Table 2 Clinical, echocardiographic and respiratory ultrasound variables
Variable | Failed extubation (n = 11) | Successful extubation (n = 42) | Unadjusted OR (95% CI) | p value |
|---|---|---|---|---|
RSBI (breath/min/l) median (IQR) | 48.0 (35.1–72.0) | 33.5 (25.6–55.4) | 1.03 (1.00–1.06) | 0.03 |
BNP (pmole/l) median (IQR) | 372 (152–1620) | 233 (95–475) | 1.0 (0.99–1.00) | 0.72 |
Echocardiographic variables | ||||
 LVEF (%) median (IQR) | 50 (45–55) | 65 (53–65) | 0.96 (0.91–1.0) | 0.1 |
 E median (IQR) | 0.87 (0.68–1.04) | 0.83 (0.68–0.99) | 5.43 (0.35–85.2) | 0.22 |
 E/A median (IQR) | 1.20 (0.60–1.64) | 1.13 (0.85–1.36) | 0.99 (0.38–2.59) | 0.99 |
 EDT median (IQR) | 175 (125–259) | 180 (155–217) | 0.99 (0.98–1.01) | 0.87 |
 E′ median (IQR) | 0.07 (0.05–0.11) | 0.10 (0.08–0.12) | 0.00 (0.00–1.36) | 0.052 |
 E/E′ median (IQR) | 10.9 (8.7–18.0) | 7.7 (6.4–10.6) | 1.27 (1.05–1.54) | 0.01 |
 LAA median (IQR) | 25.0 (19.3–32.0) | 20.0 (18.0–23.7) | 1.14 (1.02–1.28) | 0.02 |
 IAS fixed curvature n (%) | 7 (72.7) | 8 (17.1) | 12.95 (2.73–61.41) | 0.001 |
Lung ultrasound | ||||
 Aeration score of left and right anterior and lateral region (upper and lower zones) median (IQR) | 17 (8–20) | 11 (8–13) | 1.41 (1.01–1.82) | 0.007 |
 Aeration score of left and right lungs total median (IQR) | 22 (13–28) | 18 (13–21) | 1.12 (0.99–1.27) | 0.06 |
Diaphragmatic dysfunction n (%) | ||||
 No diaphragmatic dysfunction | 5 (45.5) | 24 (57.1) |  | 0.53 |
 Hemidiaphragm dysfunction | 4 (36.4) | 15 (35.7) | 1.28 (0.29–5.53) | 0.26 |
 Diaphragm dysfunction | 2 (18.2) | 3 (7.1) | 3.2 (0.41–24.41) | 0.49 |