Search strategy
Two authors independently searched the PubMed, Cochrane Library, EMBASE,
Web of Science,CNKI, Wanfang and VIP databases from inception to April
1, 2022. We used the following search terms: ((Infant OR newborn OR
neonat* OR premature OR very low birth weight OR low birth weight OR
VLBW OR LBW) AND (Noninvasive High-Frequency Oscillatory Ventilation OR
Noninvasive High Frequency Oscillation Ventilation OR Non-invasive
high-frequency oscillatory ventilation OR NHFOV OR nHFV) AND (nasal
intermittent positive pressure ventilation OR NIPPV OR nasal
intermittent mandatory ventilation OR NIMV OR non-invasive positive
pressure ventilation OR synchronized intermittent mandatory ventilation
OR nasopharyngeal synchronized intermittent mandatory ventilation )). No
language restrictions were applied. A third author was consulted for
authors’ differences in opinion during the study selection process.