Table 2.

Temporal evolution of lung ultrasound score in posterolateral alveolar and/or pleural syndrome and lower posterior area

LUS score	Lung protective group (n = 30)	Control group (n = 30)	Z	95% CI
Left PLAPS area
Pre-operative	0 [0 to 0]	0 [0 to 0]	0	0
After anaesthesia induction	0 [0 to 0]	0 [0 to 0]	0	0
Immediately after surgery	1 [1 to 1]	2 [1 to 3]	−5.431	−1 to −1
Immediately after intubation	1 [1 to 1]	1 [1 to 1]	−0.853	0 to 0
15 min after intubation	1 [1 to 1]	1 [0.75 to 1]	−0.640	0 to 0
3 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
12 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
24 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
Left lower posterior area
Pre-operative	0 [0 to 0]	0 [0 to 0]	0	0
After anaesthesia induction	0 [0 to 0]	0 [0 to 0]	0	0
Immediately after surgery	1 [1 to 1]	1 [1 to 2]	−3.207	−1 to 0
Immediately after intubation	1 [1 to 1]	1 [1 to 1]	−1.026	0 to 0
15 min after intubation	1 [1 to 1]	1 [1 to 1]	−0.399	0 to 0
3 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
12 h after extubation	0 [0 to 0]	0 [0 to 0]
24 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
Right PLAPS area			0	0
Pre-operative	0 [0 to 0]	0 [0 to 0]	0	0
After anaesthesia induction	0 [0 to 0]	0 [0 to 0]	0	0
Immediately after surgery	1 [1 to 1]	2 [2 to 3]	−5.049	−1 to −1
Immediately after intubation	1 [1 to 1]	1 [1 to 1]	−1.209	0 to 0
15 min after intubation	1 [0 to 1]	1 [1 to 1]	−0.605	0 to 0
3 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
12 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
24 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
Right lower posterior area
Pre-operative	0 [0 to 0]	0 [0 to 0]	0	0
After anaesthesia induction	0 [0 to 0]	0 [0 to 0]	0	0
Immediately after surgery	1 [1 to 1]	2 [1 to 2]	−4.179	−1 to 0
Immediately after intubation	1 [0 to 1]	1 [1 ti 1]	−3.252	−1 to 0
15 min after intubation	0 [0 to 0]	0 [0 to 0]	−0.359	0 to 0
3 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
12 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
24 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
Posterior chest regions
Pre-operative	0 [0 to 0]	0 [0 to 0]	0	0
After anaesthesia induction	0 [0 to 0]	0 [0 to 0]	0	0
Immediately after surgery	4 [4 to 5]	8 [4 to 6]	−6.324	−4 to −4
Immediately after intubation	3 [3 to 4]	4 [4 to 4]	−3.161	−1 to 0
15 min after intubation	3 [2 to 3]	3 [2 to 3]	−0.390	0 to 0
3 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
12 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0
24 h after extubation	0 [0 to 0]	0 [0 to 0]	0	0

LUS scores are median [IQR].

PLAPS, posterolateral alveolar and/or pleural syndrome.