Please assess the completion status of the following clinical trial:

Trial Title: Erector Spinae Plane Block vs. Usual Care for ED Patients With Mechanical Back Pain

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

Eligibility Criteria:
Inclusion Criteria: Patients deemed to have mechanical back pain with a component of paravertebral tenderness or paravertebral spasm reported by the patient or noted on examination by treating physician.~Exclusion Criteria:~* previous recipient of erector spinae plane block~* exam concerning for cauda equina syndrome~* current IV drug use~* organ transplant recipient~* history of or suspected bleeding diathesis~* current use of anticoagulants~* sepsis or soft tissue infection at site of the block within last three months~* pregnancy~* overt malignancy involving skin or underlying soft tissue at the site of block~* allergy to any of the research medications~* inability to participate in telephone follow-up

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- ESP cohort (Type: EXPERIMENTAL): Randomized to receive the ultrasound-guided ESP block.
- Usual care cohort (Type: ACTIVE_COMPARATOR): Randomized to usual care as dictated by the treating emergency physician

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