Devices and methods for restricting flow in vessels and removing material from vessels

A device comprising:

• a catheter having a distal catheter end and defining a catheter lumen;
• and
• a containing element coupled to the catheter, wherein the containing element is configured to be deployed from the distal catheter end of the catheter and includes an outer wall portion including:
• an inner layer defining an inner chamber in communication with the catheter lumen;
• and
• an outer layer coupled to the inner layer such that, when the containing element is deployed from the catheter, the inner layer and the outer layer form a distal folded edge defining a distal opening of the containing element in communication with the inner chamber;
• wherein the outer layer is configured to form a proximally concave surface when the containing element is deployed from the distal catheter end.

A system comprising:

• an aspiration source;
• a delivery catheter;
• a catheter disposed within the delivery catheter, wherein the catheter includes a distal catheter end and defines a catheter lumen in fluid communication with the aspiration source;
• a containing element coupled to the catheter, wherein the containing element is configured to be deployed from the distal catheter end of the catheter and includes an outer wall portion including:
• an inner layer defining an inner chamber of the containing element in communication with the catheter lumen;
• an outer layer coupled to the inner layer such that, when the containing element is deployed from the catheter, the inner layer and the outer layer form a distal folded edge defining a distal opening of the containing element in communication with the inner chamber;
• and
• a membrane configured to restrict flow through the outer wall portion;
• and
• a control element extending through the catheter lumen and coupled to the containing element, wherein the control element is longitudinally movable relative to the catheter to selectively collapse the inner chamber defined by the inner layer when the containing element is deployed.