Combined Technique for Difficult Intubation

In this blinded, unrandomised trial the investigators would like to investigate the change in Cormack and Lehane grade when using both videolaryngoscope (Macintosh videolaryngoscope, Karl Storz, Tuttlingen, Germany) and Bonfils® (Karl Storz, Tuttlingen, Germany). They also want to record the success of intubation and the time needed until successful endotracheal intubation when using this technique as well as complications (trauma to the oral cavity, dental trauma, and regurgitation seen by the anaesthesiologist) that may occur. Also saturation (SpO2) at the end of the procedure will be noted and adjuncts that are used.