Non-Invasive Surfactant Administration in Preterm Infants

Abstract

Background: Although surfactant replacement therapy has been a cornerstone of respiratory distress syndrome (RDS) management for decades, traditional delivery via endotracheal intubation and mechanical ventilation is associated with procedure-related complications and increased risk of bronchopulmonary dysplasia (BPD). These concerns have driven the development of less invasive surfactant administration strategies.

Objective: This review aims to summarize and evaluate the current literature on less invasive surfactant delivery techniques used in preterm infants with RDS, with a focus on their feasibility, efficacy, and short- and long-term neonatal outcomes.

Methods: We reviewed the available literature evaluating less invasive surfactant administration methods, including InSurE, Less Invasive Surfactant Therapy/Minimally Invasive Surfactant Therapy (LISA/MIST), surfactant administration via laryngeal mask airway (SALSA/LMA), pharyngeal administration, and nebulized surfactant. We compared major outcomes, namely the need for mechanical ventilation, incidence of BPD, procedural complications and long-term neurodevelopmental outcomes.

Results: Non-invasive surfactant administration techniques have been associated with reduced exposure to mechanical ventilation and lower rates of BPD compared with conventional approaches. Studies on LISA/MIST demonstrate the most consistent evidence in reducing the need for mechanical ventilation and BPD, while other techniques such as LMA-assisted delivery and nebulization show promise but remain limited by device constraints, gestational age applicability, and heterogeneous study designs. Long-term neurodevelopmental outcome data remain sparse across all techniques.

Conclusions: Non-invasive surfactant administration represents an important advancement in the management of RDS. While several techniques offer potential advantages over traditional intubation-based delivery, further high-quality studies are required to optimize patient selection, standardize techniques, develop safe and effective delivery devices, and evaluate long-term neurodevelopmental outcomes.

Keywords: BPD; InSurE; LMA; RDS; SALSA; nebulization; oropharyngeal; preterm; respiratory distress syndrome; surfactant.