Background: High-frequency oscillatory ventilation (HFOV) is one of lung protective strategies in acute respiratory distress syndrome (ARDS). It is not recommended to be used as initial mode of ventilation. Previous studies showed conflicting results for late use of HFOV (after prolonged period of conventional mechanical ventilation (CMV)). https://www.ealisboa.com/limited-stock-Purple-House-Arrethe-Bush-Balm-Soap-quick-super/