Please assess the completion status of the following clinical trial:

Trial Title: Efficacy of S(+)-Ketamine Administered as a Continuous Infusion for the Control of Postoperative Pain

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

Eligibility Criteria:
Inclusion Criteria:~* 18 Years to 65 Years ASA I and II Accepts healthy volunteers.~Exclusion Criteria:~alcohol or illicit drugs, H2 inhibitors, opioids, or calcium-channel blockers within the last 10 days chronic pain, myocardial ischemia, psychiatric diseases.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: t

Study Arms:
- S(+)-ketamine group (SG) (Type: ACTIVE_COMPARATOR): Five minutes before surgery, patients in the SG group received an intravenous continuous infusion containing 0.3 mg.kg-1.h-1 of S(+)-ketamine
- placebo group (PG) (Type: PLACEBO_COMPARATOR): PG received the same dose of saline.

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