Blinding
Patients and data analysts will be blinded regarding the allocation of interventions. The randomization result will be communicated to the care providers non-verbally in such a way that the patient will not take note. Before data will be evaluated, the identifying variable names will be made unrecognizable. For the study observers and the personnel carrying out the intervention, blinding is not possible due to the nature of the study. In the follow-up period two hours after the end of anaesthesia, the survey of the outcomes should be carried out, if possible, by an observer who was not involved in the intervention, to encourage blinding of the investigator here as well. It will be documented whether blinding could be facilitated at this point.Un-blinding of the patient is intended only in cases when an unexpected difficult airway situation occurred, and the patient needs to have an anaesthesia problem card issued for them. However, even in such cases, blinding can usually be kept up until after the last study visit.