The GlideScope® videolaryngoscope usually visualize glottis better than the conventional laryngoscope. Under the visualization of glottis by GlideScope®, the insertion of endotracheal tube, however, is challenging. The goal of this study was to determine which of two stylet (70° vs 90°) was better, as determined by time to intubation.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
162
Time to Intubation
Time from the insertion of the Glidescope blade to the measurement of end tidal CO2 (\>30 mmHg)
Time frame: Intraoperative intubation
Success Rate of Intubation
The number of patients in which the intubation was successful at the first time.
Time frame: Intraoperative intubation
Difficulty of Intubation Measured Using Visual Analogue Scale
Difficulty of intubation will be measured using visual analogue scale (0:easiest, 100:most difficult).
Time frame: Intraoperative intubation
Number of Participants for Whom External Laryngeal Manipulation Was Necessary
External laryngeal manipulation is defined as the compression of neck for the facilitation of laryngeal view. Number of participants for whom external laryngeal manipulation was necessary will be measured.
Time frame: Intraoperative intubation
Cormack-Lehan Grade
The grade of Cormack-Lehan was assessed as I/II/III/IV (I: Full view of glottis, II: Partial view of glottis, III: Only epiglottis seen, none of glottis seen, IV: Neither glottis nor epiglottis seen). Grade I was considered better outcomes.
Time frame: Intraoperative intubation
Mallampati Grade
The Mallapati grade was assessed as I/II/III/IV (I: Soft palate, uvula, fauces, pillars visible, II: Soft palate, uvula, fauces visible, III: Soft palate, base of uvula visible, IV: Only hard palate visible). Grade I was considered better outcomes.
Time frame: Intraoperative anesthetic induction
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Thyromental Distance
The thyromental distance was measured.
Time frame: Intraoperative anesthetic induction
Postoperative Sore Throat Measured Using Visual Analogue Scale
Postoperative sore throat will be measured using visual analogue scale (0:no pain, 100: worst pain imaginable)
Time frame: at 1, 24 hr postoperatively
Mean Blood Pressure
Mean blood pressure is measured before and 2 min after intubation.
Time frame: Intraoperative intubation
Heart Rate
Heart rates are measured before and 2 min after intubation.
Time frame: Intraoperative intubation
Airway Injury
Larynx injury is assessed.
Time frame: Intraoperative intubation