OBJECTIVE: Despite wide belief that the duodenal organ injury scale has been validated, this has not been reported in the published literature. Based on clinical experience, we hypothesize that the American Association for Surgery of Trauma Organ Injury Scale (AAST-OIS) for duodenal injuries can independently predict mortality. Our objectives were threefold: 1) describe the national profile of penetrating duodenal injuries; 2) identify predictors of morbidity and mortality; and 3) validate the duodenum AAST-OIS as a statistically significant predictor of mortality. METHODS: Using the Abbreviated Injury Scale 2005 and ICD-9-CM E-codes, we identified 879 penetrating duodenal trauma patients from the NTDB between 2010 and 2014. We controlled patient-level covariates of age, biological sex, systolic blood pressure (SBP), Glasgow Coma Score (GCS), pulse, Injury Severity Score (ISS), and Organ Injury Scale (OIS) grade. We estimated multivariable generalized linear mixed models to account for the nesting of patients within trauma centers. RESULTS: Our results indicated an overall mortality rate of 14.4%. Approximately 10% of patients died within 24 hours of admission, of whom 76% died in the first 6 hours. Patients averaged approximately five associated injuries, 45% of which involved the liver and colon. Statistically significant independent predictors of mortality were firearm mechanism, SBP, GCS, pulse, ISS, and AAST-OIS grade. Specifically, odds of death were decreased with 10-mmHg higher admission SBP (13% decreased odds), one-point higher GCS (14.4%), 10-beat lower pulse (8.2%), and 10-point lower ISS (51.0%). CONCLUSIONS: This study is the first to report the national profile of penetrating duodenal injuries. Using the NTDB, we identified patterns of injury, predictors of outcome, and validated the AAST-OIS for duodenal injuries as a statistically significant predictor of morbidity and mortality. LEVEL OF EVIDENCE: Retrospective study, level IV. (C) 2017 Lippincott Williams & Wilkins, Inc.
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