Background: Previous studies have identified the reverse shock index x Glasgow Coma Scale (rSIG) as a tool for predicting the need for trauma intervention in pediatric patients. This study sought to investigate the utility of prehospital rSIG as a triage tool to predict the need for trauma-center level of care in a large pediatric cohort.
Methods: Data from the American College of Surgeons National Trauma Data Bank (NTDB) (2018-2020) were used. Patients aged 1-18 with valid values for prehospital systolic blood pressure (EMS SBP), prehospital heart rate (EMS HR), and EMS total GCS, were included. Prehospital rSIG was calculated as (EMS SBP/EMS HR) x EMS total GCS. Abnormal values for rSIG were defined as: ≤13.1, ≤16.5, and ≤20.1 for patients aged 1-6, 7-12, and 13-18, respectively. Injury severity was determined by Injury Severity Score (ISS). ISS 1-8 represented minor injury, 9-15 moderate injury, and 16 severe injury. Rates of hemorrhage control surgery, embolization, transfusion at 4 hours, mechanical ventilation, ICU stay 3 days, and mortality was compared between patients with abnormal vs. normal prehospital rSIG.
Results: 120,941 patients were included in the analysis; 60269 (49.8 %) had an abnormal prehospital rSIG. Patients with abnormal prehospital rSIG had significantly higher rates of 1 trauma intervention (23.3 % vs 8.3 %, p < 0.0001) and mortality (2.7 % vs 0.1 %, p < 0.0001). When stratified by injury severity, rates of 1 trauma intervention were significantly higher for patients with abnormal prehospital rSIG in minor (2.8 % vs. 1.5 %, p < 0.0001), moderate (18.9 % vs 10.5 %, p < 0.0001), and severe injury (69.8 % vs 43.1 %).
Conclusion: Prehospital rSIG appears to be an independent predictor of both trauma intervention and mortality, regardless of injury severity, in the pediatric trauma population. Use of prehospital rSIG may prove useful in triage situations, particularly mass casualty incidents, to determine need for trauma-center care.
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