Jacobsen E, Gøthgen I
Acta Anaesthesiol Scand. 1985 Feb;29(2):198-202. doi: 10.1111/j.1399-6576.1985.tb02185.x.
Carbon dioxide tension was measured on heated skin surface (PSCO2) and in arterial blood (PaCO2) in eight adult patients during intermittent positive pressure ventilation. A total of 299 PaCO2-PSCO2 measurements were performed at electrode temperatures of 45 degrees C, 43 degrees C and 38 degrees C. The PSCO2-PaCO2 relation was evaluated using: 1) linear regression, 2) PSCO2/PaCO2 ratio and 3) temperature correction methods. Both linear regression and ratio indicate temperature dependency of the PSCO2-PaCO2 relation. The temperature correction method was done with a blood PCO2 temperature coefficient of 4.6% per degrees C and at two temperatures: electrode temperature (according to Severinghaus) and estimated capillary blood temperature. The results indicate that the relation between PaCO2, PSCO2 and electrode temperature is constant enough to permit estimation of PaCO2 from PSCO2 during stable circulatory conditions.
在八名成年患者进行间歇正压通气期间，测量了加热皮肤表面的二氧化碳分压（PSCO2）和动脉血中的二氧化碳分压（PaCO2）。在电极温度为45摄氏度、43摄氏度和38摄氏度时，共进行了299次PaCO2 - PSCO2测量。使用以下方法评估PSCO2 - PaCO2关系：1）线性回归，2）PSCO2/PaCO2比值，以及3）温度校正方法。线性回归和比值均表明PSCO2 - PaCO2关系与温度有关。温度校正方法采用血液PCO2温度系数为每摄氏度4.6%，并在两个温度下进行：电极温度（根据Severinghaus方法）和估计的毛细血管血温度。结果表明，在稳定循环条件下，PaCO2、PSCO2与电极温度之间的关系足够恒定，足以根据PSCO2估计PaCO2。
