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PREVALENCE OF CHEST TRAUMA, ASSOCIATED INJURIES AND MORTALITY: A LEVEL I TRAUMA CENTRE EXPERIENCE



Abstract

Our aim was to investigate the incidence and outcome of chest injuries after blunt trauma in patients admitted in a level I trauma centre over a 6-year period. This is a review of prospectively collected data (1996–2002); part of the (TARN-UK) data. Patients divided in 6 subgroups based on the chest AIS. Univariate analysis identified factors predicting mortality and a backward stepwise logistic regression multivariate analysis determined relationships with outcome.

There were 1,164 patients with chest injuries. The mean overall severity of chest injuries was 3.15+/−1.01. The commonest mechanism of injury was RTAs (57.01%). Rib fractures were the most common injuries (395 patients, 34%) associated with lung contusions in 12.9%. Admission GCS was highest in chest-AIS subgroup 2 and was significantly higher in groups 1 and 3. Complications, invasive operations, and investigations were more common with increasing chest-AIS. The ICU-admissions and the mean length-of-stay were similar for chest-AIS1 and 2, but significantly higher for the rest. Half of the AIS1 patients had associated head injuries; the lowest percentage was in subgroup 2 (18.8%). There was a variable correlation of abdominal injury severity with severity of chest injury. There was a significant difference in mortality rates between group 2 and group 1 and -3. The average time to death in those with chest-AIS1 was significantly lower than the average time in those with AIS4 and 5.

Patients in the higher AIS groups had both a higher overall ISS and mortality rate. Minimal chest injury severity (AIS1) showed higher ISS and significantly higher mortality compared with chest-AIS2,3. This has been attributed to the fact that the chest is spare as most of the impact during the course of the accident is been absorbed by the head (head injury). This theory also explains the shorter time period of death seen in patients belonging to the chest AIS1 group.

Correspondence should be addressed to Editorial Secretary Mr ML Costa or Assistant Editorial Secretary Mr B.J. Ollivere at BOA, 35–43 Lincoln’s Inn Fields, London WC2A 3PE, England; Email: mattcosta@hotmail.com or ben@ollivere.co.uk