The present study compares two different types of videolaryngoscope blade, which is a channeled and non-channeled blade. The purpose of the study is to investigate the effect of the type of videolaryngoscope blade on the intubation condition.

In tracheal intubation for general anesthesia, one of the two types of the blade during a video laryngoscopy can be used, one is a channeled blade that has a channel for tracheal tube launching, the other is a non-channeled blade. In the present study, the outcomes by using two types of the videolaryngoscope blade such as the intubation condition, intubation time, first-pass rate, and the incidence of intubation-related complications were compared.

Inclusion Criteria:

• Patients receiving tracheal intubation for general anesthesia
• Patients with physical status 1, 2, or 3 by American Society of Anesthesiologists Physical Status.

Exclusion Criteria:

• Body mass index <18.5 kg/m2 or >35 kg/m2
• Patients with a history of airway surgery
• Patients with increased risk of aspiration
• Patients who have any pathology (polyp, tumor, or inflammation) in the upper airway and larynx