Le Souëf P N, Morgan A K, Soutter L P, Reynolds E O, Parker D
Acta Anaesthesiol Scand Suppl. 1978;68:91-7. doi: 10.1111/j.1399-6576.1978.tb01400.x.
Transcutaneous oxygen tension (tcPO2) measured by two skin electrodes of different design, and arterial oxygen tension (PaO2) measured by an intravascular oxygen electrode, were continuously compared for periods of 6--27 h in 45 newborn infants with respiratory illnesses. One skin electrode (Dräger) had three microcathodes surrounded by a heated ring-shaped anode and the other (Roche) a large heated cathode. The electrodes were calibrated in vitro; 44 degrees C was found to be a suitable electrode temperature for the estimation of Pao2. tcPo2 recorded by the electrode with the microcathodes estimated Pao2 reasonably accurately for 6 h without the necessity for re-siting. tcPao2 recorded by the electrode with the large cathode gave a similar estimate of Pao2 for 3 h, but then tcPao2 often fell relative to Pao2. This fall was probably caused by skin changes at the electrode site. Poor skin perfusion causing underestimation of Pao2 by tcPo2 could not be identified by a number of methods tried.
在45例患有呼吸系统疾病的新生儿中，连续6至27小时比较了通过两种不同设计的皮肤电极测量的经皮氧分压（tcPO2）和通过血管内氧电极测量的动脉氧分压（PaO2）。一种皮肤电极（德尔格）有三个微阴极，周围是一个加热的环形阳极，另一种（罗氏）有一个大的加热阴极。电极在体外进行了校准；发现44摄氏度是估计Pao2的合适电极温度。带有微阴极的电极记录的tcPo2在6小时内相当准确地估计了Pao2，无需重新放置电极。带有大阴极的电极记录的tcPao2在3小时内对Pao2给出了类似的估计，但随后tcPao2相对于Pao2经常下降。这种下降可能是由电极部位的皮肤变化引起的。通过尝试的多种方法无法识别因皮肤灌注不良导致tcPo2低估Pao2的情况。
