Use of inhaled nitric oxide in preterm vs term/near-term neonates with pulmonary hypertension: results of the PaTTerN registry study
2021
OBJECTIVE To evaluate inhaled nitric oxide (iNO) in preterm (PT) vs term/near-term (TNT) neonates with hypoxic respiratory failure (HRF) and pulmonary hypertension (PH) in an observational registry (PaTTerN). STUDY DESIGN Non-inferiority study comparing PT neonates of GA ≥ 27 to <34 weeks vs TNT neonates of GA ≥ 34 to ≤40 weeks with HRF associated with PH, who received iNO for 24-96 h during the first 0-7 days after birth. Primary endpoint: Achieving ≥25% decrease in oxygenation index/surrogate oxygenation index during iNO treatment. RESULTS Of 140 neonates (PT, n = 55; TNT, n = 85), the primary endpoint was achieved in 50 (90.9%) PT vs 75 (88.2%) TNT neonates (difference [95% CI]: 0.027 [-0.033, 0.087]); PT neonates achieved non-inferiority interval, and the study was stopped early based on prespecified criteria. CONCLUSIONS Use of iNO for improving oxygenation in PT neonates with HRF associated with PH is at least as effective as in TNT neonates. CLINICAL TRIAL REGISTRATION #NCT03132428, registered April 27, 2017.
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