Also,the value of pH of arterial(PHa),pressure of arterial oxygen(PaO2),pressure of arterial carbon dioxide(PaCO2)and lactic acid(Lac) were measured spontaneously.

• 同步测定动脉血pH值(pHa)、氧分压(PaO2)、二氧化碳分压(PaCO2)、乳酸(Lac),测定呼吸机面板上潮气量,并用标尺法了解患者主观感受。