Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Randomized Controlled Trial of BiPhasic Nasal Continuous Positive Airway Pressure (BP-NCPAP) vs. Non-invasive High Frequency Ventilation (NIHFV) Following NCPAP Failure: A Pilot Study
Brief Summary: In preterm infants, endotracheal mechanical ventilation is well known to cause various forms of lung injury including volutrauma, barotrauma and oxytrauma - collectively known as ventilator-induced lung injury (VILI). As such, there is a move towards non-invasive ventilation (NIV) in recent decades. However, many infants placed on NIV modes fail and require intubation. A relatively recent mode of NIV is non-invasive high frequency ventilation (NIHFV). Studies on this modality are scarce, but do suggest that neonates can be ventilated effectively. However, its efficacy in comparison with other existing modes of NIV remains unknown due to lack of appropriate studies. The investigators hypothesize that NIHFV is a superior NIV mode than Biphasic Nasal Continuous Positive Airway Pressure (BP-NCPAP) in preterm infants in preventing intubation following NCPAP failure.


Options:
A: Inclusion Criteria:

- Gestational age 26-32 weeks

The criteria for failure were met by at least 1 of the following:

* pH: 7.10 and PaCO2: 70 mm Hg
* Recurrent apnea with \>3 episodes (Prophylactic caffeine were used in all infants)
* Single episode of apnea that required bag-and-mask ventilation
* PaO2: 50 mmHg with a fraction of inspired oxygen of \>0.5.

Exclusion Criteria:

* Major congenital anomalies
* Presence of cardiovascular instability
* Intubation at admission to the NICU
* Consent not provided or refused
B: Inclusion Criteria:

* Greater than 72 hours post-natal age AND currently on NCPAP
* Less than 1,250 g when on NCPAP at time of enrollment

Exclusion Criteria:

* Congenital or acquired abnormality of upper airways
* Severe congenital anomalies including cyanotic congenital heart disease
* Severe nasal excoriation/injury preventing use of NIV interface
* Greater than 2,000 grams at time of randomization
C: Inclusion Criteria:

* preterm infants less than 32 weeks of gestational age
* intubated more than 48 hours after birth
* subjected to extubation with minimal ventilator setting (mean airway pressure \< 7cmH2O + peak inspiratory pressure \< 13 cmH2O + FiO2 \< 0.4 + respiratory rate \< 35/min)
* with informed consent from parents

Exclusion Criteria:

* with major congenital anomalies
* use of sedative or anesthetic drugs
* hemodynamic instability
* grade 3 or higher intraventricular hemorrhage
* phrenic nerve palsy
D: Inclusion Criteria:

* gestational age between 25+0 and 32+6 weeks;
* birth weight more than 600 g;
* supported with any type of endotracheal ventilation;
* Has not had first attempt at extubation(extubation readiness requires fulfilling of all the following criteria: a. Having received at least one loading dose of 20 mg/kg and 5 mg/kg daily maintenance dose of caffeine citrate; b. pH\>7.20 PaCO2\<=60 mmHg (these may be evaluated by arterialized capillary blood gas analysis or appropriately calibrated transcutaneous monitors. Venous blood gas values cannot be used); c. Paw \<=7-8 cmH2O; d. FiO2\<=0.30; e. sufficient spontaneous breathing effort, as per clinical evaluation).;
* Obtained parental consent. Informed consent will be obtained antenatally or upon neonatal intensive care unit admission.;

Exclusion Criteria:

* major congenital anomalies or chromosomal abnormalities;
* Presence of neuromuscular disease;
* Upper respiratory tract abnormalities; ;
* need for surgery known before the first extubation;
* Grade IV-intraventricular haemorrhage (IVH) occurring before the first extubation
* congenital lung diseases or malformations or pulmonary hypoplasia

Answer: B