Objective To investigate and evaluate the application and safety of high frequency oscillatory ventilation(HFOV) in the treatment of neonates with respiratory failure.

Objective to evaluate the therapeutic effect of high frequency oscillatory ventilation (HFOV) combined with thoracic cavity occlusive drainage on neonatal pneumothorax.

As the protective lung ventilation strategy, high frequency oscillatory ventilation (HFOV) and partial liquid ventilation have important significance.