Table 2.

Definitions of scores 0-3 for the purposes of calculating lung ultrasound scores^⁎

Score	Description
0	Normal aeration of the lung with the presence of A-lines, persistent pleural sliding, and fewer than three B-lines
1	Interstitial syndrome, resulting in moderate loss of aeration with three or more B-lines spaced 7 mm apart
2	Alveolar-interstitial syndrome, resulting in severe loss of aeration with coalescent B-lines spaced less than 3 mm apart
3	Alveolar consolidation, leading to a complete loss of aeration with an ultrasonographic tissue-like pattern

^⁎Lung ultrasound scores range from 0 to 36; they are calculated by adding together the scores given to each of the 12 thoracic zones.