Lung Point Sign Slide 1 of 2Slide 2 of 2 Pneumothorax -> ”lung point sign” Where visceral pleura comes into, and then out of contact with parietal pleura Most specific sign of PTX Continue NarrationSo 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. Pitfall -> pericardium Beware pericardium on left Not lung point Continue NarrationOne thing to be careful of is the pericardium, which is normal on the left and it can be mistaken for a lung point sign if the pericardium is coming in and out of the field of view when the patient breaths. And this is showing a normal left sided interrogation of the anterior thoracic space and you can see the heart coming up as the lung goes in and out and this is normal. Thoracic Ultrasound --- Table of Contents --- Lesson NameMinutes id Approach to Thoracic Ultrasound2 81 The Inferior Thoracic Space2 82 Pleural Effusions2 83 More Pleural Effusions3 84 The Anterior Pleural Line2 85 Ultrasound for Pneumothorax4 86 M-Mode for Pneumothorax2 87 Lung Point Sign2 88 The ABZ Lines3 89 B lines and AIS3 90 Pneumonia2 91 Rib Fracture1 92