Multi-access intraprocedural embolic protection device
An embolic protection device comprises a tubular filter body attached to a sheath. The tubular filter body has an open upstream end and a generally closed downstream end for capturing emboli. A self-opening passage through the emboli capture end of the tubular filter body allows multiple catheters to be advanced from the sheath or otherwise into the filter body simultaneously or sequentially. The sheath is attached to a peripheral support structure near the emboli capture end of the filter body to facilitate deployment and retrieval of the filter body through a restraining delivery catheter.
1. A method for advancing a working catheter over a patient's aortic arch, said method comprising:
providing a cylindrical filter body formed at least partly from a tubular porous mesh having a cylindrical wall defining an upstream chamber with an open upstream end, a downstream chamber with an open downstream end, a self-sealing port integrally formed in the cylindrical wall at a location between said upstream and downstream chambers, said cylindrical filter body having a radially constrained delivery configuration and a radially expanded deployed configuration;
advancing a deployment catheter into the aortic arch, wherein a distal end of the deployment catheter is attached to a support on the cylindrical filter body while the cylindrical filter body is radially constrained by a delivery sheath to position the filter body over the aortic arch;
retracting the delivery sheath to radially expand the cylindrical filter body so that the cylindrical wall of the porous mesh covers the patient's aortic side vessels and the self-sealing port inverts to form a collection chamber within the upstream chamber, wherein the open upstream end of the filter body faces the patient's heart to direct blood flow through the open upstream end and emboli into the collection chamber, and wherein blood free from emboli flows through the cylindrical wall of the porous mesh into the aortic side vessels; and
advancing a first working catheter through the open downstream end of the downstream chamber of the filter body and through the self-sealing port into the upstream chamber and toward the heart.
2. A method as in claim 1 , further comprising advancing a second working catheter through the open downstream end of the filter body and through the self-sealing port toward the heart.
3. A method as in claim 2 , further comprising performing a first diagnostic or interventional procedure with the first working catheter and performing a second diagnostic or interventional procedure with the second working catheter.
4. A method as in claim 3 , wherein the first working catheter is introduced through a lumen in the deployment catheter and the second working catheter is introduced in parallel to the deployment catheter.
5. A method as in claim 3 , wherein the first working catheter introduces contrast media to an interventional site and the second working catheter performs an interventional procedure.
6. A method as in claim 5 , wherein the interventional procedure comprises delivery of a prosthetic aortic valve.
7. A method as in claim 1 , further comprising retrieving the radially expanded cylindrical filter body by retracting the deployment catheter to collapse the support to close the open downstream end of the cylindrical filter body and draw the closed downstream end of the cylindrical filter body into the delivery sheath.
8. A method as in claim 7 , wherein retracting the deployment catheter to collapse the support comprises retracting a tether present in a lumen of the deployment catheter to first collapse the support to close the open downstream end of the cylindrical filter body and then retracting the deployment catheter to draw the closed downstream end of the cylindrical filter body into the delivery sheath.