Table 4 Reasons for desaturation (S_pO₂ < 90%)

Desaturation < 90%

4.0 (7)

0.6 (1)

2.9 (5)

Lowest S_pO₂ mean (SD) %

81.6 (±4.4)

72.0 (±0.0)

81.0 (±7.8)

 Reason documented

71.4 (6)

100 (1)

60.0 (3)

 ARDS, insufficient HFJV

57.1 (4^a)

 Chest trauma, insufficient HFJV

14.3 (1)

 Insufficient HFJV as a result of tilting the TED to illuminate the trachea

14.3 (1)

 Bleeding

100 (1^a)

 Difficult insertion of cannula

66.7 (2)

 Bronchospasm

33.3 (1)

 Reason n. a.

14.3 (1)

0.0 (0)

40.0 (2)

 Medical

85.7 (6)

100 (1)

33.3 (1)

 Technical

14.3 (1)

0.0 (0)

66.6 (2)