Device and method for variable blood flow occlusion

A blood flow control device comprising:

• a catheter adapted to be advanced into a blood vessel to a blood flow control site within the blood vessel, the catheter including a lumen disposed therein in communication with a port in a sidewall of the catheter;
• an expandable anchor supported by the catheter, the expandable anchor being adapted to expand to engage a wall of the blood vessel, the expandable anchor comprising a blood impermeable wall defining an adjustable blood flow path extending through the expandable anchor from a proximal opening to a distal opening, the catheter being entirely disposed outside of the adjustable blood flow path, the expandable anchor further comprising at least one catheter attachment element slidably disposed within the lumen via the port and configured to permit at least one end of the expandable anchor to move longitudinally with respect to the catheter when the expandable anchor expands or collapses;
• and
• a flow control element supported by the catheter, the flow control element being adapted to change a dimension of the adjustable blood flow path to change a rate of blood flow through the adjustable blood flow path.