临床各科危重病人由于多脏器功能损害，特别是肺和肾脏功能障碍，常可并发动脉血气异常和酸碱失衡，其后者又常可反过来影响各脏器功能，有时成为病人致死的直接原因。及时、正确地识别和处理危重病人的异常动脉血气变化和酸碱失衡，常是抢救危重病人生命的关键因素之一。本文? Critically ill patients in clinical departments due to multiple organ dysfunction, especially lung and kidney dysfunction, often complicated by arterial blood gas abnormalities and acid-base imbalance, which in turn can often affect the function of various organs, and sometimes become the patient’s lethal direct cause. Timely and correctly identify and deal with abnormal arterial blood gas changes and acid-base imbalance in critically ill patients is often one of the key factors in the rescue of critically ill patients. This article?