Feasibility study on contactless infusion pump based on giant magnetostrictive actuator

To solve the low accuracy and poor stability problems of traditional existing infusion pumps at microflow rates, a new conceptual design based on a giant magnetostrictive actuator (GMA) is proposed. The conceptual structure and working principle of the new infusion pump are introduced. A GMA for the core device was tested experimentally. The results show that when the input current is 0.5-2 A and the preload is 200 N, the GMA can push a 1 mm standard syringe for drug delivery and the flow rate is 0.85-4.47 μl/s, satisfying the specification requirements. Compared to the existing infusion pumps, a lower flow rate shows that infusion pumps based on the GMA can transfuse under microflow conditions. It is feasible to use the GMA as a driving element to develop infusion pumps.