Objective  To visually analyze the current situation and development trends of the research on hospital acquired pneumonia based on bibliometrics, and to provide reference for future research in this field.

Methods  The literature related to hospital acquired pneumonia in CNKI, Wanfang Data, VIP and Web of Science was searched from the establishment of the databases to December 31, 2024. CiteSpace 6.3.R1 software was used to visually analyze the number of publications, institutional and author cooperation, and keywords.

Results  A total of 2 908 articles were included. The analysis of the number of publications showed that the research field of hospital acquired pneumonia was in a period of slow development. This field has formed a research team represented by Liu Zhaohui, Fang Xiangqun, Yu Xingqun, Antoni Torres, Rodrigo Jimenez-garcia, Valentin Hernandez-barrera etc. Most of the domestic research institutions have regional and local cooperation, while the international hospital acquired pneumonia research has formed a mature cross-regional collaborative cooperation framework. Keywords and cluster analysis results showed that the research focus in this field mainly focused on the diagnostic strategy of hospital acquired pneumonia, the rational application of antimicrobial drugs, and the prevention of multi-drug resistant bacteria.

Conclusion  In recent years, the research popularity in the field of hospital acquired pneumonia has decreased. In the future, attention should be paid to strengthening exchanges and cooperation among research institutions, and improving the international influence of research, so as to provide reference for the future development of this field.

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