Fig. 5

Difference in severity by oxygenation assessment method. Eighteen subjects received HFOV at PARDS onset. When severity was stratified by OI, 1 had mild PARDS, 7 moderate and 10 severe. When the PF is used for the same subjects 3 have mild ARDS, 11 moderate ARDS, 4 severe ARDS. Forty-three subjects received HFOV 24 h after onset, when severity is stratified by the OI 2 meet criteria for mild PARDS, 19 for moderate PARDS, 22 for severe PARDS. When the PF is used 1 doesn’t meet criteria for ARDS anymore, 8 meet criteria for mild ARDS, 27 for moderate and 7 for severe ARDS. Forty-five subjects received HFOV 48 h after onset. Hereof 5 met criteria for mild PARDS, 20 for moderate and 20 for severe PARDS. When these subjects were stratified by PF 3 do not meet ARDS criteria anymore, 11 meet criteria for mild ARDS, 19 for moderate ARDS and 12 meet criteria for severe ARDS