Table 2 Average delivered oxygen per model at 30, 60 and 90 s during simulated spontaneous breathing

95.4 (95.1–95.8)^a

99.2 (99.1–99.2)^a

99.5 (99.4–99.5)^a

96.1 (95.7–96.5)^a

99.6 (99.5–99.7)^a

99.8 (99.8–99.9)^a

76.5 (75.3–77.6)

76.3 (75.3–77.4)

76.7 (75.5–77.9)

92.9 (92.4–93.4)

96.9 (96.7–97.1)

97.3 (97.1–97.5)

91.2 (90.7–91.7)

94.4 (94.0-94.9)

94.5 (94.0–95.0)

36.8 (36.4–37.3)

38.4 (38.1–38.8)

39.0 (38.7–39.3)