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Objective@#To establish a risk assessment system for the prevention and control of infectious diseases in primary and secondary schools in Tianjin and reduce the risk of infectious disease prevention and control through risk assessment and control.@*Methods@#Based on the failure modes and effect analysis method, a quantitative risk assessment of infectious disease prevention and control in 45 primary and secondary schools in Tianjin was carried out. Risk based supervisory process was assessed, while control effect was evaluated for contined improvement in the prevention and control of infectious diseases in the primary and secondary schools.@*Results@#The top three risk aspects found in the infectious disease prevention and control system in primary and secondary schools in Tianjin included failure to provide sanitation professionals (82.22%) in accordance with regulations, no hand sanitizer or disinfectant (35.56%) in wash basins, and drinking water related products without approval (28.89%). The results of the risk assessment indicated that the three risk aspects with the highest risk priority number (RPN) included failure to provide health professionals( n = 144), no morning and afternoon inspection arrangement( n =126), and low quality of morning and afternoon inspections( n =126). After optimizing the supervision measures for the risk aspects with a detectable degree≥7 points, a quantitative risk assessment was carried out again, the RPN values of all risk points fell below 125, indicating reasonable control effect.@*Conclusion@#Based on the failure mode and effect analysis method, the establishment of a risk assessment system for the prevention and control of infectious diseases in primary and secondary schools and regular risk assessments can timely detect risk aspects in the infectious disease prevention and control, to promote effective prevention of infectious diseases in schools.
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Through literature method,expert consultation method,K-means algorithm and empirical analysis method,the paper analyzes the methods for evaluation on the layout of first-aid sites,discusses the indexes for scientific evaluation on the rationality of layout of first-aid sites,conducts visualized and practical calculation based on the first-aid related data of Wuhan city in 2015,verifies the rationality and operability of the evaluation indexes,and provides reference for overall allocation of first-aid resources and rational layout of first-aid sites.
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<p><b>UNLABELLED</b>The aim of this study is to investigate the characteristics of Elekta delivery system for volumetric modulated arc therapy (VMAT). Five VMAT plans were delivered in service mode and dose rates, and speed of gantry and MLC leaves were analyzed by log files. Results showed that dose rates varied between 6 dose rates. Gantry and MLC leaf speed dynamically varied during delivery.</p><p><b>CONCLUSION</b>The technique of VMAT requires linac to dynamically control more parameters, and these key dynamic variables during VMAT delivery can be checked by log files. Quality assurance procedure should be carried out for VMAT related parameter.</p>
Subject(s)
Humans , Particle Accelerators , Radiotherapy Dosage , Radiotherapy, Intensity-Modulated , MethodsABSTRACT
The air-oxygen mixer,electromagnetic coil,pneumatic control valve and other key components and the basic working principle in E-150 ventilator internal are expounded to carry out an in-depth site analysis of high incidence of failure,and maintenance of the main points are introduced.
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From strengthening metrology management of medical equipment to enhance use safety of medical equipment, security testing, maintenance work and other aspects, the question of occupation function of BE is expounded and the work development direction is discussed.