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Objectives: To describe population based trends and clinical characteristics of injury related presentations to Emergency Departments (EDs)., Design and Setting: A retrospective, descriptive analysis of de-identified linked ED data across New South Wales, Australia over five calendar years, from 2010 to 2014., Participants: Patients were included in this analysis if they presented to an Emergency Department and had an injury related diagnosis. Injury severity was categorised into critical (triage category 1-2 and admitted to ICU or operating theatre, or died in ED), serious (admitted as an in-patient, excluding above critical injuries) and minor injuries (discharged from ED)., Main Outcome Measures: The outcomes of interest were rates of injury related presentations to EDs by age groups and injury severity., Results: A total of 2.09 million injury related ED presentations were analysed. Minor injuries comprised 85.0%, and 14.1% and 1.0% were serious and critical injuries respectively. There was a 15.8% per annum increase in the rate of critical injuries per 1000 population in those 80 years and over, with the most common diagnosis being head injuries. Around 40% of those with critical injuries presented directly to a major trauma centre., Conclusion: Critical injuries in the elderly have risen dramatically in recent years. A minority of critical injuries present directly to major trauma centres. Trauma service provision models need revision to ensure appropriate patient care. Injury surveillance is needed to understand the external causes of injury presenting to hospital., (Copyright © 2016 Elsevier Ltd. All rights reserved.)

Introduction: Trauma data collection by UK hospitals is non-mandatory and data regarding trauma mortality are deficient. Our aim was to provide a contemporary description of mortality in a maturing trauma-receiving hospital serving an inner-city population., Methods: A prospectively maintained registry was analysed for demographics; injury mechanism; and time, location and cause of death in trauma patients admitted via the Emergency Department between 2004 and 2008., Results: 4986 trauma team activations yielded 4243 complete cases. The number of patients rose from 784 in 2004-2005 to 1400 in 2007/8. 302 (7%) of these died. All-cause mortality fell from 8.8% to 5.8% (p=0.0075). Blunt trauma (predominantly falls from height and road traffic collisions) accounted for 79% of admissions but 87% of mortality. Penetrating trauma accounted for 21% of admissions and 13% of mortality. Most penetrating injury deaths were from stabbing injury (31/40) as opposed to gunshot wounds (8/40). The biggest cause of death was central nervous system injury (47.7%) followed by haemorrhage (26.2%). Penetrating injury death was associated with marked shock and acidosis compared to blunt mechanisms--mean (SD) admission systolic blood pressure 25.4 (45.7) versus 105.5 (60.5) mm Hg; mean (SD) base excess -21.84 (7.2) versus 9.71 (8.45) mmol, respectively. No classical trimodal distribution of death was observed., Conclusion: Despite current focus on death from knife and gun crime, the vast majority of trauma mortality arises from blunt aetiology. Maturation of our systems of care has been associated with a drop in mortality as institutional trauma volumes increase and clinical infrastructure develops.