The goal of this clinical trial is to obtain the optimal patient's comfort and cooperation during awake fiberoptic intubation with prototype device. The main question it aims to answer is: Which drug provides better sedative effect during awake fiberoptic intubation, dexmedetomidine or ketamine- midazolam combination with prototype supraglottic topical anaesthesia device?
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Patient tolerance
Timeframe: During the procedure of awake fiberoptic intubation