A 严重的低氧血症 B
PaO<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230213/7670164_0.gif">/FiO<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230213/7670164_0_1.gif">小于200 C
X线胸片示肺水肿 D
面罩吸氧后PaO<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230213/7670164_0_2.gif">无明显增加 E
PCWP小于18cmH<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230213/7670164_0_3.gif">O