Please assess the completion status of the following clinical trial:

Trial Title: Desflurane and Postoperative Sleep Quality in Patients Undergoing Elective Breast Surgery

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

Eligibility Criteria:
Inclusion Criteria:~1. Undergoing elective breast surgery~2. Age 18-75 years old~3. ASA-PS grade I or II~4. Those who voluntarily participate in the research and sign the informed consent~Exclusion Criteria:~1. Cognitive impairment (MMSE \<27) before the operation~2. The patients received adjuvant chemotherapy before the operation~3. At present, they are taking psychoactive, opioid, anti-anxiety, and hypnotic drugs~4. Known or treated patients with obstructive sleep apnea~5. Patients with other cancers

- Gender: FEMALE
- Minimum Age: 18 Years
- Maximum Age: 75 Years
- Healthy Volunteers: t

Study Arms:
- Desflurane Inhalation Group (Type: EXPERIMENTAL): Anesthesia maintenance: Desflurane inhalation (MAC 1.0-1.2) Sufentanil 0.3-0.5 μg / (kg·h) Cisatracurium 1-3 μg / (kg·min)
- Propofol Group (Type: ACTIVE_COMPARATOR): Anesthesia maintenance: Propofol TCI: 3-4ug / ml Sufentanil 0.3-0.5 μg / (kg·h) Cisatracurium 1-3 μg / (kg·min)

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