Please assess the completion status of the following clinical trial:

Trial Title: Nasal High Frequency Ventilation in Preterm Infants: A Pilot Study

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE1
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* birthweight less than 1500 g~* Age \>7 days~* Free of severe intraventricular hemorrhage (Grade III-IV)~* requiring nasal continuous positive airway pressure with a stable compensated respiratory acidosis (pH 7.25 - 7.45, pCO2 \> 43 mm Hg),~* medically stable.~Exclusion Criteria:~* major congenital anomalies

- Gender: ALL
- Minimum Age: 7 Days
- Maximum Age: 3 Months
- Healthy Volunteers: f

Study Arms:
- Nasal High Frequency Ventilation (Type: EXPERIMENTAL): Stable infants born at less than 1501 g who are at least 7 days old and undergoing nasal continuous positive airway pressure treatment.

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