Jansen C A, Bass F G, Lowe K C, Nathanielsz P W
Am J Obstet Gynecol. 1980 Nov 15;138(6):670-6. doi: 10.1016/0002-9378(80)90086-1.
Continuously monitored carotid arterial PO2 (PaO2) and transcutaneous PO2 (tcPO2) from the scalp of fetuses from ewes not in labor have been compared under epidural anesthesia at different levels of fetal oxygenation. A reasonably good correlation existed between the two readings at normal and high PO2 values. In sharp contrast, at low PaO2 levels there was a considerable bias between the two. Since this bias was variable, the failure of tcPO2 to reflect PaO2 accurately at low PaO2 renders the use of the tcPO2 electrode questionable in the very situation for which it was advocated, namely, the prediction of fetal compromise.
在硬膜外麻醉下，对未分娩母羊胎儿头皮的颈动脉血氧分压（PaO2）和经皮血氧分压（tcPO2）进行连续监测，并在不同胎儿氧合水平下进行比较。在正常和高PaO2值时，两种读数之间存在相当好的相关性。形成鲜明对比的是，在低PaO2水平时，两者之间存在相当大的偏差。由于这种偏差是可变的，在低PaO2时tcPO2不能准确反映PaO2，这使得在其被提倡使用的特定情况下，即预测胎儿窘迫时，tcPO2电极的使用存在疑问。
