Channelled versus nonchannelled Macintosh videolaryngoscope blades in patients with a cervical collar: a randomized controlled noninferiority trial
Primary result · Initial intubation success rateResult — go to the resultDifference in proportions −0.8 % 95% CI −4.8% to 2.9%Authors' conclusion
For videolaryngoscopic intubation in patients with a cervical collar, channelled Macintosh-type blades are an alternative to nonchannelled Macintosh-type blades, with a noninferior initial intubation success rate and a lower incidence of subglottic injury.
Study context
- Population
- Neurosurgical patients with a difficult airway simulated by a cervical collar, videolaryngoscopic intubation with a reinforced tracheal tube
- Participants
- 130 vs 131
- Comparison
- Channelled vs Nonchannelled
- Channelledn = 130
- Nonchannelledn = 131reference
- Primary endpoint
- Intubation success rate
Methodological detailsnoninferiority
- Noninferiority
Primary result
Initial intubation success rate
Difference in proportions
−0.8 %
95% CI −4.8% to 2.9%
P = 0.62
By group
Channelled vs Nonchannelled
difference in proportions −0.8 % (95% CI −4.8% to 2.9%); P = 0.62
As reported in the abstract
Secondary outcomes
Overall intubation success rate, time to intubation
- No significant differences between the two groups
Safety
| Outcome | Channelled | Nonchannelled | Difference in proportions (%) (95% CI) | P value | |
|---|---|---|---|---|---|
| Subglottic injury | 32% | 57% | −25 (−39% to −11%) | P < 0.001 | |
| −40−20020Difference, % (linear scale) |
- Subglottic injury: denominators 100 vs 95
Other intubation-related complications (lingual, dental injuries; bleeding; sore throat; hoarseness)
- No significant differences in incidence or severity between the two groups
Original publication
Channelled versus nonchannelled Macintosh videolaryngoscope blades in patients with a cervical collar: a randomized controlled noninferiority trial. Can J Anaesth. Published 22 May 2024. doi:10.
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