Background: Trauma represents a growing health burden in Aotearoa New Zealand, with over 2,500 individuals sustaining injuries requiring hospital admission annually, and rates trending upwards. While advances in trauma systems have improved survival, psychological sequelae such as PTSD remain under-recognised in routine care. International evidence indicates approximately one in four trauma survivors develops PTSD. PTSD is associated with poorer outcomes, including prolonged hospital admission, increased complications, repeat admissions, and delayed return to work. Māori experience a disproportionate burden of both trauma and mental health conditions, highlighting the importance of culturally safe approaches to post injury care. Methods: The TRAUMATIC screening tool was developed using evidence from three systematic reviews and stakeholder engagement. Predictors consistently associated with PTSD risk following injury, including prior mental health conditions, substance abuse, intentional injury, ICU admission and demographic factors, were structured into a nine-item checklist using the acronym TRAUMATIC. A score of greater than three identifies patients at high risk. Concurrently, the ITSS was adapted to plain-language phrasing to improve clarity and bedside acceptability. Development was guided by the Consolidated Framework for Implementation Research and the Equity-based Framework for Implementation Research, ensuring alignment with Te Tiriti o Waitangi and whānau-centred care. Stakeholder input from clinicians, Māori research advisors, people with lived experience and their whānau informed wording. Conclusion: The TRAUMATIC screening bundle represents a feasible, equity-informed approach to early PTSD risk identification in trauma care. Integration into established workflows supports acceptability. Formal validation and adequate resourcing of referral pathways are required prior to widespread implementation to ensure meaningful benefit for patients and whānau.