Please assess the completion status of the following clinical trial:

Trial Title: The Effect of Dexamethasone on the Duration of Interscalene Nerve Blocks With Ropivacaine or Bupivacaine

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: FACTORIAL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: TRIPLE
- Phase: None
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Age between 18 and 75 years~* Patients undergoing shoulder procedures, such as rotator cuff repair, capsular shift, shoulder arthroplasty, subacromial decompression~Exclusion Criteria:~* Contraindications to interscalene block (Coagulopathy, infection at the needle insertion site, moderate to severe chronic obstructive pulmonary disease, contralateral pneumothorax or diaphragmatic paralysis)~* Pregnancy~* Pre-existing neuropathy involving the surgical limb~* Systemic glucocorticoid treatment (for 2 weeks or more) within six months of surgery~* Chronic opioid use (greater than 30 mg oral oxycodone equivalent per day)

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- Group 1 (Type: PLACEBO_COMPARATOR): Group 1 Ropivacaine: 30 ml 0.5% ropivacaine plus 2 ml 0.9% saline for interscalene block
- Group 2 (Type: PLACEBO_COMPARATOR): Group 2 Bupivacaine: 30 ml 0.5% bupivacaine plus 2 ml 0.9% saline
- Group 3 (Type: ACTIVE_COMPARATOR): Group 3 Ropivacaine and dexamethasone: 30 ml 0.5% ropivacaine mixed with dexamethasone 8 mg (2 ml)
- Group 4 (Type: ACTIVE_COMPARATOR): Group 4 Bupivacaine and steroid: 30 ml 0.5% bupivacaine mixed with dexamethasone 8 mg (2 ml).

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