FIGURE 7.

The Bland‐Altman plot analyses of the PO₂ differences against the PO₂ averages between the two measurements of the AB and ACV (A,C) and the AB and ASV (B,D) samples during O₂ inhalation at FIO₂ of 0.21 (A,B) and FIO₂ of 1.0 (C,D). The central solid line represents the mean bias of measurements; the adjacent broken lines show the 95% LoA (±1.96 SD), and the thin dashed line is the best fit. The clinical allowable limits defined in the present study are shaded in gray. The PO₂ values of the ACV and ASV samples showed no clinical agreement with those of the AB samples during O₂ inhalation at FIO₂ of 0.21 and FIO₂ of 1.0. AB, arterial blood; ACV, arterialized cephalic venous blood; ASV, arterialized saphenous venous blood; FIO₂, fraction of inspiratory oxygen; PO₂, partial pressure of oxygen; 95% LoA, 95% limits of agreement.