Please assess the completion status of the following clinical trial:

Trial Title: Variable Pressure Support Trial

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Age ≥ 18 years~* Duration of controlled mechanical ventilation ≥ 24h~* Availability of a Infinity V500 ventilator (ready to use)~* Informed consent according to local regulations~* Temperature ≤ 39 °C~* Hemoglobin ≥ 6 g/dl~* PaO2/FIO2 ≥ 150 mmHg with positive end-expiratory pressure (PEEP) ≤16 cmH2O~* Ability to breath spontaneously~Exclusion Criteria:~* Participation in another interventional trial within the last four weeks before enrollment in this trial~* Peripheral neurological disease associated with impairment of the respiratory pump~* Muscular disease associated with impairment of the respiratory pump~* Instable thorax with paradoxical chest wall movement~* Planned surgery under general anesthesia within 72 hours~* Difficult airway/intubation~* Existing tracheotomy at ICU admission~* Expected survival \< 72 hours~* Home mechanical ventilation or on chronic oxygen therapy~* Suspected pregnancy

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

Study Arms:
- Variable Ventilation (Type: ACTIVE_COMPARATOR): Patients are ventilated with variable pressure support mode.
- Conventional (non-variable) Ventilation (Type: NO_INTERVENTION): Patients are ventilated with non-variable(conventional) pressure support ventilation mode.

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