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This is a design of infusion set. Using roller to control the velocity, switch will calculate and count down, the time needed for transfusion, according to the flow velocity. A button is set on the outside of the switch, when transfusion is completed, the button will automatically stop the transfusion process and prevent the back flow of the blood and the air. So users could finish the transfusion even when they are asleep.
Kunming University of Science and Technology