US5928192A
Expired / Lapsed
US
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Arterial aspiration
Assignee: Edwards Lifesciences Corp
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Filing: 1997-07-24
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Granted: 1999-07-27
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Expires: 2017-07-24
Abstract
Abstract A balloon occlusion device for aspirating embolic material from a blood vessel, such as from the aorta during cardiac surgery. The device includes an arterial cannula having a proximal end adapted to receive blood from a bypass-oxygenator machine, a distal end adapted to enter an artery, and a blood flow lumen extending between the proximal end and an outlet on the distal end. The cannula has an aspiration port proximate to the outlet, which communicates with an aspiration lumen. The cannula also includes an inflatable balloon attached to the cannula between the outlet and the aspiration port and capable of assuming an inflated condition for occluding a blood vessel. To use the device, the distal end of the cannula is introduced into a blood vessel, such as the aorta, the outlet is oriented downstream for delivering blood, and the balloon is inflated to occlude the vessel. Fluid may then be flushed into and aspirated out through the aspiration port as desired to remove loose embolic material from the vessel upstream of the balloon. Optionally, the device may include a second deployable balloon for further occluding the vessel at a second location.
Inventors
- 👤 Tracy D. Maahs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:32
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12027; A61B17/12036; A61B17/1204; A61B17/12045; A61B17/12099; A61B17/12109; A61B17/12131; A61B17/12136; A61B17/00234; A61B2017/00238; A61B2017/00243; A61B2017/00535; A61B2017/00557; A61M; A61M25/00; A61M25/10; A61M25/1011
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
130 words
An arterial cannula for aspirating a blood vessel and thereby removing loose embolic material within the vessel, the arterial cannula comprising: a cannula having a proximal end, a distal end adapted to enter an artery, and a blood flow lumen extending between the proximal end and an outlet on the distal end, wherein the distal end includes a curved portion extending substantially perpendicularly to a longitudinal axis of the cannula; a port proximal the curved portion of the distal end on the cannula proximate to the outlet, the port communicating with a lumen that extends proximally from the port along the cannula; and an expandable occluder attached to the cannula between the outlet and the port, the occluder being capable of assuming an expanded condition for occluding a blood vessel.
Claim 2
Dependent Claim
130 words
An arterial cannula for aspirating a blood vessel and thereby removing loose embolic material within the vessel, the arterial cannula comprising: a cannula having a proximal end, a distal end adapted to enter an artery, and a blood flow lumen extending between the proximal end and an outlet on the distal end, wherein the distal end includes a curved portion extending substantially perpendicularly to a longitudinal axis of the cannula; a port proximal the curved portion of the distal end on the cannula proximate to the outlet, the port communicating with a lumen that extends proximally from the port along the cannula; and an expandable occluder attached to the cannula between the outlet and the port, the occluder being capable of assuming an expanded condition for occluding a blood vessel.
Claim 3
Dependent Claim
12 words
The arterial cannula of claim 1, wherein the occluder is a balloon.
Claim 4
Dependent Claim
26 words
The arterial cannula of claim 2, wherein the inflatable balloon has an annular shape, and is attached on the curved outlet portion adjacent to the outlet.
Claim 5
Dependent Claim
146 words
An arterial cannula for aspirating a blood vessel and thereby removing loose embolic material within the vessel, the arterial cannula comprising: a cannula having a proximal end adapted to receive blood from a bypass-oxygenator machine, a distal end adapted to enter an artery, and a blood flow lumen extending between the proximal end and an outlet on the distal end; an aspiration port on the cannula proximate to the outlet, the aspiration port communicating with an aspiration lumen that extends proximally from the aspiration port along the cannula; a first inflatable balloon attached to the cannula between the outlet and the aspiration port, the first balloon being capable of assuming an inflated condition for occluding a blood vessel; and a second inflatable balloon deployable from the distal end of the cannula, the second balloon being capable of assuming an inflated condition for occluding a blood vessel.
Claim 6
Dependent Claim
146 words
An arterial cannula for aspirating a blood vessel and thereby removing loose embolic material within the vessel, the arterial cannula comprising: a cannula having a proximal end adapted to receive blood from a bypass-oxygenator machine, a distal end adapted to enter an artery, and a blood flow lumen extending between the proximal end and an outlet on the distal end; an aspiration port on the cannula proximate to the outlet, the aspiration port communicating with an aspiration lumen that extends proximally from the aspiration port along the cannula; a first inflatable balloon attached to the cannula between the outlet and the aspiration port, the first balloon being capable of assuming an inflated condition for occluding a blood vessel; and a second inflatable balloon deployable from the distal end of the cannula, the second balloon being capable of assuming an inflated condition for occluding a blood vessel.
Claim 7
Dependent Claim
43 words
The arterial cannula of claim 4, wherein the second balloon is attached to an elongate tubular member, the elongate tubular member being slidably received in the aspiration lumen, whereby the second balloon may be slidably deployed from and retracted into the aspiration port.
Claim 8
Independent Claim
126 words
A method of aspirating embolic material from the aorta, the method comprising the steps of: providing a cannula having a curved distal end, an outlet and a port on its distal end, and having a first expandable occluder between the outlet and the port; introducing the distal end of the cannula into the aorta; orienting the outlet in a downstream direction within the aorta; expanding the first occluder to occlude the aorta, thereby providing a fluid-tight seal between an upstream portion and a downstream portion of the aorta; introducing fluid through the port into the upstream portion of the aorta; and withdrawing the fluid from the upstream portion of the aorta through the port, thereby aspirating loose embolic material from the upstream portion of the aorta.
Claim 9
Independent Claim
126 words
A method of aspirating embolic material from the aorta, the method comprising the steps of: providing a cannula having a curved distal end, an outlet and a port on its distal end, and having a first expandable occluder between the outlet and the port; introducing the distal end of the cannula into the aorta; orienting the outlet in a downstream direction within the aorta; expanding the first occluder to occlude the aorta, thereby providing a fluid-tight seal between an upstream portion and a downstream portion of the aorta; introducing fluid through the port into the upstream portion of the aorta; and withdrawing the fluid from the upstream portion of the aorta through the port, thereby aspirating loose embolic material from the upstream portion of the aorta.
Claim 10
Dependent Claim
13 words
The method of claim 6, wherein the first expandable occluder is a balloon.
Claim 11
Dependent Claim
25 words
The method of claim 6, comprising the additional step of delivering blood from the outlet of the cannula into the downstream portion of the aorta.
Claim 12
Dependent Claim
59 words
The method of claim 6, wherein the cannula includes a second expandable occluder retractably deployable from the cannula, and wherein the method comprises the additional steps of: deploying the second occluder into the upstream portion of the aorta; and expanding the second occluder to isolate a region within the aorta extending from the first occluder to the second occluder.
Claim 13
Dependent Claim
13 words
The method of claim 9, wherein the second expanding occluder is a balloon.
Claim 14
Dependent Claim
16 words
The method of claim 6, wherein the cannula is introduced into the aorta by thorascopic access.
Claim 15
Independent Claim
155 words
A method of aspirating embolic material from the aorta during cardiac surgery, the method comprising the steps of: providing a cannula having an outlet and an aspiration port on its distal end, and having an inflatable balloon between the outlet and the aspiration port; introducing the distal end of the cannula into the aorta; orienting the outlet in a downstream direction within the aorta, thereby orienting the aspiration port in an upstream direction; inflating the balloon to occlude the aorta, thereby providing a fluid-tight seal between an upstream portion and a downstream portion of the aorta; delivering blood from a bypass-oxygenator machine through the outlet of the cannula into the downstream portion of the vessel; introducing fluid through the aspiration port into the upstream portion of the aorta; and withdrawing the fluid from the upstream portion of the aorta through the aspiration port, thereby aspirating loose embolic material from the upstream portion of the aorta.
Claim 16
Independent Claim
155 words
A method of aspirating embolic material from the aorta during cardiac surgery, the method comprising the steps of: providing a cannula having an outlet and an aspiration port on its distal end, and having an inflatable balloon between the outlet and the aspiration port; introducing the distal end of the cannula into the aorta; orienting the outlet in a downstream direction within the aorta, thereby orienting the aspiration port in an upstream direction; inflating the balloon to occlude the aorta, thereby providing a fluid-tight seal between an upstream portion and a downstream portion of the aorta; delivering blood from a bypass-oxygenator machine through the outlet of the cannula into the downstream portion of the vessel; introducing fluid through the aspiration port into the upstream portion of the aorta; and withdrawing the fluid from the upstream portion of the aorta through the aspiration port, thereby aspirating loose embolic material from the upstream portion of the aorta.
Claim 17
Dependent Claim
67 words
The method of claim 12, wherein the cannula includes a second balloon retractably deployable from the cannula, and wherein the method comprises the additional steps of: deploying the second balloon into the upstream portion of the aorta towards the coronary arteries; and inflating the second balloon to further occlude the aorta, thereby providing a fluid-tight seal between the upstream portion of the aorta and the coronary arteries.
Claim 18
Dependent Claim
168 words
An arterial cannula for aspirating a blood vessel and thereby removing loose embolic material within the vessel, the arterial cannula comprising: a cannula having a proximal end, a distal end, and a lumen extending between the proximal end and an outlet on the distal end; an aspiration port on the cannula proximate to the outlet, the aspiration port communicating with an aspiration lumen that extends proximally from the aspiration port along the cannula; a first inflatable balloon attached to the cannula between the outlet and the aspiration port, the first balloon being capable of assuming an inflated condition for occluding a blood vessel; and a second inflatable balloon deployable from the distal end of the cannula, the second balloon being capable of assuming an inflated condition for occluding a blood vessel, wherein the second balloon is attached to an elongate tubular member, the elongate tubular member being slideably received in the aspiration lumen, whereby the second balloon may be slideably deployed from and retracted into the aspiration port.
Claim 19
Dependent Claim
168 words
An arterial cannula for aspirating a blood vessel and thereby removing loose embolic material within the vessel, the arterial cannula comprising: a cannula having a proximal end, a distal end, and a lumen extending between the proximal end and an outlet on the distal end; an aspiration port on the cannula proximate to the outlet, the aspiration port communicating with an aspiration lumen that extends proximally from the aspiration port along the cannula; a first inflatable balloon attached to the cannula between the outlet and the aspiration port, the first balloon being capable of assuming an inflated condition for occluding a blood vessel; and a second inflatable balloon deployable from the distal end of the cannula, the second balloon being capable of assuming an inflated condition for occluding a blood vessel, wherein the second balloon is attached to an elongate tubular member, the elongate tubular member being slideably received in the aspiration lumen, whereby the second balloon may be slideably deployed from and retracted into the aspiration port.
Claim 20
Dependent Claim
29 words
The arterial cannula of claim 1, wherein the port is farther from the distal end of the cannula than the curved portion of the distal end of the cannula.
Claim 21
Dependent Claim
21 words
The arterial cannula of claim 1, wherein the port is within the curved portion of the distal end of the cannula.
Claim 22
Dependent Claim
29 words
The arterial cannula of claim 1, wherein the port is nearer to the distal end of the cannula than the curved portion of the distal end of the cannula.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-07-26 | 2003-01-25 | 2003-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-07-26 | 2007-01-25 | 2007-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-07-26 | 2011-01-25 | 2011-07-27 | $7700.00 | Window Closed / Lapsed |