Ambulatory care sensitive conditions (ACSCs) are illnesses that can be prevented from resulting in hospitalization with timely and effective ambulatory care. As the global emphasis on improving healthcare service quality and efficiency increases, understanding the evolution and research trends of ACSCs becomes increasingly vital.

To analyze the research hotspots, frontiers, and trends in the field of ACSCs over the past 30 years.

The English literature related to ACSCs published in the Web of Science was searched in March 2023. CiteSpace was utilized to perform a visualization analysis of the publication year, authors, research institutions, keywords and references extracted from the identified articles. The time frame was set from 1992 to 2023, with each time segment spanning five years. The network node correlation strength was determined using the "Cosine" algorithm. For the analysis, "Author" "Institution" and "Keyword" were selected as nodes, resulting in knowledge maps that illustrate co-occurrence among authors, institutions, and keywords.

From an initial pool of 1 701 articles, 1 698 were ultimately selected for analysis by CiteSpace. Research focusing on ACSCs had generally shown an upward trend in recent years. The top three prolific institutions were Harvard University [81 articles (4.77%) ], University of California [63 articles (3.71%) ] and University of Michigan [47 articles (2.77%) ]. Eight topic clusters were derived from keyword cluster mapping, namely "nursing home""public health""primary care""integrated care""impact""potentially avoidable hospitalizations""management", and "performance". Citation analysis showed that highly cited studies in this field focused on the status of avoidable hospitalizations, influencing factors, healthcare relationships, and reduction strategies.

Over the past 30 years, research in the field of ACSCs has rapidly progressed and is extensively utilized by major developed nations worldwide to evaluate and improve healthcare services. However, there is a lack of cross-regional collaboration among researchers and institutions, and research interests continually evolve. The main themes include the significance and policy implications of ACSCs and hospitalization for ambulatory care sensitive conditions (ACSH), influencing factors, practical applications, and policy insights. Domestic exploration of these crucial areas is insufficient and requires more attention in the future.

门急诊服务敏感疾病（ACSCs）指通过及时有效的门急诊服务可以避免住院的疾病。随着全球对提升医疗卫生服务质量与效率的日渐关注，深入了解ACSCs的发生发展和研究动态至关重要。

分析近30年ACSCs研究领域的热点、前沿与趋势。

2023年3月，检索并分析Web of Science数据库中与ACSCs相关的英文文献，使用CiteSpace 6.1.R6信息可视化软件进行数据汇总和分析，包括发表年份、作者、研究机构、关键词和参考文献。时间跨度设置为"1992—2023年"，时间分区设置为5年。网络节点关联强度选择"Cosine"算法。根据分析主题，选择"Author""Institution""Keyword"作为节点进行可视化分析，分别得到作者、机构、关键词共现的知识图谱。

初检获得文献1 701篇，经CiteSpace识别后，最终纳入分析1 698篇。近年来关注ACSCs的研究数量总体呈现上升趋势，发文量排名前3位的机构分别是哈佛大学[81篇（4.77%）]、加利福尼亚大学[63篇（3.71%）]及密歇根大学[47篇（2.77%）]。关键词聚类图谱得到"nursing home""public health""primary care""integrated care""impact""potentially avoidable hospitalizations""management""performance"8个聚类主题。引文分析显示，ACSCs领域高被引研究重点聚焦于可避免住院的现状与影响因素、可避免住院与医疗卫生服务的关系、减少可避免住院的措施三方面。

近30年，ACSCs领域的研究迅速发展，目前已被世界主要发达国家广泛用于评估和改进医疗卫生服务。然而，研究者和机构之间缺乏跨区域合作，研究热点随时间演进不断变化，主题涵盖ACSCs及门急诊服务敏感疾病住院（ACSH）的研究意义与政策含义、影响因素、实践应用和政策启示四大类。国内对这些关键领域的探讨不足，未来需给予更多关注。