Lung ultrasound in the critically ill (LUCI) and the lung point: a sign specific to pneumothorax which cannot be mimicked

Fig. 1 Regular M-mode outlook of a lung point.To the left, a seashore can be described, arising precisely from the pleural line.To the right, suddenly, a stratosphere sign is visible, that is, the total absence of any dynamic arising from the pleural line.An all-or-nothing rule, the lung point rules in pneumothorax