Minimally-invasive surfactant therapy in preterm infants on continuous positive airway pressure

Objective To evaluate the applicability and potential effectiveness of a technique of minimally-invasive surfactant therapy (MIST) in preterm infants on continuous positive airway pressure (CPAP). Methods An open feasibility study of MIST was conducted at two sites. Infants were eligible for MIST if needing CPAP pressure ≥7 cm H2O and FiO2 ≥0.3 (25–28 weeks gestation, n=38) or ≥0.35 (29–32 weeks, n=23). Without premedication, a narrow-bore catheter was inserted through the vocal cords under direct vision. Surfactant (100 or 200 mg/kg Curosurf) was then instilled, followed by reinstitution of CPAP. Outcomes were compared between surfactant-treated infants and historical controls achieving the same CPAP and FiO2 thresholds. Results Surfactant was successfully administered via MIST in all cases, with a rapid and sustained reduction in FiO2 thereafter. For infants at 25–28 weeks gestation, need for intubation