Please assess the completion status of the following clinical trial:

Trial Title: Dexmedetomidine Versus Propofol in Vitreoretinal Surgery

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

Eligibility Criteria:
Inclusion Criteria:~* American Society of Anesthesiologists rating of I-III~* good renal and liver function~Exclusion Criteria:~* renal and hepatic insufficiency~* uncontrolled diabetes~* uncontrolled hypertension~* severe cardiac disease Class III or IV~* heart blocks~* chronic use of sedatives, narcotics, alcohol or illicit drugs~* allergy to either propofol or dexmedetomidine~* pregnancy or inability to tolerate technique of the study drugs

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 70 Years
- Healthy Volunteers: f

Study Arms:
- Propofol (Type: ACTIVE_COMPARATOR): propofol 1mg/kg as a bolus intravenously followed by an infusion of 25-100 ug/kg/min
- dexmedetomidine infusion (Type: EXPERIMENTAL): Subject will receive a bolus of0.5ug/kg intravenously over a period of 10-15 minutes, followed by an infusion of 0.2-0.7ug/kg/hr of drug.

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