急性循环衰竭病人动脉血和混合静脉血CO2分压差[P（a-v）CO2]增大，并且与心脏指数（CI）相关。由于中心静脉（CV）血比肺动脉（PA）血容易得到，为此，研究者对P（a-PA）CO2和P（a-cv）CO2进行了比较，并研究了这两个CO2分压差与CI的相关关系。观察对象为37例连续入院的体温正 Acute circulatory failure in patients with arterial and mixed venous partial pressure of CO2 [P (a-v) CO2] increased, and with the cardiac index (CI) related. Because central venous blood (CV) is more readily available than PA, the researchers compared P (a-PA) CO2 and P (a-cv) CO2 and studied both CO2 partial pressures Correlation between poor and CI. The observation object was 37 cases of continuous admission body temperature positive