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The inner structure of the infusion tube originates from the valve structure inside the veins that ensures the one-way flow of blood in animals. When such a valve structure is established in the infusion tube, blood backflow due to negligence can be effectively avoided. When the infusion is about to be completed, the valve will close up due to lower fluid pressure and automatically stop infusion.
In addition to medical safety, the simple structure can also largely streamline the complicated infusion steps and save human resources.