Arterial occluding cannula and methods of use
First Claim
1. An arterial cannula comprising:
- an elongate tubular member 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, 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 second lumen that extends proximally from the port along the cannula; and
a medical device adapted for insertion through the second lumen and beyond the port into the aorta.
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Accused Products
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.
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Citations
20 Claims
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1. An arterial cannula comprising:
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an elongate tubular member 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, 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 second lumen that extends proximally from the port along the cannula; and
a medical device adapted for insertion through the second lumen and beyond the port into the aorta. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An arterial cannula for aspirating a blood vessel and thereby removing loose embolic material within the vessel, the arterial cannula comprising:
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a cannula having a proximal end adapted to receive blood from a bypass-oxygenator machine, a distal end adapted to enter an artery, a blood flow lumen and an aspiration lumen, each lumen extending between a proximal portion of the cannula and the distal end thereof and being substantially isolated from one another, wherein each lumen is adapted to extend out of the blood vessel when the cannula is deployed;
an aspiration port on the distal end communicating with the aspiration lumen;
a blood flow outlet on the distal end communicating with the blood flow lumen; and
a medical device adapted for insertion through the aspiration lumen and beyond the aspiration port into the blood vessel. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for occluding the aorta, said method comprising the steps of:
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providing a cannula having an outlet and a port on its distal end, the outlet on the opposite side of the catheter from the port;
introducing the distal end of the cannula into the aorta;
orienting the outlet in a downstream direction within the aorta, thereby orienting the port in an upstream direction;
introducing a medical device through the port into the aorta; and
deploying the medical device into the aorta towards the coronary arteries. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
introducing aspiration fluid through the port into the isolated region; and
withdrawing the aspiration fluid through the port, thereby aspirating loose embolic material from the isolated region.
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19. The method of claim 13, wherein the cannula is introduced into the aorta by thorascopic access.
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20. The method of claim 13, wherein the cannula is introduced into the aorta by direct access.
Specification