Please assess the completion status of the following clinical trial:

Trial Title: Ultrasound-guided Serratus Plane Block for the Quality of Recovery After Modified Radical Mastectomy

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

Eligibility Criteria:
Inclusion Criteria:~* Patients of American Society of Anesthesiologists' (ASA) Physical Status class I-II scheduled for first modified radical mastectomy were included.~Exclusion Criteria:~* Patients with chronic ethanol~* long-term use of psychotropic drugs (e.g. sedative drugs and antidepressant);~* contraindications for serratus plane block including coagulopathy, infection at the puncture site;~* unable to cooperate with this research due to cognitive impairment, psychopathy or not willing for the hospital follow-up;~* administration of other test drugs or joining in other clinical study in 3 months before our study;~* received radiotherapy or chemotherapy before surgery;~* other conditions not allocated for this study out of the researchers' consideration.

- Gender: FEMALE
- Minimum Age: 18 Years
- Maximum Age: 60 Years
- Healthy Volunteers: t

Study Arms:
- group control (Type: PLACEBO_COMPARATOR): group control :Before induction of intravenous anesthesia, patients were received an ultrasound-guided serratus plane block, the serratus plane was injected with 0.9% Nacl 0.4ml/Kg.
- group SPB (Type: EXPERIMENTAL): group SPB:Before induction of intravenous anesthesia, patients were received an ultrasound-guided serratus plane block, the serratus plane was injected with 0.5% ropivacaine 0.4ml/Kg.

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