A clinical trial of dexmedetomidine or remifentanil sedation for awake fibreoptic intubation

This clinical trial is studying a clinical trial of dexmedetomidine or remifentanil sedation for awake fibreoptic intubation. You may be eligible if you are adults aged 18 and older who awake fibreoptic intubation, no contraindication to remifentanil or dexmedetomidine. People with chronic alpha-2 agonist or opioid therapy, allergy or previous adverse reaction to study drugs, uncontrolled hypertension may not be able to participate. Participation may involve medical tests, study visits, and follow-up appointments.