Aortic occluder with associated filter and methods of use during cardiac surgery
First Claim
1. A method for removing embolic material during an open surgical procedure, comprising the steps of:
- making an incision in an aorta;
introducing a distal end of a cannula into the aorta through the incision, wherein the cannula has an outer surface, a distal end adapted to enter an artery, a proximal end, a filter disposed about the distal end of the cannula which is expandable and contractable between a contracted condition and an enlarged condition, and an occluder which is expandable and contractable between a contracted condition and an expanded condition, and wherein the filter is in the contracted condition;
expanding the filter;
expanding the occluder to occlude the aorta in a region upstream of the filter, and thereafter contracting the occluder;
contracting the filter with embolic material from the aorta captured therein; and
removing the cannula and the captured embolic material from the aorta.
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Accused Products
Abstract
A balloon arterial cannula and methods for filtering blood. The devices generally include a mesh for filtering blood flowing within a blood vessel, particularly within an artery such as the aorta, a structure adapted to open and close the mesh within the blood vessel, a means to actuate the structure, and a balloon occluder which typically includes a flexible material enclosing a chamber. The methods generally include the steps of introducing a mesh into a blood vessel to capture embolic material, adjusting the mesh, if necessary, during the course of filtration, inflating the balloon occluder to occlude the vessel upstream of the mesh, and thereafter deflating the balloon occluder and removing the mesh and the captured foreign matter from the blood vessel. Additionally, visualization techniques are used to ensure effective filtration.
33 Citations
15 Claims
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1. A method for removing embolic material during an open surgical procedure, comprising the steps of:
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making an incision in an aorta; introducing a distal end of a cannula into the aorta through the incision, wherein the cannula has an outer surface, a distal end adapted to enter an artery, a proximal end, a filter disposed about the distal end of the cannula which is expandable and contractable between a contracted condition and an enlarged condition, and an occluder which is expandable and contractable between a contracted condition and an expanded condition, and wherein the filter is in the contracted condition; expanding the filter; expanding the occluder to occlude the aorta in a region upstream of the filter, and thereafter contracting the occluder; contracting the filter with embolic material from the aorta captured therein; and removing the cannula and the captured embolic material from the aorta. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for removing embolic material during an open surgical procedure, comprising the steps of:
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providing a blood cannula having a distal end and comprising disposed a filter disposed about the distal end and including an inflation seal that is controllaby inflatable and deflatable to change the filter between a contracted condition and an expanded condition the cannula further comprising an occluder configured to be controllable inflatable and deflatable to change the occluder between a contracted condition and an expanded condition; introducing the distal end of the blood cannula into the aorta through an incision with the inflation seal and the occluder in their respective contracted conditions, inflating the inflation seal to change the filter to its enlarged condition; inflating the occluder to change the occluder to its expanded condition so as to occlude the aorta in a region upstream of the filter; deflating the occluder to change the occluder to its contracted condition; deflating the inflation seal of the filter so as to change the filter to its contracted condition with embolic material from the aorta captured therein; and
removing the blood cannula and the captured embolic material from the aorta. - View Dependent Claims (9, 10, 11)
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12. A method for removing embolic material during an open surgical procedure, comprising the steps of:
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making an incision in an aorta; introducing a distal end of a cannula into the aorta through the incision, wherein the cannula has an outer surface, a distal end adapted to enter an artery, a proximal end a filter disposed about the distal end of the cannula which is expandable and contractable between a contracted condition and an enlarged condition, and an occluder disposed circumferentially about the cannula and that is expandable and contractable between a contracted condition and an expanded condition, and wherein the filter is in the contracted condition; expanding the filter to its enlarged condition; expanding the occluder to its expanded condition so as to occlude th aorta in a region upstream of the filter, and thereafter contracting the occluder to its contracted position; contracting the filter to its contracted position with embolic material from the aorta captured therein; and removing the cannula and the captured embolic material from the aorta. - View Dependent Claims (13)
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14. A method for removing embolic material during an open surgical procedure comprising the steps of:
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making an incision in an aorta; introducing a distal end of a cannula into the aorta through the incision, wherein the cannula has an outer surface, a distal end adapted to enter an artery, a proximal end, a filter disposed about the distal end of the cannula which is expandable and contractable between a contracted condition and an enlarged condition, and an occluder disposed radially along the side of the cannula and that is expandable and contractable between a contracted condition and an expanded condition, and wherein the filter is in the contracted condition; expanding the filter to its enlarged condition; expanding the occluder to its expanded condition so as to occlude the aorta in a region upstream of the filter, and thereafter contracting the occluder; contracting the filter to its contracted condition with embolic material from the aorta captured therein; and removing the cannula and the captured embolic material from the aorta. - View Dependent Claims (15)
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Specification