基于部件寿命Weibull分布的呼吸机预防性维护策略研究  

Research on preventive maintenance strategy of ventilator based on Weibull distribution of component life

作　　者：李濛扬 石子鸣 张萌[1] 徐雪萍 卢东生[1] LI Meng-yang;SHI Zi-ming;ZHANG Meng(Division of Medical Engineering,Beijing Friendship Hospital,Capital Medical University,Beijing 100050,China;不详)

机构地区：[1]首都医科大学附属北京友谊医院医学工程处,北京100050

出　　处：《中国医学装备》2023年第7期143-149,共7页China Medical Equipment

摘　　要：目的:探讨基于部件寿命威布尔(Weibull)分布的呼吸机预防性维护策略在提高呼吸机使用安全性、有效性和可靠性中的效果。方法:分析医院呼吸机使用现状及呼吸机预防性维护工作中的不足,利用Weibull分布对呼吸机易损部件维护数据统计整理并进行可靠性分析,评估部件寿命可靠性分布,掌握设备关键部件运行状态,找准预防性维护中的关键点,改进呼吸机预防性维护策略,对比预防性维护策略改进前(2018年)、改进后(2019年)呼吸机的报修数量。结果:空气和(或)氧气过滤器组、呼气隔膜、流量传感器、氧气传感器和蓄电池5种部件为呼吸机易损易耗部件,参照Weibull分布分析呼吸机部件寿命,改进预防性维护计划后,呼吸机5种易损部件更换周期长于厂家建议周期,报修数量由预防性维护改进前的81次降低为改进后的50次。结论:基于部件寿命Weibull分布的呼吸机预防性维护改进策略,加强了呼吸机预防性维护效果,能够明显降低呼吸机故障报修次数,提高呼吸机使用效率,保障呼吸机平稳安全有效运行。Objective:To explore the effect of preventive maintenance strategy of ventilator based on Weibull distribution of component life in improving the safety,effectiveness and reliability of ventilator.Methods:The current situation of the use of ventilators in hospital and the deficiencies in preventive maintenance of ventilators were analyzed.Weibull distribution was used to statistically analyze the maintenance data of vulnerable ventilator components and the reliability analysis was conducted,the reliability distribution of the components was evaluated,the running status of the key components of the ventilator was grasped,the key points in the preventive maintenance were identified,and the preventive maintenance strategy of the ventilator was improved.The number of ventilator repair requests before(2018)and after(2019)the improvement of preventive maintenance strategy improvement were compared.Results:The air and(or)oxygen filter set,expiratory diaphragm,flow sensor,oxygen sensor and battery were vulnerable and consumable parts of the ventilator.The life of the ventilator components was analyzed according to Weibull distribution.After the preventive maintenance plan was improved,the replacement cycle of the five vulnerable components of the ventilator was longer than the cycle recommended by the manufacturer.The number of repair requests decreased from 81 before the improvement of preventive maintenance to 50 after the improvement.Conclusion:The improvement strategy of preventive maintenance of ventilator based on Weibull distribution of component life strengthens the effect of preventive maintenance of ventilator,can significantly reduce the number of ventilator fault repairs,improve the use efficiency of ventilator,and ensure the stable,safe and effective operation of ventilator.

关 键 词：威布尔(Weibull)分布 预防性维护 可靠性 故障率 

分 类 号：R197.39[医药卫生—卫生事业管理]