Please assess the completion status of the following clinical trial:

Trial Title: Comparison Between High-density Electroencephalography and Conventional Electroencephalography for Comatose Patients

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: DIAGNOSTIC
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* post anoxic coma~* over 18 years old~* agreement from families~* alive 4 days after the beginning of coma~Exclusion Criteria:~* traumatic coma~* non-traumatic but not anoxic coma~* patients with severe comorbidity previous to coma~* refusal of families to participate to the study~* contraindication to a high-density electroencephalography exam

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

Study Arms:
- electroencephalography recording (Type: EXPERIMENTAL): Cerebral measurements from high-density and conventional electroencephalography are recorded simultaneously

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