Effect of Synchronized vs. Continuous HFNC Using NAVA on WOB in Infants With BPD

Patients will be randomized to begin the study with either NAVA-synchronized or continuous HFNC. Each patient will receive two 15-minute trials at different levels of continuous HFNC and two 15-minute trials at corresponding levels of synchronized HFNC. In synchronized HFNC, using the NIV NAVA mode on the ventilator each subject will receive a constant minimum flow, but with each neurally triggered breath (as measured with an Edi catheter), an additional flow will be given to the patient. This differs from continuous HFNC in which the subject receives a constant flow without variation. Subjects will be observed during the entirety of these trials. Values for the primary and secondary outcomes will be monitored, recorded, and calculated.