Safely reducing abdominal/pelvic computed tomography imaging in pediatric trauma: a quality improvement initiative

Objective Intra-abdominal injury occurs in less than 15% of pediatric trauma activations but can be life-threatening. Computed tomography (CT) imaging is commonly ordered in pediatric trauma, even when intra-abdominal injury risk is low. We aimed to reduce abdominal/pelvic CT rates in children at very low risk for intra-abdominal injury requiring trauma activation at our pediatric trauma centre. Methods We implemented a quality improvement initiative using the Model for Improvement in children 0-15.99 years of age who activated a trauma response and were evaluated for intra-abdominal injury. Interventions included clinical decision support, institutional education, and individual audit and feedback. Our primary outcome was abdominal/pelvic CT rate in patients at very low risk for intra-abdominal injury. Balancing measures included CT scans ordered within 24 h of emergency department (ED) assessment and return to ED or hospitalization within 72 h for missed intra-abdominal injury. Statistical process control was used to evaluate rates over time. Results The baseline period (April 1, 2016 - November 30, 2017) included 359 trauma patients with a CT rate of 26.8% (95% CI 20.5-33.8%) in those at low risk for intra-abdominal injury. The intervention period (Dec 1, 2017-Dec 31, 2019) included 445 patients with a CT rate in low-risk patients of 6.8% (95% CI 3.2-12.6%), demonstrating an absolute reduction of 20.0% (95% CI 12.2-27.7%, p < 0.05). Interventions resulted in a significant decrease in abdominal/pelvic CT imaging corresponding with special cause variation. No clinically significant intra-abdominal injuries were missed. Conclusions This quality improvement initiative reduced abdominal/pelvic CT rates in pediatric trauma patients at low risk for intra-abdominal injury without any missed cases of significant injury. Leveraging standardized decision tools to reduce unnecessary CT imaging can be successfully accomplished without compromising care.