Ambu AuraGain, I-gel, Air-Q intubating laryngeal airway are the most commonly used supraglottic airway. In children, they can be used as intubation conduits. However, there has been no guideline for optimal insertion depth of endotracheal tube through those supraglottic airway. In this study, the investigators will measure the distance from grille of those supraglottic airways to glottis using fiberoptic bronchoscope in children undergoing anesthesia. This distance allows us to predict an appropriate depth of endotracheal tube when it should be inserted through each supraglottic airway.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
NONE
Enrollment
89
Distance from grille (the end of shaft in supraglottic airway) to glottis is measured using FOB
Seoul National University Hospital
Seoul, South Korea
The distance from grille to glottis
The distance from grille to glottis is measured using fiberoptic bronchoscopy
Time frame: 30 seconds after each supraglottic airway insertion
FOB view
score 1: no visible glottis, score 2: visible glottis and anterior epiglottis, score 3: visible glottis and posterior epiglottis, and score 4: only glottis visible
Time frame: 30 seconds after each supraglottic airway insertion
Ventilation score
no air leak in airway pressure of 15 cmH2O / bilateral chest wall movement/ normal waveform of capnography
Time frame: 30 seconds after each supraglottic airway insertion
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