Bateman N T, Musch T I, Smith C A, Dempsey J A
Respir Physiol. 1980 Aug;41(2):217-26. doi: 10.1016/0034-5687(80)90054-7.
The PCO2 of tonometered human blood was measured with three different Radiometer PCO2 electrodes mounted in three different blood gas analysis systems. When the PCO2 electrode was calibrated with humidified gases it measured the PCO2 of gases accurately but showed a consistent error measuring the PCO2 of human blood. This error was reduced but not abolished by calibrating the electrodes over a wide range of PCO2 and by measuring each sample repeatedly. The PCO2 of human blood was measured accurately by electrodes calibrated with tonometered human blood or buffer. The electrode responded differently to gas and human blood. This could not be explained by an electrode memory effect or by exchange of CO2 between the sample and the electrode. When human, rat, dog and goat blood were tonometered and measured under identical conditions, the difference between gas and blood PCO2 varied. The error of measurement in all species was greatest at high PCO2.
使用安装在三种不同血气分析系统中的三种不同的雷度PCO₂电极，测量了人体校准血液的PCO₂。当用湿化气体校准PCO₂电极时，它能准确测量气体的PCO₂，但在测量人体血液的PCO₂时显示出一致的误差。通过在广泛的PCO₂范围内校准电极并重复测量每个样本，该误差有所减小但并未消除。用校准过的人体校准血液或缓冲液校准的电极能准确测量人体血液的PCO₂。电极对气体和人体血液的反应不同。这无法用电极记忆效应或样本与电极之间的CO₂交换来解释。当在相同条件下对人、大鼠、狗和山羊的血液进行校准和测量时，气体和血液PCO₂之间的差异各不相同。在所有物种中，测量误差在高PCO₂时最大。
