Thoracic ultrasound is one of the hottest topics in emergency and critical care sononography. Assessment for pneumothorax is accurate and relatively easy to learn.
One important sign when assessing for pneumothorax is the lung point. This is the point where normal pleural interface contacts the boundary of the pneumothorax. It is the most specific sign for pneumothorax using ultrasound.
Using B-mode ultrasound, the lung point will appear as the boundary between normal lung sliding and still lung.
Lung point:
