Table 3.
Evaluation of the effect of HFCWO on two subgroups of patients receiving or not a RM
| Not receiving RM (n = 30) | Receiving RM (n = 30) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| T0 | T1 | T2 | T3 | T0 | T1 | T2 | T3 | pvalue | |
| Not ventilated area (%) | 0.2 [0.0; 2.8] | 1.1 [0.0; 3.9] | 0.4 [0.0; 4.2] | 0.9 [0.0; 4.2] | 0.6 [0.0; 2.8] | 0.3 [0.0; 2.5] | 0.0 [0.0; 3.0] | 0.6 [0.0; 3.0] | 0.893 |
| TIV (mL) | 446 [336; 488] | 429 [361; 497] | 433 [357; 509] | 440 [345; 497] | 473 [366; 607] | 472 [414; 629] | 471 [382; 578] | 490 [67; 563] | 0.111 |
| Dorsal | 158 [138; 222] | 158 [121; 214] | 161 [133; 217] | 157 [119; 240] | 193 [160; 247] | 210 [156; 266] | 205 [169; 243] | 209 [174; 240] | 0.122 |
| Ventral | 223 [180; 313] | 246 [177; 313] | 253 [185; 322] | 235 [200; 321] | 286 [196; 353] | 303 [202; 362] | 259 [197; 335] | 270 [203; 335] | 0.679 |
| ΔTIV (mL) | 0 [0; 0] | − 4 [− 41; 42] | − 4 [− 42; 47] | − 9 [− 26; 34] | 0 [0; 0] | − 2 [34; 66] | − 3 [− 53; 40] | 1 [− 23; 27] | 0.995 |
| Dorsal | 0 [0; 0] | 6 [− 11; 21] | 1 [− 23; 20] | 4 [− 28; 20] | 0 [0; 0] | − 4 [− 16; 29] | 6 [− 20; 23] | 4 [− 10; 18] | 0.906 |
| Ventral | 0 [0; 0] | 1 [− 31; 21] | 2 [− 24; 28] | − 6 [− 24; 28] | 0 [0; 0] | 4 [− 20; 31] | − 3 [− 36; 15] | − 4 [− 21; 9] | 0.932 |
| Centre of gravity (%) | 53.8 [50.8; 56.0] | 53.5 [50.8; 56.9] | 53.7 [50.2; 57.5] | 54.0 [50.3; 56.8] | 53.3 [49.6; 54.9] | 53.2 [50.0; 55.4] | 52.8 [50.2; 54.8] | 52.3 [50.1; 54.5] | 0.561 |
| ΔEELI (mL) | 0 [0; 0] | 29 [−59; 108] | 0 [−138; 225] | 1 [−170; 162] | 0 [0; 0] | 2 [−95; 153] | 126 [−45; 352] | 61 [−102; 169] | 0.272 |
| Dorsal | 0 [0; 0] | 9 [− 30; 125] | 6 [− 77; 188] | 7 [− 83; 277] | 0 [0; 0] | 7 [− 51; 140] | 88 [− 12; 189] | 48 [− 12; 154] | 0.069 |
| Ventral | 0 [0; 0] | − 25 [− 84; 40] | − 22 [− 128; 109] | − 23 [− 122; 59] | 0 [0; 0] | 21 [− 116; 86] | 32 [− 94; 175] | 42 [− 104; 131] | 0.413 |
| Heart rate (beat/min) | 79 (14) | 81 (16) | 79 (18) | 77 (16) | 84 (16) | 84 (16) | 82 (17) | 80 (16) | 0.983 |
| Mean arterial pressure (mmHg) | 84 (13) | 84 (12) | 83 (12) | 83 (11) | 90 (13) | 90 (15) | 87 (13) | 85 (13) | 0.830 |
| Respiratory rate (breath/min) | 18 (5) | 18 (5) | 17 (5) | 17 (5) | 19 (5) | 19 (5) | 19 (5) | 19 (4) | 0.995 |
| pH | 7.42 (0.06) | 7.42 (0.06) | 7.43 (0.06) | 7.43 (0.06) | 7.42 (0.06) | 7.41 (0.05) | 7.42 (0.05) | 7.42 (0.05) | 0.972 |
| PaCO2 (mmHg) | 43.4 (8.5) | 43.4 (8.2) | 43.7 (8.6) | 43.8 (8.3) | 41.8 (8.4) | 43.1 (9.3) | 41.7 (7.8) | 41.5 (7.7) | 0.926 |
| PaO2/FiO2 (mmHg) | 240 (73) | 236 (66) | 242 (61) | 241 (62) | 212 (58) | 217 (57) | 221 (54) | 218 (49) | 0.977 |
RM recruiting manoeuvre, 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, ΔTIV difference of TIV from T0, ΔEELI difference of end-expiratory lung impedance from T0, PaCO2 arterial partial pressure of carbon dioxide, PaO2/FiO2 ratio between arterial partial pressure and inspired fraction of oxygen