Endpoints
FPS rate was taken as the primary endpoint: Any intubation in which the tracheal intubation succeeded on the first attempt was interpreted as FPS. If there was oesophageal misalignment during intubation, that intubation was rated as a failure. Time to intubation (TTI) was assessed as the second endpoint: The above-mentioned countdown for the start of the study intervention was used as the starting point. The time was stopped as soon as the first effective ventilation was performed with the ventilation bag via the tracheal tube. This was confirmed by means of video analysis. For this purpose, the recordings of a camera in the room as well as the recording of the video laryngoscope were used. Furthermore, the first successful ventilation was verified using the manikin’s internal detection system. An external examiner who was not involved in the study gathered data on FPS rate and TTI.