B-Lines and comet tails

Spread from the pleural line and project vertically like a comet tail
Hyperechoic (bright)
Erase A-lines and move with lung sliding
Suggest fluid at the subpleural interlobular septum surrounded by air-filled alveoli at the level of the probe
More than 3 B-lines in a single view is abnormal

US clip B lines from PACCMUS on Vimeo.