Ultrasound-powered electrolytic pump for remote-controlled drug delivery

Ultrasound powering - micropump - electrolysis = drug delivery

Piezoelectric receiver feeds AC signal to a full-wave rectifying circuit to create a constant DC voltage for electrolysis.
The electrolytically-generated gas pressure will be accumulated for pumping the drug out.
Flow rate of 0.1 μL/s with a backpressure of 24.2 Torr.