The present invention discloses devices, systems and methods for increasing blood pressure in a blood vessel by introducing an anchor within that traps a particle capable of increasing in volume as it is exposed to blood flow. As the particle increases in volume, it serves to decrease the cross sectional area of the blood vessel, resulting in decreased blood flow and increased blood pressure. This invention may be used to arterialize blood vessels in the venous system to prepare them for an exposure to arterial pressures.