Please assess the completion status of the following clinical trial:

Trial Title: Effect of Intrathoracic Pressure Regulation on Decreased Cerebral Perfusion (4hour)

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

Eligibility Criteria:
Inclusion Criteria:~* ≥18 years of age~* intubated and mechanically ventilated on a volume controlled mode~* head injury or other intracranial pathology and compromised cerebral perfusion~* arterial line in place or alternative with continuous pressure monitoring~* SpO2 ≥90%~* mean arterial pressure \>55~* admission to ICU or about to undergo neurosurgery with planned placement of an invasive intracranial pressure monitor~* inclusion presents no significant delays to planned emergent neurosurgery~* prior written informed consent~Exclusion Criteria:~* cardiac or pulmonary injury~* confirmed pneumothorax or hemothorax~* serious neck injury resulting in neck swelling with jugular venous compression~* evidence of ongoing uncontrolled bleeding~* respiratory disease such as COPD, interstitial lung disease, or other parenchymal or pulmonary vascular disease~* marked hypertension at time of device use defined as systolic blood pressure \>180 mmHg~* congestive heart failure~* women with positive serum or urine pregnancy test or breast feeding

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

Study Arms:
- ITPR (Type: EXPERIMENTAL): Use of the ITPR for 240 minutes.

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