Pneumothorax -> no lung sliding

No sliding typically indicates PTX

False positives (lack of sliding with no PTX) COPD, blebs S/p pleurodesis



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Narration

So when there is no lung sliding there typically is a pneumothorax particularly in younger healthy patients where you can compare one side to the other. Do keep in mind that there can be false positives where you have a lack of sliding but there is no pneumothorax present and this can occur in things like COPD or you may have large blebs that don’t look to be sliding very well, or if they have had a procedure such as pleurodesis that may adhere the visceral to the parietal pleura in the absence of a pneumothorax.