A.PaO2<65mmHg和(或)伴有PaCO2>55mmHg B.PaO2<50mmHg和(或)伴有PaCO2>60mmHg C.PaO2<60mmHg和(或)伴有PaCO2>5mmHg D.PaO2<60mmHg和(或)伴有PaCO2>50mmHg E.PaO2<65mmHg和(或)伴有PaCO2>50mmHg
A.促進肺泡水腫消退 B.增加功能殘氣量 C.減少肺內動靜脈分流 D.增加吸入氧濃度 E.擴張萎陷的肺泡