid communication with the aspiration lumen and the aspiration mouth; a guidewire lumen having a proximal end and a distal opening, wherein the guidewire lumen is sized and configured to receive a standard-size coronary guidewire therethrough, the guidewire lumen being connected only to a distal end portion of the tubular body, the guidewire lumen connected to the tubular body and adjacent the aspiration lumen such that the aspiration lumen and the guidewire lumen near the distal end portion of the body form essentially a figure eight configuration, and such that said aspiration lumen is unobstructed by said guidewire lumen, wherein the distal opening of the guidewire lumen is distal to the aspiration mouth, the aspiration mouth facing away from the guidewire lumen, whereby the guidewire lumen remains unobstructed during aspiration; and a source of negative pressure capable of establishing fluid communication with the aspiration port.
Claim 3
Dependent Claim
28 words
The catheter of claim 1 , wherein the guidewire lumen extends less than about 40 cm in a proximal direction from the distal end of the tubular body.
Claim 4
Dependent Claim
17 words
The catheter of claim 1 , wherein the guidewire lumen has an inner diameter of approximately 0.020″.
Claim 5
Dependent Claim
32 words
The catheter of claim 1 , wherein a distal end portion of the body is formed of a more flexible material than that used to form the rest of the tubular body.
Claim 6
Dependent Claim
141 words
An aspiration catheter for removing emboli or other particles from a blood vessel, comprising: an elongate tubular body having a proximal end and a distal end and an aspiration lumen extending between the proximal and distal ends, the aspiration lumen having a substantially uniformly circular cross-section from the proximal end to the distal end; an aspiration port at the proximal end of the tubular body, the aspiration port being in fluid communication with the aspiration lumen; an aspiration mouth at the distal end of the tubular body, the aspiration mouth being in fluid communication with the aspiration lumen; and a guidewire lumen having a proximal end and a distal end connected to the elongate tubular body, the guidewire lumen being shorter than the elongate tubular body; and a source of negative pressure capable of establishing fluid communication with the aspiration port.
Claim 7
Dependent Claim
141 words
An aspiration catheter for removing emboli or other particles from a blood vessel, comprising: an elongate tubular body having a proximal end and a distal end and an aspiration lumen extending between the proximal and distal ends, the aspiration lumen having a substantially uniformly circular cross-section from the proximal end to the distal end; an aspiration port at the proximal end of the tubular body, the aspiration port being in fluid communication with the aspiration lumen; an aspiration mouth at the distal end of the tubular body, the aspiration mouth being in fluid communication with the aspiration lumen; and a guidewire lumen having a proximal end and a distal end connected to the elongate tubular body, the guidewire lumen being shorter than the elongate tubular body; and a source of negative pressure capable of establishing fluid communication with the aspiration port.
Claim 8
Dependent Claim
21 words
The aspiration catheter of claim 5 , wherein the guidewire lumen is provided on the exterior of the elongate tubular body.
Claim 9
Dependent Claim
38 words
The aspiration catheter of claim 5 , wherein the proximal end of the guidewire lumen is closer to the distal end of the elongate tubular body than it is to the proximal end of the elongate tubular body.
Claim 10
Dependent Claim
22 words
The aspiration catheter of claim 5 , wherein the aspiration mouth forms a oblique opening that faces away from the guidewire lumen.
Claim 11
Dependent Claim
30 words
The aspiration catheter of claim 5 , wherein the guidewire lumen extends less than about 40 cm in a proximal direction from the distal end of the elongate tubular body.
Claim 12
Dependent Claim
27 words
The aspiration catheter of claim 5 , wherein the proximal end of the guidewire lumen forms an oblique opening that faces away from the elongate tubular body.
Claim 13
Dependent Claim
40 words
The aspiration catheter of claim 5 , wherein the elongate tubular body has a variable stiffness along its length, with a proximal portion of the elongate tubular body being less flexible than a distal portion of the elongate tubular body.
Claim 14
Dependent Claim
21 words
The aspiration catheter of claim 5 , further comprising a sleeve bonded to a distal portion of the elongate tubular body.
Claim 15
Dependent Claim
19 words
The aspiration catheter of claim 5 , wherein the aspiration lumen has a diameter between about 0.03″ and 0.07″.
Claim 16
Dependent Claim
299 words
An aspiration catheter for removing a wide range of occlusive substances including emboli, thrombi, plaque, and other substances from a blood vessel, the aspiration catheter being sized for introduction into a coronary vessel or graft, the aspiration catheter comprising: an elongate flexible tubular body having a proximal end and a distal end, the body having an outer wall and an inner wall and being sized and configured to gain access into a patient's coronary vessel; an aspiration lumen defined by the inner wall, the aspiration lumen extending through the tubular body along a central longitudinal axis and having a substantially uniformly circular cross-section from the proximal end of the tubular body to the distal end of the tubular body, the aspiration lumen being substantially unobstructed along its entire length, whereby said occlusive substances will not be trapped within said aspiration lumen; an aspiration port at the proximal end of the tubular body, the aspiration port being adapted to receive a source of negative pressure, the aspiration port being in fluid communication with the aspiration lumen; an aspiration mouth forming an unobstructed opening of the aspiration lumen at the distal end of the tubular body, the aspiration mouth forming an angle to the central longitudinal axis of the aspiration lumen, the aspiration mouth being in fluid communication with the aspiration lumen and the aspiration port; a guidewire lumen having a proximal end and a distal opening, the guidewire lumen being coupled with only a distal end portion of the tubular body, whereby the guidewire lumen remains unobstructed by particles during aspiration, the guidewire lumen having a transverse cross-sectional area that is from about one-third to about one-half the transverse cross-sectional area of the aspiration lumen; and a source of negative pressure capable of establishing fluid communication with the aspiration port.
Claim 17
Dependent Claim
299 words
An aspiration catheter for removing a wide range of occlusive substances including emboli, thrombi, plaque, and other substances from a blood vessel, the aspiration catheter being sized for introduction into a coronary vessel or graft, the aspiration catheter comprising: an elongate flexible tubular body having a proximal end and a distal end, the body having an outer wall and an inner wall and being sized and configured to gain access into a patient's coronary vessel; an aspiration lumen defined by the inner wall, the aspiration lumen extending through the tubular body along a central longitudinal axis and having a substantially uniformly circular cross-section from the proximal end of the tubular body to the distal end of the tubular body, the aspiration lumen being substantially unobstructed along its entire length, whereby said occlusive substances will not be trapped within said aspiration lumen; an aspiration port at the proximal end of the tubular body, the aspiration port being adapted to receive a source of negative pressure, the aspiration port being in fluid communication with the aspiration lumen; an aspiration mouth forming an unobstructed opening of the aspiration lumen at the distal end of the tubular body, the aspiration mouth forming an angle to the central longitudinal axis of the aspiration lumen, the aspiration mouth being in fluid communication with the aspiration lumen and the aspiration port; a guidewire lumen having a proximal end and a distal opening, the guidewire lumen being coupled with only a distal end portion of the tubular body, whereby the guidewire lumen remains unobstructed by particles during aspiration, the guidewire lumen having a transverse cross-sectional area that is from about one-third to about one-half the transverse cross-sectional area of the aspiration lumen; and a source of negative pressure capable of establishing fluid communication with the aspiration port.
Claim 18
Dependent Claim
20 words
The aspiration catheter of claim 14 , wherein the aspiration lumen has a diameter between about 0.03″ to about 0.07″.
Claim 19
Dependent Claim
22 words
The aspiration catheter of claim 14 , wherein the guidewire lumen is sized and configured to receive a standard-size coronary guidewire therethrough.
Claim 20
Dependent Claim
46 words
The aspiration catheter of claim 14 , wherein the guidewire lumen is connected to the tubular body adjacent to the aspiration lumen such that the aspiration lumen and the guidewire lumen form essentially a figure eight configuration near the distal end portion of the tubular body.
Claim 21
Dependent Claim
19 words
The aspiration catheter of claim 14 , and such that the aspiration lumen is unobstructed by the guidewire lumen.
Claim 22
Dependent Claim
21 words
The aspiration catheter of claim 14 , wherein the distal opening of the guidewire lumen is distal to the aspiration mouth.
Claim 23
Dependent Claim
17 words
The aspiration catheter of claim 14 , wherein the aspiration mouth faces away from the guidewire lumen.
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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) | 2008-02-01 | 2008-08-02 | 2009-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-02-01 | 2012-08-02 | 2013-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-02-01 | 2016-08-02 | 2017-02-01 | $7700.00 | Window Closed / Lapsed |