Limitations

1. There was no difference in the results of POD in this study. A large sample size will be used in future studies to determine the effect of preoperative analgesia on POD.2. In addition to POD, this study did not analyze the impact of prognostic indicators of patients under the new model. We look forward to finding the possible influence of analgesia mode on prognosis in future research.3. In the new mode, instant messaging software is used to enhance the convenience of information exchange, and attention should be given to protecting patient privacy and information security during use. We hope there will be specialized software in the future.