<prompt> Value of Pa02 Fi02 chracteristic of ARDS is200 mmHg200 - 400 mmHg400 - 600 mmHg600 - 800 mmHg  <response>: Answer- A. 200 mmHgAcute respiratory distress syndrome ARDS is a clinical symdrome of severe dyspnea of rapid onset, hypoxemia, and diffirse pulmonary infiltrates leading to respiratory failure.The aerial PaO, in mmHgFiO, inspiratory O, fraction 200 mmHg is characteristic of ARDS, while a PaO, FiO, between 200 and 300 identifies patients with ALI who are likely to benefit from aggressive therapy. 