Compare the success rate of upper esophageal obstruction with cricoid pressure during videolaryngoscopy and direct laryngoscopy.
Even with appropriate cricoid pressure, the lifting force of the laryngoscope during direct laryngoscopy for tracheal intubation may counteract the cricoid pressure, making esophageal obstruction ineffective. Compared to direct laryngoscopy, videolaryngoscopy requires less lifting force, and thus, the success rate of esophageal obstruction may be higher. This study aims to compare the success rate of upper esophageal obstruction with cricoid pressure during videolaryngoscopy and direct laryngoscopy.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
DOUBLE
Enrollment
140
D-V group: the group that performs direct laryngoscopy first and then videolaryngoscopy. V-D group: the group that performs video laryngoscopy first and then directlaryngoscopy."
Success rate of esophageal obstruction during cricoid pressure
Success rate of esophageal obstruction during cricoid pressure
Time frame: During general anesthesia induction
Esophageal diameter
Esophageal diameter measured by ultrasound
Time frame: During cricoid pressure
percentage of glottic opening score
percentage of glottic opening
Time frame: During cricoid pressure
Cormack-Lehane grade
views obtained by laryngoscopy
Time frame: During cricoid pressure
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