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For the nurse cannot always look after the patients when they are doing a transfusion, there are some hidden dangers. If the transfusion is coming to an end but the patients are not aware of this fact ,which means the syringe needle is not out timely, the blood would flow backwards and some hazard might happen. Transfusion-Assistant which was clamped on the Murphys Dropper ,can solve the problem by using the infrared to detect the drop level. It will turn red and make a warning sound as long as the level reaches the caution point. Moreover, It can be reused.
Hu Nan University
Xu Jiayang Zhang Haolin Cai Zhiwen Ding Kebi