Durable implantable non-obstructive venous assist device for support of cavopulmonary fontan circulation

A circulation assist device comprising;

• an inlet, an outlet, a central longitudinal axis extending between the inlet and the outlet, and a central lumen extending between the inlet and the outlet along the central longitudinal axis,
• a stator having at least one stator coil,
• a rotor positioned radially inward of the stator, the rotor having at least one rotor magnet,
• a stationary impeller housing positioned radially inward of the rotor, and
• an impeller positioned radially inward of the impeller housing, the impeller driven by rotation of the rotor, the impeller comprising at least one impeller blade and at least partially defining a lumen of the circulation assist device,
• wherein the impeller is configured to minimize a forward static pressure drop between the inlet and the outlet of the circulation assist device when the impeller is stationary, such the forward static pressure drop approximates the pressure drop between the inferior vena cava and central pulmonary artery of the unassisted Fontan circulation,
• wherein activation of the at least one stator coil causes rotation of the rotor relative to the stator, thereby driving rotation of the impeller, and
• wherein the impeller and the rotor rotate with respect to the stationary impeller housing and the stator.