Objectives: To compare procedural safety and success outcomes between catheter placement for minimally invasive surfactant therapy (MIST) and tracheal intubation (TI) for surfactant, and to identify characteristics associated with improved procedural outcomes among patients treated with MIST.
Study design: We conducted a retrospective, multi-center, observational, matched cohort study from an international airway registry from 2016-2024. Patients treated with MIST and patients who received TI for surfactant without paralytic premedication, were matched 1:1 on gestational age, procedure location, and laryngoscope type. The primary outcome was severe oxygen desaturation (>20% SpO2 decrease). Secondary outcomes included SpO2 <80%, any adverse event, and first attempt success. Using conditional logistic regression, the association between procedure type and outcomes was assessed. Among patients who received MIST, a multiple logistic regression model assessed the association between procedural characteristics and outcomes.
Results: There were 383 patients treated with MIST matched to 383 patients who underwent TI for surfactant. Compared with TI, MIST procedures were associated with lower adjusted odds of severe oxygen desaturation (aOR 0.66, 95% CI 0.45-0.97) and SpO2 <80% (aOR 0.59 95% CI: 0.40-0.85) and higher odds of first attempt success (aOR 2.93 95% CI 1.94-4.43). Odds of adverse events did not differ (aOR 0.88 95% CI 0.50-1.56). Factors associated with improved MIST outcomes included video laryngoscopy, first airway provider, commercial catheter type, and patient weight.
Conclusions: MIST is associated with improved procedural safety and success compared with TI for surfactant. Several factors are associated with improved MIST procedural outcomes.
Objectives: To evaluate whether preterm birth is associated with impaired airway and parenchymal lung function and whether early physiological phenotypes change or are sustained during follow-up during infancy.
Study design: We included125 infants born preterm who underwent forced expiratory flow at 75% (FEF75), expired forced vital capacity, lung diffusion (DL), and alveolar volume measured longitudinally after discharge from the neonatal intensive care unit.
Results: The average gestational age of the cohort was 31 weeks (range, 25-36), 52% were female, and 36% were diagnosed with bronchopulmonary dysplasia. Length and lung function were evaluated at mean corrected ages of 5.4 and 13.6 months, visit 1 and visit 2, respectively. Significant increases occurred in body length (11.82 cm), FEF75 (94.3 mL/s), forced vital capacity (149 mL), DL (147 mL/min/mm Hg), and alveolar volume (254 mL) (P < .01 for each parameter). When quantified by z-scores based on full-term infants, the Δz-length increased significantly (P < .01); however, there were significant decreases in Δz-FEF75 and Δz-DL (P < .01). Lower FEF75 and DL values at visit 1 were associated with lower values at visit 2, but were not associated with gestational age or bronchopulmonary dysplasia.
Conclusions: After preterm birth, absolute values for lung function increased during infancy; however, when expressed as z-scores, values were persistently impaired and became more negative relative to full-term infants. Airway and parenchymal function may be established early after preterm birth and may contribute to impaired trajectories or dysanapsis later in life.

