Table 4 Characteristics and measurements of diaphragm and expiratory muscles for patients with successful and failed extubation
Successful extubation (n = 31) | Failed extubation (n = 3) | P value | |
|---|---|---|---|
Clinical characteristics | |||
Age, months | 4.0 (1–25) | 15 (13–15) | 0.142 |
Body weight, kg | 6.0 (4.3–13.5) | 8.9 (8.0–8.9) | 0.261 |
Duration of MV, h | 103 (67–154) | 268 (120–268) | 0.073 |
Ventilator settingsa | |||
Peak-PEEP, cmH2O | 15 (12–20) | 15 (12.7–15) | 0.855 |
Tidal volume, ml/kg | 6.6 (6.0–7.3) | 6.4 (5.8–6.4) | 0.524 |
Diaphragm | |||
Baseline thickness | 1.4 (1.0–1.6) | 1.6 (1.0–1.6) | 0.693 |
Change in thickness (% of baseline) | 10.7 (9.5–14.4) | 12.5 (12.1–12.5) | 0.785 |
Average TFdi (first 4 days) | − 5.96 (− 20.4–10.6) | − 12.4 (− 21.9–− 12.4) | 0.237 |
TFdi before extubation | 15.2 (9.6–19.1) | 4.0 (0–4.0) | 0.108 |
Expiratory muscles (OE, OI, TA) | |||
Baseline thickness | 4.2 (3.6–5.3) | 4.2 (3.5–4.2) | 0.649 |
Change in thickness (% of baseline) | − 3.89 (− 16.6–9.5) | − 33.8 (− 43–− 33.8) | 0.014 |
Average TF (first 4 days) | 5.38 (2.8–6.8) | 3.46 (2.0–3.46) | 0.236 |
TF before extubation | 6.5 (1.9–10.6) | 3.5 (0–3.5) | 0.395 |
Rectus abdominis (RA) | |||
Baseline thickness | 1.9 (1.6–2.3) | 1.6 (1.2–1.6) | 0.485 |
Change in thickness (% of baseline) | 8.12 (–0.9–22.6) | 0.54 (–16.8–0.54) | 0.564 |
Average TF (first 4 days) | 2.33 (1.7–4.1) | 2.5 (0.6–2.50) | 0.785 |
TF before extubation | 1.3 (0–4.2) | 1.4 (0–1.4) | 0.975 |