2. Lung ultrasound and LUSS
In COVID-19 group, there were totally 132 regions reviewed and 83
regions (62.8%) detected abnormalities. Each patient showed
abnormalities in bilateral lungs and multiple regions, with maximal 10
regions, average 7.5 regions involved. The majority of detectable
ultrasonic signs were increased B-lines (83 regions, 62.8%), from
sparse (73 regions, 55.3%) B-lines to confluent B-lines (10 regions,
7.6%); abnormal scored 1, 10 regions (8%) scored 2 and no regions
scored 0. Lung score was obviously higher in COVID-19 group than that in
control group (Fig. 3). The lesions were primarily located in bilateral
lower A-lines (83 regions, 62.8%), from decreased A-lines (52 regions,
39.3%) to disappear of A-line (31 regions, 23.4%); blurring,
irregularities, interruption of pleural line (29 regions, 21.9%),
subpleural consolidation (5 regions, 3.8%), and no pleural effusion
(Fig. 2). There were 49 regions (37%) were normal, 73 regions (55%)
lobes and right middle lobe (region L4, L5, L6, R3, R4, R5, R6) (Table
3).