Design
This is a randomized controlled multi-centre study with a three-arm parallel study design (s. Fig. Flow diagramThe “conventional laryngoscopy” study arm serves as a control group in this experimental setup. The two study arms using VAL will initially be combined at the first stage of the analysis to show that the method “VAL” is non-inferior to the established gold standard regardless of the blades used. If this first analysis can prove non-inferiority, the three individual groups will also be compared against each other.