This study aims to determine whether hyperangulated blades have a higher intubation success rate than Macintosh blades in patients undergoing general anesthesia, and to identify patient subgroups in which hyperangulated blades are particularly advantageous for tracheal intubation.
Adult patients aged ≥ 19 years undergoing surgery under general anesthesia.
Patients who did not provide informed consent
Patients with severely loose or unstable teeth
Patients with cervical spine disease
Patients with American Society of Anesthesiologists (ASA) physical status class IV or higher
Parallel
Macintosh group
Devicetracheal intubation was performed using a standard Macintosh-type videolaryngoscope blade
hyperangulated group
Devicetracheal intubation was performed using a hyperangulated videolaryngoscope blade
first attempt success rate
successful placement of the tracheal tube into the airway on the first attempt within 60 seconds, without the need for assistance from another operator or the use of adjunctive airway maneuvers.
Preoperative airway assessment included the modified Mallampati classification
Class I: soft palate, fauces, pillars, and uvula visible; Class II: soft palate, fauces, and uvula visible; Class III: soft palate and base of the uvula visible; Class IV: soft palate not visible
overall tracheal intubation success rate
overall tracheal intubation success rate
the number of attempts required to achieve successful intubation
the number of attempts required to achieve successful intubation
the use of adjunctive airway maneuver
the use of adjunctive airway maneuvers, such as external laryngeal manipulation (ELM)
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