Please assess the completion status of the following clinical trial:

Trial Title: Regional Cerebral Oxygen Saturation Under General Anesthesia A Pilot Study

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: COHORT
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* patients with male-to-female ratio approaching 1:1~* age ≥ 18 years~* scheduled duration of surgery longer than or equal to 60 minutes~* patients undergoing one of the following procedures:~  1. orthopedic surgery of the shoulder in beach chair position~ 2. gynecological, urological or general surgery in Trendelenburg's position~ 3. cardiac surgery~Exclusion Criteria:~* Moribund patients~* Persons without the capacity to consent~* Unability of German language use~* Inability of communication due to severe hearing and severe vision impairments~* Accommodation in an institution due to an official or judicial order~* Co-worker of the Charité~* Participation in another interventional study within 30 days before participation in this study~* Alcohol- use disorders according to the Alcohol Use Disorders Identification Test (AUDIT)~* Preoperative Dementia (Minimal Mental State Examination \< 24)~* Stroke, traumatic brain injury within the last 12 months or patients with residual neurological deficits

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

Study Arms:
- Orthopedic surgery of the shoulder (Type: None): Near-infrared spectroscopy (NIRS) can detect fluctuation of regional cerebral oxygen saturation during change from supine position to beach chair position.
- Gynecological, urological or general surgery (Type: None): Near-infrared spectroscopy (NIRS) can detect fluctuation of regional cerebral oxygen saturation during change from supine position to Trendelenburg position.
- Cardiac surgery (Type: None): Near-infrared spectroscopy (NIRS) can detect fluctuation of regional cerebral oxygen saturation in patients undergoing cardiac surgery with cardiopulmonary bypass (heart-lung machine).

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