Table 2.

Electrical impedance tomography

Data	T0	T1	T2	T3	P value
TIV (ml)	400 [333; 423]	366 [297; 602]	420 [325; 620]	364 [274; 468]	0.132
Dorsal	164 [106; 215]	153 [109; 316]	166 [116; 280]	143 [109; 254]	0.114
Ventral	206 [169; 266]	213 [164; 328]	239 [181; 333]	214 [156; 240]	0.125
∆EELI (ml)	0 [0; 0]	258 [56; 332]a	276 [148; 451]b	290 [184; 412]c	< 0.001
Dorsal	0 [0; 0]	154 [72; 202]a	143 [42; 327]b	133 [107; 232]c	< 0.001
Ventral	0 [0; 0]	73 [− 16; 157]a	76 [38; 173]b	77 [58; 206]c	< 0.001
Inhomogeneity index	70 [41; 92]	55 [40; 69]	60 [38; 72]	67 [39; 73]	0.114

All data are expressed as median [25th–75th percentile]

T0 baseline assessment, T1 assessment soon after the end of the treatment, T2 assessment 1 h after the end of the treatment, T3 assessment 3 h after the end of the treatment, TIV tidal impedance variation, ∆EELI difference of end-expiratory lung impedance from T0

^ap < 0.05 T1 vs. T0

^bp < 0.05 T2 vs. T0

^cp < 0.05 T3 vs. T0