Pneumothorax -> ”lung point sign”
- Where visceral pleura comes into, and then out of contact with parietal pleura
- Most specific sign of PTX
So we discussed how it may be possible to have absence of lung sliding but still not have a pneumothorax in an older patient with COPD or if they’ve had a prior lung procedure. However, if you can see this sign which is known as the lung point sign, its actually the most specific sign for pneumothorax. It shows the point at which the visceral pleura is coming in contact with the chest wall and it can tell you the size of the pneumothorax, as well it tells you exactly where that visceral pleura is coming into contact with the parietal pleura.