Arterial compliance adjustment

A method of modulating vascular flow in a patient, the method comprising:

• placing a first elongated inflatable balloon within an arterial blood vessel of anatomy of a subject, the first balloon having a sealed outer end and a fluidly-open inner end;
• spanning a distance between the arterial blood vessel and a venous blood vessel of the anatomy with a connector tube coupled to the inner end of the first balloon at a first end of the connector tube and to a fluidly-open inner end of a second elongate inflatable balloon at a second end of the connector tube;
• positioning the second balloon within the venous blood vessel;
• exposing the first balloon to systolic arterial pressure within the arterial blood vessel that is greater than a fluid pressure within the first balloon, thereby causing:
• the first balloon to compress radially inwardly to a radially-compressed deflated state, thereby forcing a portion of fluid from within the first balloon to pass through the connector tube and into the second balloon;
• and
• fluid pressure within the second balloon to increase beyond pressure in the venous blood vessel such that the second balloon expands radially outwardly from a deflated state to a radially-expanded inflated state;
• and
• transferring the portion of fluid back from the second balloon to the first balloon as venous pressure rises and radially compresses the second balloon to force the portion of fluid out of the second balloon and back into the first balloon.

A method of modulating vascular flow in a patient, the method comprising:

• placing a first elongated inflatable balloon within an arterial blood vessel of anatomy of a subject, the first balloon being shape-memory-biased to a radially-expanded state and having a sealed outer end and a fluidly-open inner end;
• spanning a distance between the arterial blood vessel and a venous blood vessel of the anatomy with a connector tube coupled to the inner end of the first balloon at a first end of the connector tube and to a fluidly-open inner end of a second elongate inflatable balloon at a second end of the connector tube;
• positioning the second balloon within the venous blood vessel, the second balloon being shape-memory-biased to a radially-compressed state;
• when the first balloon is in the radially-expanded inflated state, exposing the first balloon to systolic arterial pressure within the arterial blood vessel that overcomes a shape-memory bias force of the first balloon, thereby causing:
• the first balloon to compress radially inwardly to a tensioned radially-compressed deflated state and force a volume of fluid from within the first balloon to pass through the connector tube and into the second balloon;
• and
• fluid pressure within the second balloon to overcome a shape-memory bias force of the second balloon and expand radially outwardly from the radially-compressed state to a tensioned radially-expanded inflated state;
• and
• transferring the volume of fluid back from the second balloon to the first balloon as diastolic venous pressure rises and combines with the shape-memory bias force of the second balloon to force the volume of fluid out of the second balloon and back to the first balloon.