Abstract: Objective: To develop an intelligent Q&A system for day surgery patients based on the WeChat official account and evaluate its effectiveness, aiming to address the issues of low efficiency and lack of personalization in traditional health education models. Methods: The perioperative health education pathway for day surgery was outlined and analyzed to develop the intelligent Q&A system based on the LangChain framework integrated with the WeChat official account platform. A historical-control study was adopted to compare the response time, patients' readiness for discharge, and postoperative recovery quality before and after the application of the system. The answer accuracy of the system and users' satisfaction were also evaluated. Results: After the application of the system, the average response time decreased from (600.25±100.13) seconds to (7.58±0.37) seconds (P<0.001), with an answer accuracy rate of 97.5%. Patients' readiness for discharge scores improved from 90.77±13.05 to 101.77±11.07 (P<0.05), and postoperative recovery quality scores increased from 102.13±6.21 to 127.39±5.17 (P<0.05). The user satisfaction survey showed the satisfaction rate reached 92.3%. Conclusion: The WeChat official account-based intelligent Q&A system can provide efficient and accurate health guidance for day surgery patients, helping to improve their health outcomes, while offering a good user experience and demonstrating certain promotional value.

Key words: day surgery; WeChat official account; digital; health education