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. 2022 Oct 29;22:331. doi: 10.1186/s12871-022-01883-3

Table 4.

Comparison of arterial blood gas analysis in protocol A

VM HFNC mean diffference 95%CI p value
PFR (mmHg) 243.7 (62.5) 272.0 (88.6) −28.3 − 53.8 to − 2.9 0.031
PO2 (mmHg) 90.7 (18.8) 101.0 (27.4) −10.3 −19.7 to −0.9 0.034
PCO2 (mmHg) 34.6 (3.0) 32.4 (3.6) 2.1 0.9 to 3.3 0.002
HCO3 (mEq/L) 22.7 (2.3) 22.1 (2.6) 0.5 −0.2 to 1.2 0.129
pH 7.44 (0.03) 7.45 (0.03) −0.01 −0.03 to −0.00 0.003

HFNC High flow nasal cannula, VM Venture mask, CI Confidence interval, PFR PaO2/FiO2 ratio

Data are presented as mean (standard deviation)