A
bottle stopper puncture outfit is arranged at the upper end of an infusion tube, an injection needle is installed at the lower end of the infusion tube, a Murphy's dropper is arranged on the infusion tube close to an
air filter, a
medicine adding tube is arranged at the upper end of the Murphy's dropper, and a fluid director is arranged in the Murphy's dropper. The fluid director comprises a fluid director body and a membrane flap which are connected with each other, the periphery of the fluid director body is hermetically connected with the inner wall of the Murphy dropper, a fluid guide port is formed in the middle of the fluid director body, the membrane flap is provided with a narrowed channel below the fluid director body, and the channel is communicated with the fluid guide port to form a fluid guide channel; the diversion channel is opened when liquid flows into the upper part, and is sealed and closed when no liquid flows into the upper part; when the liquid level is lower than a preset value, the upper part and the lower part are isolated through the flap seal, blood return is avoided, and the
buzzer sounds to remind
medical staff; a filter membrane is arranged on the pipeline to purify the liquid
medicine; the external infusion tube is arranged on the pipeline, so that quick
medicine injection and color distinguishing are facilitated, quick
medical care identification is facilitated, and the working efficiency is improved.