Please assess the completion status of the following clinical trial:

Trial Title: Effect of Single-dose Dexmedetomidine on Airway Reflex in Adult With Oral Intubation After Thyroidectomy

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* ASA physical status 1 or 2 patients patients scheduled for thyroidectomy~Exclusion Criteria:~* Severe cardiovascular disease history of motion sickness active status of upper respiratory infection allergy to dexmedetomidine patients who cannot understand Korean

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- dexmedetomidine (Type: EXPERIMENTAL): We administrate the dexmedetomidine single bolus (0.5ug/kg, intravenously, for 10 min) at time of muscle layer closing.
- saline (Type: PLACEBO_COMPARATOR): We administrate the saline single bolus (0.25ml/kg,intravenously, for 10 min) at time of muscle layer closing.

Based on this trial design, predict the completion outcome and termination type (if applicable).