<prompt> The ideal tidal volume in a patient ventilated for ARDS is-6 mLkg10 mLKgl4 mLkg2O mLkg  <response>: The ideal tidal volume in a patient ventilated for ARDS is 6mLkg predicted body weight.Moality was significantly lower in this low TV patients31 compared to the conventional TV 12 mLkg predicted body weight ventilation40. Despite its life-saving potential mechanical ventilation can aggravate lung injury in severe ARDS patients. Ventilator-induced lung injury arises from two principal mechanisms: Volutrauma from repeated alveolar overdistension from excess tidal volume; Atelectrauma from recurrent alveolar collapse. Reference: Harrisons Medicine,20thedition, page no:203 