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. An embolic protection device, said device comprising:
a filter body comprising a single wall tubular porous mesh having an open upstream end, an open downstream end, and a port disposed on an upstream side of the open downstream end, wherein a portion of said single-wall tubular porous mesh is folded to form said port comprising an expandable opening configured to conform to at least one working catheter passing therethrough;
a radially collapsible and expandable support comprising a wire loop attached about a periphery of the downstream end of the filter body;
a catheter body having a distal end coupled to the radially collapsible and expandable support; and
a delivery sheath having a lumen configured to receive and radially constrain the filter body;
wherein the catheter body may be distally advanced relative to the delivery sheath to release the filter body from constraint and to allow the filter body to radially expand and wherein the catheter body may be proximally retracted relative to the delivery sheath to reposition the support and filter body back into the lumen of the delivery sheath such that the support radially collapses the downstream end of the filter body prior to the filter body being repositioned within the lumen.
2. An embolic protection device as in claim 1 , wherein the wire loop is secured around the entire periphery of the downstream end of the filter body.
3. An embolic protection device as in claim 2 , wherein the catheter body has at least one deployment lumen which receives a tether attached to the loop.
4. An embolic protection device as in claim 3 , wherein the loop is configured as a lasso to allow the tether to draw the open downstream end of the filter body closed prior to drawing the filter body into the lumen of the delivery sheath.
5. An embolic protection device as in claim 1 , wherein the open upstream end of the filter body is defined by the periphery of the open upstream chamber.
6. An embolic protection device as in claim 1 , wherein the folded wall portion of the tubular porous mesh comprises a resiliently closed sleeve portion extending in an upstream direction from an apex of a conical opening which defines the expandable opening of the port.
7. An embolic protection device as in claim 1 , wherein the folded wall portion of the tubular porous mesh material which is configured to radially collapse to define an expandable opening of the port.
8. An embolic protection device as in claim 1 , wherein the catheter body includes at least a working catheter lumen for advancing a working catheter therethrough, into the open downstream end of the filter body, and through the port.
9. An embolic protection device as in claim 8 , wherein the catheter body further includes at least a deployment lumen which receives a tether attached to the radially collapsible support.
10. An embolic protection device as in claim 1 , wherein the port comprises a self-sealing port.
11. An embolic protection device as in claim 1 , wherein the port is spaced inwardly from each of said ends of the filter body.
12. An embolic protection device as in claim 1 , wherein the port inverts radially inwardly as other wall portions expand when released from radial constraint from the delivery sheath.
13. An embolic protection device as in claim 1 , wherein the folded wall portion forms the port with a conical opening on the downstream side.
14. An embolic protection device as in claim 1 , wherein the catheter body is configured to be pushed distally to release the filter body from constraint within the delivery sheath and to allow the filter body to radially expand and wherein the catheter body is configured to be pulled to proximally to reposition the support and filter body within the lumen of the delivery sheath.
15. An embolic protection device as in claim 1 , wherein the single-wall tubular porous mesh comprises a single layer.
16. An embolic protection device as in claim 1 , wherein the single-wall tubular porous mesh comprises two or more layers.
17. An embolic protection device, said device comprising:
a filter body comprising a tubular porous mesh having an open upstream end, an open downstream end, and a port disposed inside of the tubular porous mesh on an upstream side of the open downstream end, said port comprising an expandable opening configured to conform to at least one working catheter passing therethrough;
a radially collapsible and expandable support coupled to a periphery of the downstream end of the filter body;
a catheter body having a distal end coupled to the radially collapsible and expandable support; and
a delivery sheath having a lumen configured to receive and radially constrain the filter body;
wherein the catheter body may be distally advanced relative to the delivery sheath to release the filter body from constraint and to allow the filter body to radially expand with the support circumscribing the downstream end of the filter body and wherein the catheter body may be proximally retracted relative to the delivery sheath to pull the support and filter body back into the lumen of the delivery sheath such that the support body being drawn into the lumen; and
wherein the port comprises an inverted portion of the tubular porous mesh which is inverted radially inwardly to the inside of the filter body; and
wherein an inverted wall portion of the tubular porous mesh has a resiliently closed sleeve portion extending in an upstream direction from an apex of a conical opening which defines the expandable opening of the port.
18. An embolic protection device, said device comprising:
a filter body comprising a tubular porous mesh having an open upstream end, an open downstream end, and a port disposed inside of the tubular porous mesh on an upstream side of the open downstream end, said port comprising an expandable opening configured to conform to at least one working catheter passing therethrough;
a radially collapsible and expandable support coupled to a periphery of the downstream end of the filter body;
a catheter body having a distal end coupled to the radially collapsible and expandable support; and
a delivery sheath having a lumen configured to receive and radially constrain the filter body;
wherein the catheter body may be distally advanced relative to the delivery sheath to release the filter body from constraint and to allow the filter body to radially expand with the support circumscribing the downstream end of the filter body and wherein the catheter body may be proximally retracted relative to the delivery sheath to pull the support and filter body back into the lumen of the delivery sheath such that the support body being drawn into the lumen; and
wherein the port comprises an inverted portion of the tubular porous mesh which is inverted radially inwardly to the inside of the filter body; and
wherein the inverted wall portion forms the port with a conical opening on the downstream side.