Integrated echocardiography and lung ultrasound assessment of lung recruitment in preterm infants using high frequency ventilation: A prospective, single-arm, protocol-driven cohort study.

Lung recruitment maneuvers (lung recruitment maneuvers) during high-frequency oscillatory ventilation (high-frequency oscillatory ventilation) lack bedside standardized monitoring.

To evaluate the efficacy and safety of FiO 2 -guided lung recruitment maneuvers in preterm infants with moderate-to-severe respiratory-distress syndrome (respiratory-distress syndrome) using integrated functional echocardiography (functional echocardiography) and lung ultrasound (lung ultrasound).