Abstract: Objective To investigate the impact of second victim experiences and support on professional self-concept among emergency department nurses after experiencing patient safety incidents incidents. Methods From November to December 2023,300 emergency department nurses from six grade-A tertiary hospitals in Hunan Province who had experienced patient safety incidents were investigated with the general information questionnaire,the Chinese version of the second victim experience and support scale,and the professional self-concept scale,and the data were analyzed. Results The second victim experience and support score for emergency department nurses was （70.01±9.72）points,and the professional self-concept score was （86.81±13.35）points. There was a negative correlation between the total score of second victim experience and support and the total score of professional self-concept among emergency department nurses in Hunan Province（r=-0.149--0.370,all P<0.01）. The factors that affected the professional self-concept of emergency department nurses were whether enjoy nursing and health status,which together explain 3.3% of the variance. Conclusion The psychological pain of the second victim and professional self-concept of emergency department nurses in grade-A tertiary hospitals in Hunan Province are at a moderate level,and the support received is average. Hospital managers should pay attention to the painful experience of emergency department nurses as the second victim,provide targeted support based on different influencing factors,and better guide their career planning and development.

Key words: Emergency department nurse, Adverse events, The second victim, Professional self-concept