Please assess the completion status of the following clinical trial:

Trial Title: Xenon as an Adjuvant to Propofol Anaesthesia in Patients Undergoing Off-pump Coronary Artery Bypass Graft Surgery.

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE2
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* patients with coronary artery disease scheduled for elective OPCAB-surgery~* patients willing and able to complete the requirements of this study~* Ejection fraction \>30%~Exclusion Criteria:~* Lack of informed consent~* age \< 18 years~* COPD GOLD \>II~* Renal dysfunction defined as serum-creatinine \>1.5mg/dl~* acute coronary syndrome during the last 24 hours; haemodynamic instability, requirement of inotropic support~* single vessel grafting~* disabling neuropsychiatric disorders (severe dementia, Alzheimer's disease, schizophrenia, depression, low preoperative cognitive state (MMSE at baseline \<25), history of stroke with residuals, increased intracranial pressure~* Hypersensitivity to the study medication~* Presumed uncooperativeness or legal incapacity

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

Study Arms:
- Xenon and propofol (Type: ACTIVE_COMPARATOR): None
- propofol (Type: PLACEBO_COMPARATOR): None

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