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;
• an anchor supported by the catheter and having an uncompressed configuration and a compressed configuration, the anchor comprising a proximal portion having first diameter in the uncompressed configured and a distal portion having a second diameter in the uncompressed configuration smaller than the first diameter, the proximal portion being adapted to expand toward the uncompressed configuration to engage a wall of the blood vessel, the anchor comprising a blood impermeable wall defining an adjustable blood flow path extending through the anchor from a proximal opening at a proximal end of the proximal portion to a distal opening at a distal end of the distal portion, the catheter being disposed outside of the adjustable blood flow path;
• a flow control element supported by the catheter, the flow control element comprising a cinching line adapted to change a shape of the distal portion of the anchor from a first shape to a second shape, the cinching line extending to the anchor from the catheter and being adapted to change a rate of blood flow through the blood flow path when the distal portion of the anchor changes from the first shape to the second shape;
• an anchor distal support adapted to resist movement of the distal portion of the anchor toward the catheter during actuation of the cinching line;
• and
• a blood flow control actuator disposed at a proximal section of the catheter and adapted to actuate the cinching line.