A randomized controlled prospective study of laryngoscopy and evaluation of the Intraoperative nerve monitoring during thyroid surgery comparing direct laryngoscopy and the C-MAC videolaryngoscope.

Intraoperative nerve monitoring (IONM) is used in addition to the visual the nerve in thyroid surgery. Here, the IONM can be done by placing electrodes on an endotracheal tube. In order to guarantee a sufficient signal quality of the IONM, the electrode must be adequately positioned on the glottis. The present study pursued the question of whether the conventional direct laryngoscopy compared with video laryngoscopy allows a visually adequate tube placement.

Inclusion Criteria:

• Age ≥ 18 Years No concurrent participation in another study
• capacity to consent
• Present written informed consent of the research participant
• Elective surgery under general anesthesia

Exclusion Criteria:

• Age <18 years
• Existing pregnancy
• Lack of consent
• inability to consent
• emergency patients
• Emergency situations in the context of a Difficult Airway Management
• ASA classification 4
• situations where the possibility of accumulated gastric contents
• Participation in another study