(1) Background: The Covid-19 pandemic has put our healthcare systems to the test, exposing their vulnerability and demanding a high degree of commitment and dedication from healthcare teams to confront and contain the disease. In this sense, nursing professionals have played a prominent role in the treatment of complex cases that have required hospitalisation and have manifested pre-existing health complications or mortality. This unprecedented situation made it difficult to regulate the emotional impact and manage grief, often turning it into a traumatic grief whose psychological and emotional manifestations are increasingly evident but very little researched in the current context. (2) Purpose: Validation of the definition, defining characteristics and related factors for the proposal of the nursing diagnosis of professional traumatic grief. (3) Method: Based on Fehring’s content validation model, the label name, defining characteristics and other related factors were agreed upon by Spanish experts. (4) Results: The content validity index was 0.9068. A total of 21 defining characteristics were validated by the experts, as all of them scored above 0.6. With respect to the related factors of the proposed 10, all were validated. (5) Conclusion: The present study supports the proposal to develop a nursing diagnosis for professional traumatic grief. The use of standardised language is only the first step in establishing professional traumatic grief as a diagnostic category.

The COVID-19 pandemic has caused a series of biopsychosocial repercussions among nursing professionals. The impossibility of anticipating the events, the numerous deaths, the excessive workload, the lack of personal health and the necessary means of protection made it difficult to regulate the impact and the elaboration of grief to the point of becoming, on many occasions, a traumatic grief whose physical and psychological manifestations are becoming more and more evident. The main objective of this research was to develop a scale for a group of symptoms based on professional traumatic grief. The development consisted of two phases: (I) instrument design through a literature review and focus groups of bereavement experts and healthcare professionals who experience the grief process in their work; and (II) validation of the content of the instrument. A total of 25 final items were established as suitable for inclusion in the instrument. It is expected that the experiences and results obtained through the development and validation of a scale of specific symptomatology of professional traumatic grief in health professionals will allow the assessment and detection of symptomatology in order to develop programs and strategies for early intervention and prevention.