Active valves, i.e. actuated by an external force

Full Title

Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance (heart stimulation A61H31/00; heart stimulators for electrotherapy A61N1/362) > Constructional details other than related to driving > of implantable pumps or pumping devices > Valves > Active valves, i.e. actuated by an external force