Please assess the completion status of the following clinical trial:

Trial Title: The Value of Adding Either Meperdine or Fentanyl to Clonidine-bupivacaine

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

Eligibility Criteria:
Inclusion Criteria:~* Adults ASA I, II.~* Elective orthopedic lower limb surgery~Exclusion Criteria:~* Patients will be excluded from the study if their preoperative medication included opioid or non-opioid analgesics, corticosteroids, or non-steroidal anti-inflammatory drugs. Coagulation disorders, pregnancy, age less than 18 year, patient refusal, and emergency re-operation within the first 24hours also were exclusion criteria.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 60 Years
- Healthy Volunteers: f

Study Arms:
- Meperdine group (Type: ACTIVE_COMPARATOR): 15ml 0.5% bupivacaine,25 mg of meperdine and 1 ml of clonidine will be injected epidurally in meperdine Group.
- Fentanyl group (Type: ACTIVE_COMPARATOR): 15ml 0.5% bupivacaine, 25 micrograms of fentanyl and 1 ml of clonidine will be injected epidurally in fentanyl Group

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