Blood carbon dioxide that is the partial pressure of carbon dioxide, the normal value of 35-45mmHg, low on behalf of hyperventilation, commonly found in asthma, high fever and other diseases of the patient, how to deal with, but also need to be combined with the degree of carbon dioxide partial pressure of the patient’s lowering of the specific analysis: 1. The partial pressure of carbon dioxide is slightly lower than normal: at this time, the patient more weakness, nausea and other discomforts, but the mental condition is still good, normal consciousness, such patients can use a plastic bag to cover the mouth and nose to breathe, artificially increase the concentration of carbon dioxide in the respiratory gas, to improve the situation of low partial pressure of carbon dioxide; 2. Carbon dioxide partial pressure is far below the normal value: when the carbon dioxide partial pressure is far below the normal value, the patient’s respiratory alkalosis is serious, and there may be blurring of consciousness, obstacles, etc. This kind of patient’s situation is more serious, and needs to be mechanically ventilated immediately. In addition to improving the partial pressure of carbon dioxide, but also actively carry out the treatment of primary diseases such as asthma, pneumonia, high fever and other diseases, how to deal with the primary diseases need to be treated by the doctor combined with the patient’s specific situation to develop appropriate treatment programs, the patient should actively cooperate with the doctor to carry out treatment.