From: Effects of ultrasound-guided alveolar recruitment manoeuvres compared with sustained inflation or no recruitment manoeuvres on atelectasis in laparoscopic gynaecological surgery as assessed by ultrasonography: a randomized clinical trial
C group
(n = 30)
SI group
UD group
χ2
P Value
SpO2 ≤ 90%
2 (6.70%)
0 (0.00%)
36.47
0.00
90% < SpO2 < 95%
21 (70.00%)
3 (10.00%)
5 (16.70%)
SpO2 ≥ 95%
7 (23.300%)
27 (90.00%)
25 (83.30%)