Participants are randomly assigned to two groups: one group undergoes nasotracheal intubation using a videolaryngoscope, while the other group undergoes nasotracheal intubation using a flexible bronchoscope. The primary outcome is the first-attempt success rate, assessed at the time of tracheal tube placement. Additional outcomes include the degree of subglottic injury upon extubation, and the incidence and severity of sore throat and hoarseness at 1 hour and 24 hours postoperatively, as well as overall intubation success rates.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
74
Used to perform nasotracheal intubation under general anesthesia. The Macintosh videolaryngoscope is introduced orally to visualize the glottis, and a preformed nasotracheal tube is inserted through the nostril.
Used to perform nasotracheal intubation under general anesthesia. The bronchoscope is inserted through a lubricated nasotracheal tube and advanced into the trachea.
Seoul National University Hospital
Seoul, South Korea
First-attempt success rate of nasotracheal intubation
The proportion of patients in whom nasotracheal intubation is successfully completed on the first attempt, comparing the videolaryngoscope group with the flexible bronchoscope group.
Time frame: At the time of tracheal intubation
Degree of subglottic injury
Graded from 0 to 3 using a flexible bronchoscope. Higher scores mean a worse outcome (more severe subglottic injury).
Time frame: At the time of extubation
Postoperative sore throat severity
Assessed using the Numeric Rating Scale (0-10) at 1 and 24 hours after surgery.
Time frame: 1 hour and 24 hours postoperatively
Incidence of postoperative hoarseness
Presence or absence of hoarseness evaluated at 1 hour and 24 hours postoperatively.
Time frame: 1 hour and 24 hours postoperatively
Cormack-Lehane grade
Grading recorded during intubation to evaluate glottic exposure.
Time frame: At the time of tracheal intubation
Changes in blood pressure
Changes in blood pressure recorded before and after tracheal intubation.
Time frame: Within 5 minutes before and after intubation
POGO score
Visualization scores recorded during intubation to evaluate glottic exposure. The score ranges from 0% (no glottic visualization) to 100% (full view of the glottis). Higher scores indicate a better outcome (better visualization).
Time frame: At the time of tracheal intubation
Changes in heart rate
Changes in heart rate recorded before and after tracheal intubation.
Time frame: Within 5 minutes before and after intubation
Changes in saturation
Changes in SpO₂ recorded before and after tracheal intubation.
Time frame: Within 5 minutes before and after intubation
Changes in bispectral value
Changes in BIS values recorded before and after tracheal intubation.
Time frame: Within 5 minutes before and after intubation
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