Please assess the completion status of the following clinical trial:

Trial Title: Sedation by Dexmedetomidine and Propofol

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

Eligibility Criteria:
Inclusion Criteria:~* Surgery under spinal anesthesia~* Intraoperative sedation~* American Society of Anesthesiology physical status 1 or 2~* Apnea/hypopnea index 5-14/h in Watch-PAT 200 analysis~Exclusion Criteria:~* Anatomical defects on upper respiratory tract~* Psychotic disorder~* Drug addition~* Alcohol addition~* body mass index ≥ 35 kg/m2

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 85 Years
- Healthy Volunteers: f

Study Arms:
- Dexmedetomidine (Type: EXPERIMENTAL): Intraoperative sedation is performed by using dexmedetomidine.
- Propofol (Type: EXPERIMENTAL): Intraoperative sedation is performed by using propofol

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