The aim of this study is to compare the EzVision® videoryngoscope with conventional laryngoscopy using a Macintosh blade in patients with suspected difficult intubation. This study primarily aims to test the hypothesis that laryngoscopy image is better with EzVision® videoryngoscopy compared to direct laryngoscopy. The secondary hypothesis is also to test the view that, compared to direct laryngoscopy, EzVision® videolingoscopy will improve intubation success, reduce intubation attempts, shorten intubation time, facilitate intubation, and cause less additional complications such as bleeding or sore throat.

Inclusion Criteria:

1. 18 to 65 years old;
2. American Association of Anesthesiologists (ASA) physical condition I-II-III;
3. Elective surgery requiring oral endotracheal intubation for general anesthesia;
4. Compliance with one of the difficult intubation estimation criteria (if more than one)
5. Expected extubation in the operating room

Exclusion Criteria:

1. Refusal to participate in research;
2. Age <18 and >65
3. ASA IV and above
4. Emergency cases
5. Body Mass Index (BMI) > 40 kg/m2.
6. Pregnancy
7. Cardiac surgery
8. Unexpectedly difficult intubation