Rib fractures are a common injury in blunt chest trauma and are associated with significant risk of morbidity and mortality [1]. Previously triage scoring system, Rib Injury guidelines (RIG), decreases length of stay (LOS) and intensive care (ICU) admission rates in large level one trauma centres [2]. Tauranga is a level 3 trauma centre. The Stumbl (STUdy of the Management of BLunt chest wall trauma) scoring system was introduced to triage all patients with blunt chest trauma in 2023. The Stumbl scoring system is based upon the patient's age, number of fractures, physiological parameters and comorbidities. Inclusion criteria, patients with blunt chest trauma from 1 January 2021 to 30 December 2023. A total of 160 patients were identified from the trauma database. 100 from 2021-22 and 60 from 2023, after the implementation of the Stumbl scoring system. The two groups had similar comorbidities. The only positive outcome that had met statistical significance was PCA prescribing rate (61.3% vs 23% p-value is <0.01). ICU admission rates (13% vs 30% p-value 0.28), complication rates (18% vs 20% p-value 0.8) and failed discharge rates (5% vs 8% p-value 0.48) were also lower but did not meet statistical significance. However, the introduction of the Stumble system increased the median LOS in hospital by a day (3 day vs 4 day p-value 0.01) and in ICU LOS by 2.5 days (5 days vs 2.5 day P-value 0.024) and was statistically significant. References 1 Ziegler D.W., Agarwal N.N.: The morbidity and mortality of rib fractures. J Trauma 1994; 37: pp. 975-979. C. Butts, P Miller, A Nunn, A Nelson, et al 2 RIB fracture triage pathway decreases ICU utilization, pulmonary complications and hospital length of stay Injury Volume 52, 2021, P 231-234