Please assess the completion status of the following clinical trial:

Trial Title: Safety of Optimal PEEP in NSICU Patients

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

Eligibility Criteria:
Inclusion Criteria:~* Adult patients (age \>/= 18) admitted to the Neuro ICU of UNC Hospital requiring mechanical ventilation and with ICP monitoring in place.~Exclusion Criteria:~1. Pneumothorax or pneumomediastinum~2. Life expectancy \< 24 hours or expected to require mechanical ventilation for \< 24 hours~3. Condition that precludes placement of an esophageal balloon \[esophageal or nasopharyngeal pathology preventing insertion of the esophageal balloon catheter (esophageal ulcerations, tumors, diverticulitis, bleeding varices or in patients with sinusitis, epistaxis or recent nasopharyngeal surgery), severe thrombocytopenia (platelet count \< 30) or coagulopathy (INR \> 3 or on oral anticoagulants).~4. Pre-enrollment ICP \> 20 mm Hg~5. Pre-enrollment CPP \< 60 mm Hg~6. Planned change in the external ventricular drain set point during the pre-intervention, intervention or post-intervention periods~7. Incarceration~8. Variation in ICP of \> 2 cm H2O in the hour prior to intervention.

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

Study Arms:
- Esophageal Balloon catheter (Type: EXPERIMENTAL): All patients will have an esophageal balloon catheter inserted into their nare while upright (head of bed \> 30 degrees) to a depth slightly more than the estimated distance from the lower sternum to the back of the ear (typically around 60 cm). Gastric positioning will be confirmed with abdominal compression testing and the catheter then retracted 10 - 20 cm into the lower esophagus. Placement will be confirmed with the presence of cardiac oscillations on the esophageal probe. The probe will then be secured to the patient's nasal opening using tape.

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