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Table 4 Number of recruitment manoeuvres

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

  T1 χ2 P value T2 χ2 P value
SI group UD group SI group UD group
Number of RMs
  0 0(0.00%) 0(0.00%) 45.88 0.00 0(0.00%) 0(0.00%) 49.09 0.00
  1 30(100.00%) 4(13.33%) 30(100.00%) 3(10.00%)
  2 0(0.00%) 14(46.67%) 0(0.00%) 13(43.33%)
  3 0(0.00%) 8(26.67%) 0(0.00%) 7(23.3%3)
  4 0(0.00%) 4(13.33%) 0(0.00%) 6(20.00%)
  5 0(0.00%) 0(0.00%) 0(0.00%) 1(3.33%)
Maximal inflation pressure(cmH2O)
  30 30(100.00%) 18(90.00%) 3.13 0.08 30(100.00%) 13(65.00) 12.21 0.00
  35 0(0.00%) 2(10.00%) 0(0.00%) 5(25.00%)
  40 0(0.00%) 0(0.00%) 0(0.00%) 2(10.00%)