Please assess the completion status of the following clinical trial:

Trial Title: Comparative Study of Ultrasound-guided Paravertebral Block Versus Intravenous Tramadol in Percutaneous Nephrolithotomy

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

Eligibility Criteria:
Inclusion Criteria:~* 53 patients scheduled for percutaneous nephrolithotomy (PNL),~* 18-70 years of age,~* weight between 50-100 kg,~* American Society of Anesthesiologists (ASA) classification I-II were included~Exclusion Criteria:~* The exclusion criteria were refusals by patients,~* coagulation abnormalities,~* patients with spinal deformity,~* cutaneous infection at the injection site and~* a known allergy to drugs.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 70 Years
- Healthy Volunteers: f

Study Arms:
- Group Paravertebral Block (Type: ACTIVE_COMPARATOR): With ultrasound guidance at T10 to L1 levels, using 0.5% bupivacaine total dose of 15 mL in group P. 5 mL bupivacaine 0.5% was injected in each dermatome level.
- Group tramadol (Type: PLACEBO_COMPARATOR): Patients in group T were given a loading dose of tramadol of 1 mgkg-1

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