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===[[Ultrasound: Lungs|Lung ultrasound]] of [[pneumothorax]]===
*No lung sliding seen (not specific for pneumothorax)
*May also identify "lung point": distinct point where you no longer see lung sliding (pathognomonic)
*Absence of lung sliding WITHOUT lung point could represent apnea or right mainstem intubation
*Evaluate other intercostal spaces because pneumothorax may only be seen in least dependent area of thorax
**NO comet tail artifact
**Bar Code appearance/"Stratosphere" sign on M-mode (absence of "seashore" waves)
*Ultrasound has greater sensitivity than chest x-ray for pneumothorax in trauma patients <ref>Nagarsheth K, Kurek S. Ultrasound detection of pneumothorax compared with chest X-ray and computed tomography scan. Am Surg. 2011 Apr;77(4):480-4. PMID: 21679560.</ref>
<gallery>
File:Z-lines and lung sliding.png
File:No lung sliding.png
File:Lung sliding M mode.png
File:Lung point.gif
</gallery>