Please assess the completion status of the following clinical trial:

Trial Title: The Effect of Dexmedetomidine for Suprascapular Nerve Block With Axillary Nerve Block

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:~* defined rotator cuff tear on preoperative MRI, which indicated repair~* acceptable arthroscopic surgery, including rotator cuff repair~* patients \>20 years old~* acceptable routine regional blocks and patient-controlled analgesia (PCA)~Exclusion Criteria:~* did not undergo arthroscopic rotator cuff repair~* stopped PCA before 48 h postoperatively due to side effects~* had a concomitant operation for a Bankart lesion~* had a history of shoulder operation or fracture~* had a concomitant neurological disorder around the shoulder~* underwent conversion to open surgery from the arthroscopy~* had contraindications for the routine regional blocks used in this study~* had an known allergy or hypersensitivity against ropivacaine or dexmedetomidine, including other amino-amide local anesthetics or α2-adrenoceptor agonists.

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: 80 Years
- Healthy Volunteers: f

Study Arms:
- SSNB and ANB c DEX (Type: EXPERIMENTAL): We used 9.5 ml of 0.75% ropivacaine and 0.5 ml (50 μg) of dexmedetomidine each for SSNB and ANB.
- SSNB and ANB c saline (Type: PLACEBO_COMPARATOR): We used 9.5 ml of 0.75% ropivacaine and 0.5 ml normal saline each for SSNB and ANB.

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