Table 2 Diaphragm excursion at each time point

Before surgery (cm)

Breath normally

1.47 [1.30–1.85]

1.48 [1.17–1.77]

0.195

Maximal inspiration

4.18 [3.79–5.54]

4.68 [3.73–5.24]

0.686

40 min after surgery

Breath normally

1.17 [1.06–1.26]

1.19 [1.05–1.51]

0.305

Maximal inspiration

2.33 [2.00-2.99]

2.63 [2.11–3.49]

0.037

24 h after surgery

Breath normally

1.22 [1.05–1.50]

1.30 [1.15–1.41]

0.363

Maximal inspiration

3.01 [2.48–3.65]

3.53 [2.73–4.12]

0.030

48 h after surgery

Breath normally

1.31 [1.16–1.54]

1.35 [1.17–1.54]

0.862

Maximal inspiration

3.58 [2.92–4.43]

3.89 [3.31–4.50]

0.275