A-Lines vs B-Lines on Lung POCUS

A-Lines:

 • Predominately horizontal lines

 • A-lines are repeated horizontal & parallel lines which are equidistant from the pleura. Commonly seen in dry lungs, asthma, COPD and also a pneumothorax.

B-Lines

 • Predominately vertical lines

 • B-lines are vertical lines that come from the pleura, extend to the bottom of the screen and move with respirations. 3 or more B-lines in a region is considered pathologic. Commonly seen in pulmonary edema, ARDS, pneumonia and other pathology.



 - MCW EM Ultrasound @MCW_EM_US



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