Methods and apparatus for occluding a blood vessel
First Claim
1. An apparatus for occluding a blood vessel comprising:
- a cannula adapted for insertion through a wall of a blood vessels, said cannula having a first lumen having a proximal opening and a distal opening;
an expandable member coupled to a distal end of the cannula, the expandable member having an integral lumen formed therethrough, said integral lumen being fluidly coupled to said distal opening of the cannula and having at least one opening on the exterior of the expandable member the expandable member having a sufficient size when expanded to be adjacent an inner surface of the lumen of the blood vessel; and
a clamp coupled to the cannula, the clamp having an inner surface configured to engage an outer surface of an annular region of the blood vessel and being aligned with the expandable member such that the clamp moves the annular region of the blood vessel into contact with the expandable member to occlude the blood vessel and maintain the expandable member in a desired location.
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Accused Products
Abstract
An improved method and apparatus for occluding a blood vessel is shown and described. A cannula adapted for insertion through a wall of a blood vessel is provided with an expandable member on a distal end which when expanded, substantially fills a cross-sectional annular area of the lumen of the blood vessel. An external clamp is coupled to the cannula and aligned with the expandable member, such that when the clamp is engaged, it moves the annular region of the blood vessel into contact with the inflatable member, the inflatable member and clamp thereby working in cooperation to occlude the blood vessel. The cannula may further be provided with a plurality of lumens extending through the cannula to corresponding openings in a distal end of the cannula, thereby allowing the perfusion of different fluids into the lumen of the blood vessel, both upstream and downstream of the internal occluding member, as well as the venting of fluid from the lumen of the blood vessel. A suture tourniquet may also be coupled to the cannula. Multiple functions are therefore performed by a compact, efficient device that is simple to use. In addition, occlusion is achieved with minimal deformation to the blood vessel, reducing the risk of trauma to the blood vessel and the creation of emboli. The intraluminal occlusion device is also securely held in a selected position, thereby reducing risk of harm to the patient from emboli and undesirable blocking of perfusion of blood to the rest of the patient'"'"'s body.
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Citations
16 Claims
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1. An apparatus for occluding a blood vessel comprising:
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a cannula adapted for insertion through a wall of a blood vessels, said cannula having a first lumen having a proximal opening and a distal opening; an expandable member coupled to a distal end of the cannula, the expandable member having an integral lumen formed therethrough, said integral lumen being fluidly coupled to said distal opening of the cannula and having at least one opening on the exterior of the expandable member the expandable member having a sufficient size when expanded to be adjacent an inner surface of the lumen of the blood vessel; and a clamp coupled to the cannula, the clamp having an inner surface configured to engage an outer surface of an annular region of the blood vessel and being aligned with the expandable member such that the clamp moves the annular region of the blood vessel into contact with the expandable member to occlude the blood vessel and maintain the expandable member in a desired location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus for occluding a blood vessel comprising:
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an intraluminal occlusion device that is expandable to a size wherein the intraluminal occlusion device is adjacent an inner surface of a blood vessel; and a clamp having a first arm and a second arm, the first and second arms having fixed interior surfaces adapted to substantially conform to and engage an outer surface of an annular region of the blood vessel when the first and second arms are closed relative to one another, the clamp being aligned with the intraluminal occlusion device such that the fixed interior surfaces of the first and second arms move the annular region of the blood vessel into contact with the intraluminal occlusion device, the intraluminal occlusion device and the clamp thereby working in cooperation to occlude the blood vessel and maintain the intraluminal occlusion device in a desired location. - View Dependent Claims (10, 11, 12)
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13. A method of temporarily occluding a blood vessel comprising the steps of:
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providing a clamping device having a semi-rigid shaft, the semi-rigid shaft having a clamp on a distal end thereof and a lumen extending between a proximal end and the distal end of the shaft; providing a catheter having an expandable member coupled to a distal end thereof; providing a trocar slidably disposed over the catheter, wherein the trocar has a distal tip with an expandable opening; creating a purse string suture at a selected location at a selected region of the blood vessel; directing the distal end of the clamping device to the selected region with the clamp in an open position; closing the clamp around the blood vessel, thereby substantially engaging an outer periphery of the blood vessel at the selected region; inserting the catheter and the trocar through the lumen in the clamping device; extending the distal tip of the trocar through the wall of the blood vessel at the selected region; deploying the distal end of the catheter and the expandable member coupled thereto through the expandable opening in the trocar; expanding the expandable member to engage an inner wall of the blood vessel at the selected regions; performing a surgical procedure while the expandable member is expanded; deflating the expandable member; and withdrawing the catheter with the expandable member coupled thereto from said vessel. - View Dependent Claims (14, 15, 16)
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Specification