Please assess the completion status of the following clinical trial:

Trial Title: Effect of Combination Dexmedetomidine Added to Fentanyl-based Intravenous Patient-controlled Analgesia on Nausea Vomiting in Highly Susceptible Patients Undergoing Lumbar Spinal Surgery: Prospective Double Blinded Randomized Controlled Trial

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

Eligibility Criteria:
Inclusion Criteria:~1. female, non-smoking patient who are 20-65 of age scheduled for elective lumbar spine surgery~Exclusion Criteria:~1. Bradycardia on EKG (45bpm)~2. Atrioventricular conduction disorder~3. Uncontrolled hypertension~4. angina history~5. obesity (BMI ≥ 30 kg/m2)~6. Preoperative administration of opioid~7. Preoperative administration of antiemetics~8. Gastrointestinal disorder history~9. Hepatic or renal disease~10. Pregnant 11. Foreigner

- Gender: FEMALE
- Minimum Age: 20 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- dexmedetomidine (Type: EXPERIMENTAL): addition of dexmedetomidine to fentanyl-based intravenous patient controlled analgesia (PCA)
- normal saline (Type: PLACEBO_COMPARATOR): normal saline as a placebo

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