Point-of-care ultrasound in pulmonary and pleural infections

Point-of-care ultrasound (POCUS) is a rapid bedside imaging modality available to clinicians for the diagnosis of pleuropulmonary infections. Compared with chest radiography, POCUS is more sensitive in identifying pneumonia and its complications (parapneumonic pleural effusions, necrosis, and abscesses). The most common sonographic features of pneumonia are consolidation (with irregular margins and dynamic air bronchograms), B-lines, and pleural effusion. POCUS also has prognostic applications, for example, to determine the severity of COVID-19 pneumonia or to predict residual pleural thickening in a tuberculous effusion. Finally, the presence of a complex septated ultrasound pattern in the context of pleural infection is indicative of the need for drainage, which is performed using a thoracostomy tube and instillation of intrapleural enzyme therapy.