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目的：为临床合理应用盐酸左氧氟沙星注射液提供依据。方法：以盐酸左氧氟沙星注射液的说明书、《抗菌药物临床应用指导原则》等为依据，在查阅相关文献的基础上制定基于加权TOPSIS法的盐酸左氧氟沙星注射液药物利用评价细则，并据此对某院2014年上半年的100份使用盐酸左氧氟沙星注射液的归档病历进行用药合理性评价。结果：100份病历中，相对接近度大于70％的有51例（占比为51.0％）；相对接近度在50％～70％区间的有37例（占比为37.0％）；相对接近度在30％～50％区间的有12例（占比为12.0％）。结论：基于加权TOPSIS法制定的盐酸左氧氟沙星注射液药物利用评价方法可以用于该药的药物应用合理性评价，并使得评价行为规范合理；评价结果提示该院盐酸左氧氟沙星注射液的不合理使用现象较为普遍，应加强管理。“,”OBJECTIVE:To provide reference for rational application of Levofloxacin hydrochloride injection in the clinic. METHODS:With reference to the package insert of Levofloxacin hydrochloride injection,the guiding principles of clinical use of antibiotics,by reviewing related literatures,based on the weighted TOPSIS methods,detailed rules for drug utilization review (DUR) of Levofloxacin hydrochloride injection were made. And then 100 archived medical records of Levofloxacin hydrochloride injection in the first half of 2014 were evaluated in respect of medication rationality based on these rules. RESULTS:Among 100 cases,relative proximity of 51 cases was more than 70%(51.0%);that of 37 was between 50%-70%(37.0%);that of 12 cases was between 30%-50%(12.0%). CONCLUSIONS:Established DUR method of Levofloxacin hydrochloride injection on the basis of weighted TOPSIS methods can be used to evaluate the rationality of drug use and promote more rational evaluation behavior. And the results indicate that unreasonable use of Levofloxacin hydrochloride injection is still common in the hospital.