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Table 4 Technical validity and adverse events for endotracheal intubation with the AWS by operator sub-group

From: Usefulness of video-laryngoscopy with the Airway Scope for intubation performance and learning: an experimental manikin controlled study

 

Operator sub-group (device order)

p value

Experts (DLM then AWS) n = 20

Novices 1 (DLM then AWS) n = 20

Novices 2 (AWS then DLM) n = 20

Events* (out of 200 attempts)

Median [Q1–Q3]**

Events* (out of 200 attempts)

Median [Q1–Q3]**

Events* (out of 200 attempts)

Median [Q1–Q3]**

Technically valid attempts, n

179

9 [8–10]

177

9 [9, 10]

184

9 [9, 10]

0.59****

Adverse technical event

 Esophageal intubation, n

0

0 [0–0]

1

0 [0–0]

1

0 [0–0]

1.0***

 Delayed ETI time (>60 s.), n

0

0 [0–0]

5

0 [0–0]

7

0 [0–0]

0.04***

 Epiglottis luxation, n

21

1 [0–2]

13

0 [0–1]

8

0 [0–1]

0.04****

 Epiglottis unloaded, n

0

0 [0–0]

2

0 [0–0]

0

0 [0–0]

0.32***

 ETT dislodgment, n

0

0 [0–0]

0

0 [0–0]

3

0 [0–0]

0.1***

 Blade malposition in glottis, n

0

0 [0–0]

9

0 [0–0]

5

0 [0–0]

0.43***

  1. ETI endotracheal intubation, DLM direct laryngoscopy with Macintosh, AWS video-laryngoscopy with Airway Scope®
  2. * Total number of each event on 200 attempts in each sub-group with AWS
  3. ** Median [1st–3rd quartile] per operator of the number of events on 10 attempts with AWS in each sub-group
  4. *** Freeman–Halton’s test
  5. **** Kruskal–Wallis test