Table 3 Difference of ventilation distribution related EIT-parameters of two levels in 50 critically ill patients
Parameters | Diaphragm-based EIT-belt level (n = 50) | 5th ICS level (n = 50) | Paired differences | 95%CI of the difference | P-value |
|---|---|---|---|---|---|
Glob-TVΔZ (au) | 3082 ± 1103 | 2691 ± 1139 | 390 ± 560 | 231 to 549 | < 0.0001 |
TV/VT ratio | 7.12 ± 3.0 | 6.21 ± 3.0 | 1.0 ± 1.4 | 0.6 to 1.4 | < 0.0001 |
ROI1 ΔZ (au) | 365 ± 175 | 325 ± 171 | 39 ± 94 | 12 to 66 | 0.005 |
Percentage (%) | 12 ± 5 | 12 ± 5 | − 0.4 ± 2.7 | − 1.2 to 3.6 | 0.291 |
ROI2 ΔZ (au) | 1465 ± 541 | 1214 ± 500 | 250 ± 331 | 156 to 344 | < 0.0001 |
Percentage (%) | 48 ± 8 | 46 ± 8 | 1.8 ± 4.3 | 0.6 to 3.0 | 0.05 |
ROI3 ΔZ (au) | 1022 ± 496 | 948 ± 525 | 74 ± 197 | 18 to 130 | 0.01 |
Percentage (%) | 33 ± 9 | 34 ± 9 | − 1.6 ± 4.6 | − 0.3 to 0 | 0.018 |
ROI4 ΔZ (au) | 230 ± 124 | 203 ± 141 | 27 ± 59 | 10 to 44 | 0.002 |
Percentage (%) | 7 ± 3 | 7 ± 3 | 0.1 ± 1.5 | 0 to 0.1 | 0.363 |
Upper right ΔZ (au) | 877 ± ± 383 | 791 ± 355 | 86 ± 237 | 19 to 154 | 0.013 |
Percentage (%) | 29 ± 10 | 31 ± 12 | − 2 to 6.5 | − 4 to 0 | 0.027 |
Upper left ΔZ (au) | 880 ± 424 | 692 ± 389 | 187 ± 242 | 118 to 256 | < 0.0001 |
Percentage (%) | 28 ± 9 | 25 ± 10 | 3.0 ± 6.1 | 1.2 to 4.7 | 0.01 |
Lower right ΔZ (au) | 642 ± 334 | 589 ± 347 | 53 ± 201 | − 4 to 110 | 0.70 |
Percentage (%) | 20 ± 8 | 21 ± 9 | − 1 ± 5.6 | − 3.0 to 0.5 | 0.174 |
Lower left ΔZ (au) | 545 ± 329 | 518 ± 361 | 27 ± 143 | − 14 to 68 | 0.191 |
Percentage (%) | 17 ± 7 | 18 ± 8 | − 1.1 to 5.1 | − 2.6 to 0.3 | 0.122 |