Table 2.
Intraoperative and postoperative modified lung ultrasound scores
| Low-Fio2 group (n = 44) | High-Fio2 group (n = 46) | P-value | |
|---|---|---|---|
| Baseline, after intubation | |||
| Substantial atelectasis, n | 12 (27.3%) | 15 (32.6%) | 0.747 |
| Total modified LUSS | 5.0 (3.0–8.0) | 4.0 (4.0–6.0) | 0.524 |
| Anterior regions | 0.0 (0.0–1.0) | 0.0 (0.0–1.0) | 0.538 |
| Lateral regions | 1.0 (0.0–2.5) | 1.0 (0.0–2.0) | 0.427 |
| Posterior regions | 4.0 (2.0–4.0) | 3.0 (3.0–4.0) | 0.839 |
| End of surgery, before extubation | |||
| Substantial atelectasis, n | 21 (47.7%) | 39 (84.8%) | < 0.001 |
| Total modified LUSS | 6.0 (4.5–9.0) | 12.0 (9.0–14.0) | < 0.001 |
| Anterior regions | 0.0 (0.0–2.0) | 2.0 (1.0–4.0) | < 0.001 |
| Lateral regions | 1.5 (0.0–2.5) | 3.5 (2.0–4.0) | < 0.001 |
| Posterior regions | 4.0 (3.0–6.0) | 6.0 (5.0–8.0) | < 0.001 |
| Post-anesthesia care unit, before discharge | |||
| Substantial atelectasis, n | 22 (50.0%) | 40 (87.0%) | < 0.001 |
| Total modified LUSS | 7.0 (5.0–10.0) | 12.0 (10.0–16.0) | < 0.001 |
| Anterior regions | 1.0 (0.0–2.5) | 3.0 (2.0–4.0) | < 0.001 |
| Lateral regions | 2.0 (1.0–3.5) | 4.0 (2.0–5.0) | < 0.001 |
| Posterior regions | 4.0 (3.0–6.0) | 7.0 (5.0–8.0) | < 0.001 |
Data are expressed as median (interquartile range), or number (%). Anterior, lateral, and posterior regions of the thorax were divided by the anterior and posterior axillary lines. LUSS, lung ultrasound score