Please assess the completion status of the following clinical trial:

Trial Title: Can Dexmedetomidine For Procedural Sedation In Knee Arthroplasty Reduce Postoperative Pain? A Randomized Control Study

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

Eligibility Criteria:
Inclusion Criteria:~* Total Knee arthroplasty American Society of Anesthesiologist score of 1-3 Age 18-85 Elective total knee arthroplasty under spinal anesthetic.~Exclusion Criteria:~* Contraindication to Dexmedetomidine. (second or third degree heart block, renal or hepatic dysfunction) Contraindication to Spinal Anesthetic Pain being treated by opioids prior to operation Contraindication to premedication Previous total knee arthroplasty

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

Study Arms:
- Dexmedetomidine arm (Type: EXPERIMENTAL): Standardized pre-op meds and spinal anesthetic.~Once the patient's spinal is performed, patient will receive the following:~Start with bolus of 0.5micrgram/kg over 10 minutes, and then infusion of 0.5 microgram/kg/hr~Infusion will be stopped after the last staple or suture is performed on the incision.~Both groups will have a midazolam 0.5mg prn q 5minutes to be used as a rescue to achieve moderate sedation as defined by ASA.
- Saline Placebo (Type: PLACEBO_COMPARATOR): Patients will receive the standardized pre-op meds and spinal anesthetic. Once the spinal anesthetic is performed,~Patient will receive the same infusion rates as in the Dexmedetomidine arm, however with Normal Saline as a Placebo.~midazolam 0.5mg prn q 5minutes to be used as a rescue to achieve moderate sedation.

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