Please assess the completion status of the following clinical trial:

Trial Title: Comparison of Remimazolam and Dexmedetomidine for Intraoperative Sedation

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

Eligibility Criteria:
Inclusion Criteria:~* Patient scheduled for lower extremity surgery under regional anesthesia, aged 19-70, of ASA class I or II.~Exclusion Criteria:~* Patient refusal~* Contraindications to regional or neuraxial anesthesia (patient refusal, increased intracranial pressure, infection at puncture site, underlying neurologic disease, severe hypovolemia, aortic or mitral stenosis, thrombocytopenia or coagulopathy)~* Contraindications to dexmedetomidine or remimazolam administration~* Allergy to dexmedetomidine or remimazolam~* Baseline MOAA/S score of 4 or less~* Pregnancy~* Other conditions considered unsuitable by the investigators

- Gender: ALL
- Minimum Age: 19 Years
- Maximum Age: 70 Years
- Healthy Volunteers: t

Study Arms:
- Remimazolam (Type: ACTIVE_COMPARATOR): None
- Dexmedetomidine (Type: ACTIVE_COMPARATOR): None

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