Please assess the completion status of the following clinical trial:

Trial Title: Xenon in 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~* Pregnancy~* chronic obstructive pulmonary disease (COPD) GOLD \> II~* Renal dysfunction defined as serum-creatinine \> 1.5 mg/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), history of stroke with residuals, significant stenosis of carotid arteries, 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:
- Drug: Xenon (Type: EXPERIMENTAL): gaseous anesthetic, dosage: 50-60% (v/v) in oxygen, continuous application during surgery
- Drug: Sevoflurane (Type: ACTIVE_COMPARATOR): inhalative anesthetic, dosage: 1.4% (v/v) in 50% oxygen/medical air , continuous application during surgery

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