Is lung ultrasonography a useful method to diagnose children with community‐acquired pneumonia in emergency settings?

Background: Lung ultrasonography is a new method for diagnosing community‐acquired pneumonia. Lung ultrasonography has some advantages over chest X‐ray, such as lack of ionizing radiation risk, bedside performance, and cost‐effectiveness. Objectives: In this study, we aimed to determine the feasibility of lung ultrasonography in emergency settings in children with community‐acquired pneumonia. Methods: The study included patients younger than 18 years of age with suspicion of community‐acquired pneumonia. On the first evaluation, patients with positive clinical and/or chest X‐ray findings were defined to have community‐acquired pneumonia, and this was accepted as the gold standard. The chest X‐rays were evaluated by the chief of the pediatric emergency department, who was blinded to the patients and the lung ultrasonography results. Lung ultrasonography was performed by another pediatric emergency physician who was also blinded to the chest X‐ray results and clinical findings such as fever, respiratory distress, rales, and wheezing. Results: Of the 91 patients enrolled, 71 (78.0%) were diagnosed with community‐acquired pneumonia based on clinical and chest X‐ray findings. The median (interquartile range) duration of the lung ultrasonography procedure was 4.0 (3.5–6.0) min. Shred sign, air bronchogram, and hepatization were significantly more frequent in the patients with community‐acquired pneumonia ( p  < 0.01, p  < 0.01, and p  = 0.01, respectively). Sensitivity and specificity of lung ultrasonography were 78.5% (67.1–87.4) and 95.2% (76.1–99.8), respectively. Conclusion: Lung ultrasonography is a useful diagnostic method for children with suspicion of community‐acquired pneumonia.