Double baffle vascular occluder

An assembly for occluding a body vessel including:

• a delivery catheter having a distal end;
• and
• a vascular occluder comprising:
• first and second baffle members, each baffle member including an annular expansion device and a membrane extending across the expansion device, one of the first and second baffle members being substantially impermeable to blood flow therethrough and the other of the first and second baffle members being permeable to blood flow therethrough, and
• at least one spacer element disposed between the first and second baffle members, the at least one spacer element being biased to hold the first and second baffle members at a distance from one another so as to provide a chamber between the first and second baffle members;
• wherein the first baffle member includes an opening for removably receiving a delivery catheter;
• and
• wherein the delivery catheter is configured to be coupled through the first baffle member to the chamber.

A vascular occluder including:

• first and second baffle members, each baffle member including an annular expansion device and a membrane extending across the expansion device, the second baffle member being substantially impermeable to blood flow therethrough and the first baffle member being permeable to blood flow therethrough, and
• at least one spacer element disposed between the first and second baffle members biased to hold the first and second baffle members at a distance from one another so as to provide a chamber between the first and second baffle members;
• wherein the first baffle member includes an opening for removably receiving a delivery catheter, and
• wherein the membrane of the second baffle member is unitary across the expansion device across which it extends.