Table 2 Comparison of blood gas indexes and P/F value and LUS scores before and after treatment in the two groups

PO₂ at admission(mmHg)

86.82 ± 30.36

81.13 ± 29.33

0.168

0.682

PCO₂ at admission (mmHg)

40.61 ± 9.54

44.84 ± 12.43

3.576

0.061

PO₂ after 12 h of HFNC therapy (mmHg)

102.81 ± 38.28

99.47 ± 26.67

3.1

0.08

PCO₂ after 12 h of HFNC therapy(mmHg)

38.29 ± 8.93

38.58 ± 8.73

0.393

0.532

P/F at admission

248.51 ± 66.44

193.08 ± 49.14

4.554

0.034

P/F after 12 h of HFNC therapy

288.93 ± 57.17

228.63 ± 80.17

10.054

0.002

LUS scores at admission

15.09 ± 4.66

18.71 ± 5.46

4.286

0.04

LUS scores after 12 h of HFNC therapy

10.71 ± 3.77

18.03 ± 5.36

5.877

0.017