P266 B-lines score on lungultrasound as a direct measure of respiratory dysfunction In PICU patients with severe polytrauma

Purpose Fluid overload is frequently found in critically ill pediatric patients with severe polytrauma (SP) and is associated with adverse outcomes. Lungultrasonography (LU) and bioimpedance spectroscopy (BIS) are potentially useful tools for the noninvasive volume assessment. We evaluated the utility of these measures, alone or in combination, in estimating the PaO2/FiO2 ratio in critical pediatric patients with SP . Methods In a prospective pilot observational study we included 23 patients who presented on admission or developed at any time during intensivecare unit stay SP. Patients were studied at baseline and after 48 h with LU, BIS and arterial blood gas. Results In the univariable analysis, the PaO2/FiO2 ratio was negatively correlated with the B-lines score, and this association was maintained even after adjustments. A cutoff value of 17 for the B-lines score has a sensibility of 73,91% and a specificity of 69, 23% in identifying patients with PaO2/FiO2 Conclusion LU can be used for functional lung evaluation and identification of pediatric patients with increase pulmonary water content and decrease PaO2/FiO2 ratio.