d'Hollander A, Capouet V, Czerucki R, Bomblet J P, Govaerts M J
Can Anaesth Soc J. 1984 Jul;31(4):439-43. doi: 10.1007/BF03015421.
The ability of venous pCO2 to predict arterial pCO2 within the normal range was tested by measuring pCO2 in blood sampled simultaneously from a large forearm vein (PER), from the superior vena cava (SVC), and from an artery in 35 anaesthetized patients. The relationship between arterial and both venous pCO2's were studied in a first series of 15 patients (ASA physical status class I-II) anaesthetized with methohexitone, fentanyl, pancuronium and nitrous oxide/oxygen, and in a second series of 20 patients scheduled for cardiac surgery anaesthetized with flunitrazepam, fentanyl, pancuronium and nitrous oxide. A marked correlation was found between arterial and both venous pCO2's samples in the normal patients (a/PER: r = 0.922; a/SVC: r = 0.940); in the patients with abnormal cardiovascular status the correlation observed was less pronounced (a/PER: r = 0.501; a/SVC: r = 0.507). In view of the similar correlation coefficients observed from the PER or SVC blood sampling sites, we conclude that the degree of accuracy of the prediction of paCO2 from the venous pCO2's is not modified by the origin of the venous blood. The differences between the coefficients of correlation found in the normal patients and in those with abnormal cardiovascular function indicate that venous pCO2 as estimate of paCO2 appears useful only in subjects with normal haemodynamic status.
通过对35例麻醉患者同时从一条大的前臂静脉（PER）、上腔静脉（SVC）和一条动脉采集的血液样本测量pCO₂，测试了静脉pCO₂在正常范围内预测动脉pCO₂的能力。在第一组15例用美索比妥、芬太尼、潘库溴铵和氧化亚氮/氧气麻醉的患者（ASA身体状况分级为I-II级）以及第二组20例计划进行心脏手术并用氟硝西泮、芬太尼、潘库溴铵和氧化亚氮麻醉的患者中，研究了动脉和静脉pCO₂之间的关系。在正常患者中，动脉和静脉pCO₂样本之间发现了显著相关性（a/PER：r = 0.922；a/SVC：r = 0.940）；在心血管状况异常的患者中，观察到的相关性不太明显（a/PER：r = 0.501；a/SVC：r = 0.507）。鉴于从PER或SVC采血部位观察到的相关系数相似，我们得出结论，静脉血来源不会改变根据静脉pCO₂预测动脉血二氧化碳分压（PaCO₂）的准确度。正常患者和心血管功能异常患者之间相关系数的差异表明，静脉pCO₂作为PaCO₂的估计值仅在血流动力学状态正常的受试者中似乎有用。
