Fig. 6

MV is generally unnecessary for mild pneumothorax. For pneumothorax patient, if spared area (the area that pleural line and A line clearly display surrounded by edema)(A) or lung point (B) exists in the LUS images. It could be mostly mild pneumothorax, usually no MV treatment needed, the real-time ultrasound examination clearly display the presence of lung point, which was a mild pneumothorax involves less than one intercostal space. Please also refer to Video 2