Abstract: Objective To evaluate the effectiveness of a clinical decision support system (CDSS) based on early warning scores in optimizing preoperative nursing care for the elderly patients with acute aortic dissection (AAD). Methods A preoperative nursing CDSS for AAD was developed, featuring modules including monitoring and assessment, risk warning, and decision support. The incidence of AAD deterioration during the preoperative waiting period, target achievement rates of heart rate, blood pressure, analgesia and sedation were recorded and compared before and after system implementation. Additionally, ICU nurses’ evaluation of the system’s effectiveness was collected and analyzed. Results After the implementation of the CDSS, the incidence rate of disease deterioration events during the preoperative waiting period was significantly decreased(P<0.05), and the target achievement rates of heart rate, blood pressure, and analgesia and sedation showed significant improvement (P<0.05). The score of the effectiveness of the system evaluated by ICU nurses was 96.84±6.36. Conclusions The CDSS based on early warning scores effectively helps the nurses identify potential risks in elderly AAD patients and provides scientific support for decision-making. The implementation of this system significantly enhances the patients’ safety during the preoperative waiting period.

Key words: clinical decision support system, early warning score, acute aortic dissection, aged, nursing care