- Prevents tongue falling backward and the patient from biting the endoscope
- Central groove guides the endoscope in the midline
- Airway can be removed without disturbing the position of the endoscope
- Slit at the end of the airway allows advancement of the tip of the endoscope beyond epiglottis to visualize the larynx
- Side channels are provided to permit suctioning without interrupting endoscopy
- Well tolerated by the patient under topical anesthesia and/or sedation
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