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Table 3 Primary and secondary outcomes in obese patients with obesity according to the strategy of preoxygenation

From: Noninvasive ventilation vs. high-flow nasal cannula oxygen for preoxygenation before intubation in patients with obesity: a post hoc analysis of a randomized controlled trial

 

Non-invasive ventilation (n = 40)

High-flow nasal cannula oxygen (n = 51)

P value

Outcomes

 SpO2 < 80% during intubation procedure, n (%)

15 (37)

16 (31)

0.54

 Lowest SpO2 during intubation procedure, median (IQR)

87 (77–93)

86 (78–92)

0.98

 SpO2 at the beginning of preoxygenation, %, median (IQR)

94 (92–99)

96 (93–99)

0.25

 SpO2 at the end of preoxygenation, %, median (IQR)

99 (98–100)

99 (96–100)

0.26

Procedure of tracheal intubation, n (%)

 Duration of laryngoscopy, n (%)

0.98

  < 1 min

24 (62)

31 (61)

 

  1 to 3 min

10 (26)

14 (27)

 

  > 3 min

5 (13)

6 (12)

 

 Number of laryngoscopy attempt

0.90

  One

30 (75)

38 (79)

 

  Two

8 (20)

8 (17)

 

  Three or more, or > 10 min

2 (5)

2 (4)

 

 First junior operator

10 (25)

12 (24)

0.87

 Intervention of another skilled operator

14 (35)

12 (23)

0.23

 Use of alternative management devices

7

8

0.81

  Introducer

6 (15)

8 (16)

 

  Other

1 (3)

0

 

 Intubation Difficulty Scale,a n (%)

0.35

  ≤ 5

30 (81)

45 (88)

 

  > 5

7 (19)

6 (12)

 
  1. aThe Intubation Difficulty Scale denotes the Intubation Difficulty Scale score, 0 easy, 0 to 5 slight difficulty, > 5 moderate to major difficulty for intubation
  2. SpO2 pulse oximetry, IQR interquartile range