目的 探索利用信息化手段优化随访患者的复诊流程。方法 以上海市胸科医院为例，从关键方法、技术架构、功能 模块等方面阐述基于患者主索引的“复诊一日通”信息系统建设，选取对照组和观察组进行对比，分析系统应用效果。 结果 系统上线半年内共提供7422例随访登记服务，观察组5个科室的复诊耗时均显著低于对照组，差异有统计学意义 （t=-19.34、-27.39、-39.84、-48.15、-56.77，P<0.001），实现了长三角异地患者当日往返的复诊模式。结论 随着医院数字 化转型工作的推进，医疗服务效能将进一步得到提升。

Objective To explore the use of information methods to optimize the follow-up process of patients. Methods Taking Shanghai Chest Hospital as an example, the construction of the “follow-up visit within one day” information system based on electric main patient index was described from the aspects including key methods, technical architecture and functional modules. The application effect was analyzed by comparison between the control group and the observation group. Results Within half a year after the launch of the system, a total of 7422 cases of follow-up registration service were provided. The time of follow-up visit of 5 outpatient departments in the observation group was significantly lower than that in the control group, and the difference was statistically significant (t=-19.34, -27.39, -39.84, -48.15, -56.77; P<0.001), realizing the follow-up visit within one day mode of longdistance patients in the Yangtze River Delta. Conclusion With the advancement of hospital digital transformation, medical service efficiency will be further improved.