Group

No.

Time

PaCO₂

(mmHg)

PaO₂

(mmHg)

po2/fio2

Control group

49

Pre-intervention

38.63 ± 3.65

89.12 ± 15.61

416.43 ± 84.39

Post-intervention

41.86 ± 3.08

90.98 ± 7.49

434.37 ± 36.43

Observation group

49

Pre-intervention

38.92 ± 3.48

89.19 ± 14.32

416.24 ± 84.21

Post-intervention

39.47 ± 4.32^①

94.93 ± 9.76^①

449.63 ± 48.14^①