Please assess the completion status of the following clinical trial:

Trial Title: Sleep Quality After Stellate-ganglion Block of Patients Undergoing Breast Cancer Operation

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

Eligibility Criteria:
Inclusion Criteria:~* At least18 years and pre-menopausal;~* scheduled to undergo elective breast cancer operation;~* American Society of Anaesthesiologists (ASA) risk classification I-II.~Exclusion Criteria:~* (1) patient refusal; (2) known hypersensitivity to the study medication (ropivacaine); (3) long-term use of opioids; (4) a history of psychiatric or neurological disease; (5) a preoperative Pittsburgh Sleep Quality Index (PSQI) global score higher than 6.

- Gender: FEMALE
- Minimum Age: 18 Years
- Maximum Age: 55 Years
- Healthy Volunteers: f

Study Arms:
- Control (Type: SHAM_COMPARATOR): All patients undergoing breast cancer operation will be the treatment intervention with general anesthesia as an adjunct to stellate-ganglion block with saline.
- stellate-ganglion block (Type: EXPERIMENTAL): All patients undergoing breast cancer operation will be the treatment intervention with general anesthesia as an adjunct to stellate-ganglion block with 0.25% ropivacaine hydrochloride.

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