Objective:To analyze the grid management strategy of medical alliances in Rizhao city, Shandong province, and to provide references for improvement of this policy.Methods:In August 2020, semi-structured interviews were conducted with 31 managers of three medical alliances in Rizhao city, regarding the objectives, specific measures, problems and influencing factors of the grid layout of the medical alliances. The grounded theory was used to sort out the interview data, along with the Mazmanian-Sabatier model for further analysis.Results:The analysis resulted in 8 main categories and 19 sub-categories, including theoretical and technical support, target group characteristics, policy causality theory, current status of policy directives, inter-agency relations, socioeconomic conditions and technology, public attitudes, and media campaigns. On this basis, a theoretical framework for the implementation of the grid layout of medical alliance was formed based on the Mazmanian-Sabatier model.Conclusions:The socio-economic conditions and technologies for implementing the grid-based management of medical alliances in Rizhao city were relatively mature, enjoying strong public support and good social response. But on the other hand, there were still such problems as unclear policies, imperfect mechanisms for synergy of interests among different subjects, and incomplete supporting policies. In the future, it is expected to form a policy implementation synergy, introduce supporting policies and strengthen primary teams building, in order to ensure the orderly promotion and long-term implementation of the policy.

Objective To investigate the effects of evidence-based nursing on the psychological status,operation associated complications and short-term prognosis of patients with intracranial aneurysms after interventional embolization.Methods A total of 150 patients undergoing elective interventional embolization in the hospital from May 2012 to May 2016 were randomly divided into the control group and the observation group with 75 patients each.The control group were given routine nursing care while the observation group were given evidence-based nursing.The incidence of operation associated complications and postoperative cerebral vasospasm were compared between the two groups.The changes in scores of the Self-Rating Anxiety Scale (SAS),Self-Rating Depression Scale (SDS),Somatization Symptom Checklist (SCL-90) and Glasgow Outcome Scale (GOS) before and after intervention were compared.Results No postoperative cerebral vasospasm was observed in the observation group,and the incidence of operative complications was 4％.In the control group,cerebral vasospasm occurred in 7 cases,and the incidence of operative complications was 17.3％.Before discharge,SAS score (42.26 ± 3.77) and SDS score (40.67 ± 6.44) in the observation group were lower than those in the control group (t=8.478,4.507;P ＜ 0.001).No death cases in these two groups.Three months later after operation,patients with GOS grade 5 in the observation group was 30.67％,and it was 13.33％ in the control group.There was significant difference of GOS classification between the two groups (H=15.520,P ＜ 0.01).Conclusions Evidencebased nursing can help reduce the incidence of cerebral vasospasm after interventional embolization in patients with intracranial aneurysms,improve their anxiety and depression,and optimize short-term prognosis.