Effect of feedforward control combined with tracking method on reducing the incidence of blockage of intravenous indwelling needle in perioperative patients (前馈控制追踪法在降低围手术期患者静脉留置针堵... by ZHANG Jianfang (张建芳), SHI Lihua (施丽华), LIN Yiqing (林依青), FENG Qi (冯绮), CHEN Qiyu (陈麒羽), LI Liqin (李立勤)

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