Background: Despite a broad consensus and recommendations, numerous international reports or studies have shown the difficulties of implementing palliative care within healthcare services. The objective of this study was to understand the palliative approach of registered nurses in hospital medical and surgical care units and their use of mobile palliative care teams. Methods: Qualitative study using individual in depth semi-structured interviews and focus group of registered nurses. Data were analyzed using a semiopragmatic phenomenological analysis. Expert nurses of mobile palliative care team carried out this study. 20 registered nurses from three different hospitals in France agreed to participate. Results: Nurses recognize their role as being witnesses to the patient's experience through their constant presence. This is in line with their professional values and gives them an "alert role" that can anticipate a patient-centered palliative approach. The physician's positioning on palliative care plays a key role in its implementation. The lack of recognition of the individual role of the nurse leads to a questioning of her/his professional values, causing inappropriate behavior and distress. According to nurses, "rethinking care within a team environment" allows for the anticipation of a patient-centered palliative approach. Mobile Palliative Care Team highlights the major role of physicians-nurses "balance" while providing personal and professional support.