Please assess the completion status of the following clinical trial:

Trial Title: Dexmedetomidine in Spinal Anesthesia

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

Eligibility Criteria:
Inclusion Criteria:~* 20 - 60 aged patients~* orthopedic operation undergoing spinal anesthesia~Exclusion Criteria:~* more than American society of anesthesiologists classification 3~* hypertension~* diabetes mellitus~* heart disease (bradycardia, atrioventricular block)

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: 60 Years
- Healthy Volunteers: f

Study Arms:
- Dexmedetomidine (Type: EXPERIMENTAL): IV dexmedetomidine infusion before intrathecal injection of heavy bupivacaine
- Dexmedetomidine with heavy bupivacaine (Type: ACTIVE_COMPARATOR): IV dexmedetomidine infusion after intrathecal injection of heavy bupivacaine

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