Objective To study the diffusion mode and characteristics of large medical equipment allocation and use management policies among different institutions or regions,so as to provide reference for the improvement of policies.Methods The policies on the allocation and use management of large medical equipment released from Janu-ary 1994 to December 2022 were searched on the official websites of the central government,local governments,and health commissions,and databases such as"Peking University Magic".Based on the theory of policy diffu-sion,It analyzed the diffusion characteristics,diffusion mode and influencing factors of large medical equipment allo-cation and use management policy in combination with factors such as policy diffusion intensity,diffusion width,dif-fusion speed,and diffusion direction,and through the policy network analysis identified interrelationships between policies across agencies or across regions.Results It included 161 policy documents for analysis,including 25 central policies and 136 local policies.The development of large medical equipment allocation and use management policies in China can be divided into four periods.The policies with high diffusion intensity,breadth and fast diffusion speed were mainly policy documents such as large medical equipment allocation plan and management measures issued by the National Health Commission,and at the same time,the"top-down"policy vertical diffusion modelwas the main one.Conclusion There were differences in the diffusion effects of large medical equipment allocation and use management policies at different stages,and the policy diffusion effect was obvious in the innovation and develop-ment period.It found that policy diffusion was affected by factors such as the division of administrative powers and responsibilities,and policy types.

Objective:To analyze the current allocation situation and equity of Class B large medical equipment in China,and provide references for reasonably optimizing the allocation of medical equipment.Methods:Based on the allocation data of Class B large medical equipment in China at the end of the 13th Five Year Plan period,the agglomeration degree method was used to evaluate the equity of equipment allocation in various regions from the dimensions of geography,population,and economic development.Results:The current allocation of Class B large medical equipment per million population was 3.19,and the eastern region(3.64)was higher than the central region(3.42),the central region(2.24)was higher than the western region.The agglomeration degree of medical equipment based on geographical area showed that most of the equipment in the eastern region was in a rich state,and the allocation equity was relatively good in the central region,but generally poor in the western region.The agglomeration degree of medical equipment based on population distribution was higher in the eastern region than in the central region and even higher in the western region.The equipment in the eastern region could basically meet the demand of the local population,while the allocation in the central and western regions was slightly insufficient.The distribution of medical equipment agglomeration degree based on economic development varied significantly among different regions,and the allocation equity of central region was generally better than that of eastern and western regions.Conclusion:The total allocation of Class B large medical equipment in China is not high,and the government needs to continue planning and improving it.The distribution of medical equipment allocation based on geography,population and economic development is unbalanced among the eastern,central and western regions.Improving the equity of medical equipment allocation also needs to consider regional differences and characteristics according to local conditions.