RÉSUMÉ
Objective To explore the psychological experience of ICU nurses who had worked follow different work patterns, and find the most appropriate staffing model. Methods A phenomenological approach of qualitative research was conducted in 5 ICU nurses by intensive interview,then the data collected were read, analyzed, reflected,finally the theme was got. Results In the work pattern of shifted every 12 hours, with low work frequency and strong feeling of fatigue. In the work pattern of shifted every 8 hours, with high work frequency and the disadvantage of nurse- patient relationship. In the short-time continuous APN work pattern, with continuous management of patients' condition, promotion of nurse-patient relationship, improvement of doctor-nurse relationship, comparatively stable biological clock. Conclusions The short-time continuous APN work pattern can concentrate nurses' work and rest time, relieve the press that caused by the shifted work, at the same time, promote the patients',patients' family and doctors' satisfaction degree with nursing work, increase nurses' effect in the ICU team, guarantee the quality of care, eventually ensure the patients' safety.