Table 2.
Oxygenation and ultrasonographic assessment of the diaphragmatic function before and after one hour of NIV.
| T0 pre-NIV | T1 intra-NIV | mean of differences (95% CI) | p | |
| PaO2/FiO2, | 175±65 | 239±78 | 64.1 42.9 – 85.2 |
< 0.001 |
| DE (cm) | 1.511±0.746 | 1.714±0.945 | 0.203 0.080 – 0.327 |
0.001 |
| RR (per minute) | 21.3±6.4 | 19.7±6.4 | -1.5 -3.15 – 0.01 |
0.06 |
| Tins (sec) | 0.836±0.258 | 0.879±0.323 | 0.033 -0.029 – 0.096 |
0.29 |
| Texp (sec) | 0.820±0.473 | 1.027±0.602 | 0.151 0.041 – 0.262 |
0.007 |
| Ttot (sec) | 1.64±0.61 | 1.906±0.820 | 0.227 0.083 – 0.370 |
0.002 |
LEGEND: DE, diaphragm excursion; RR, respiratory rate; Tins, inspiratory time; Texp, expiration time; Ttot, respiratory cycle total time. All values expressed as mean ± SD.