Dynamic Air Bronchogram on Lung Ultrasound
Definition:
A dynamic air bronchogram refers to the movement of air within the bronchi that is visible on ultrasound. It typically appears as hyperechoic (bright) lines or dots that move within a hypoechoic (dark) background representing consolidated lung tissue.
Clinical Significance:
- **Pneumonia:** Dynamic air bronchograms are most commonly associated with pneumonia. They indicate that there is still air movement within the bronchi, despite the surrounding lung tissue being consolidated (filled with fluid, inflammatory cells, or pus). This finding supports the diagnosis of an infectious process rather than atelectasis.
I always prefer subclavian if there’s no obvious contra-indication.