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  • Title: Leveraging the Combined Predictive Value of Ultrasound and Laboratory Data to Reduce Radiation Exposure and Resource Utilization in Children with Suspected Appendicitis.
    Author: Anandalwar SP, Graham DA, Kashtan MA, Bachur RG, Barnewolt CE, Callahan MJ, Rangel SJ.
    Journal: J Surg Res; 2021 Jan; 257():529-536. PubMed ID: 32919343.
    Abstract:
    BACKGROUND: Previous investigation has shown that the combined predictive value of white blood cell count and ultrasound (US) findings to be superior to either alone in children with suspected appendicitis. The purpose of this study was to evaluate the impact of a diagnostic clinical pathway (DCP) leveraging the combined predictive value of these tests on computed tomography (CT) utilization and resource utilization. METHODS: Retrospective cohort study comparing 8 mo of data before DCP implementation to 18 mo of data following implementation. The pathway incorporated decision-support for disposition (operative intervention, observation, or further cross-sectional imaging) based on the combined predictive value of laboratory and US data (stratifying patients into low, moderate, and high-risk groups). Study measures included CT and magnetic resonance imaging utilization, imaging-related cost, time to appendectomy, and negative appendectomy rate. RESULTS: Ninety-seven patients in the preintervention period were compared with 319 patients in the postintervention period. Following DCP implementation, CT utilization decreased by 86% (21% versus 3%, P < 0.001). Mean time to appendectomy decreased from 8.5 to 7.2 h (P < 0.001), and the negative appendectomy rate remained unchanged (5% versus 4%, P = 0.54). Magnetic resonance imaging utilization increased following pathway implementation (1% versus 7%, P = 0.02); however, median imaging-related cost was significantly lower in the postimplementation period ($283/case to $270/case, P = 0.002) CONCLUSIONS: In children with suspected appendicitis, implementation of a DCP leveraging the combined predictive value of white blood cell and US data was associated with a reduction in CT utilization, time to appendectomy, and imaging-related cost.
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