A comparative study between high-flow nasal oxygen therapy and venturi mask oxygen therapy for postoperative laparoscopic bariatric surgery patients with atelectasis: a randomized clinical trial

Ain-Shams Journal of Anesthesiology

Table 1 Lung ultrasound score calculation

Score 0—normal aeration	A lines—max 2 B lines
Score 1—moderate loss of aeration	≥ 3 well-spaced B lines
Score 2—severe loss of aeration	Coalescent B lines
Score 3—complete loss of aeration	Tissue-like pattern