Perform a bedside point-of-care lung ultrasound — OSCE

An 8-month-old is brought to the emergency department with a 24-hour history of fever, grunting, and increased work of breathing. The oxygen saturation is 92 per cent in air, the respiratory rate is 56, and there is moderate recession. The team has decided to perform a bedside point-of-care lung ultrasound rather than an immediate chest radiograph, to determine whether this is a community-acquired pneumonia needing antibiotics and admission or a viral bronchiolitis needing supportive care. You are the paediatric registrar asked to set up the machine, perform the scan, and interpret the findings.