Szillat P
Institut für Pathologische, Bereichs Medizin Charité der Humboldt-Universität, Berlin/DDR.
Z Erkr Atmungsorgane. 1990;174(1):46-50.
To determine the primary test parameters pH, pCO2 and pO2 one blood sample smaller than 250 microliters is necessary. In general the computer aided check of analyser's functions ensures a high quality of analytic. Nevertheless measurements can be erroneous. Therefore a control independent of the analyser's one is necessary. Blood equilibrated with defined test gases is recommended as control material for pCO2 and pO2 measurement. For control of pH measurement buffer solutions are to be used. The comparison of several analysers is an alternative method of quality control. The approximated validity of computed parameters is explained by the way of the examples oxygen saturation (O2sat) and oxygen concentration (cO2). To calculate them exactly some complemental informations (P0.5, cHb) would be needed. These informations can not be estimated by blood gas analysis. It is pointed to the different importance of the parameters pO2, O2sat and cO2 for evaluation of lung function and oxygen supply in tissue.
为测定主要检测参数pH、pCO2和pO2，需要一份体积小于250微升的血样。一般来说，分析仪功能的计算机辅助检查可确保分析的高质量。然而，测量仍可能出现误差。因此，需要一种独立于分析仪的质控方法。建议使用与特定测试气体平衡的血液作为pCO2和pO2测量的质控材料。对于pH测量的质控，应使用缓冲溶液。比较多个分析仪是质量控制的另一种方法。通过氧饱和度（O2sat）和氧浓度（cO2）的示例来说明计算参数的近似有效性。为精确计算这些参数，需要一些补充信息（P0.5、cHb）。这些信息无法通过血气分析估算。文中指出了pO2、O2sat和cO2参数在评估肺功能和组织氧供应方面的不同重要性。
