Lui K F, Ng W Y, Thai A C
Department of Medicine, National University of Singapore.
Ann Acad Med Singap. 1990 Jul;19(4):473-6.
A new device based on amperometric measurement is currently available for diabetic patients to perform blood glucose tests for self-monitoring. The meter (Exac TechR) which comes configured as a pen, is extremely simple to use. It takes only 30 seconds for a blood glucose reading to be determined and virtually eliminates user errors commonly associated with colour reagent test-strips. An assessment of the technical aspects--precision and accuracy, was carried out in comparison with a reference analyser. Analysis of 174 venous blood samples (range 26-412mg/dl) indicated that ExacTechR gave acceptable accuracy for values greater than 151mg/dl but less accurate at less than 150mg/dl. Precision, assessed with seven glucose concentrations (52-300mg/dl), gave an average CV of 4.3% (2.6-5.2%). Data obtained from two other ExacTechR meters demonstrated similar precisions. Anticoagulants affected ExacTechR measurements. Compared to plain blood, blood glucose measurements with the ExacTechR using fluoride-oxalate, EDTA and heparinised blood, showed a mean deviation of +22%, -4% and -1.9% respectively.
目前有一种基于安培测量法的新设备可供糖尿病患者用于自我监测血糖测试。该血糖仪（Exac TechR）配置成笔状，使用极其简单。只需30秒就能测定血糖读数，并且几乎消除了与显色试剂试纸相关的常见用户误差。与参考分析仪相比，对其技术方面——精密度和准确度进行了评估。对174份静脉血样本（范围为26 - 412mg/dl）的分析表明，ExacTechR对于大于151mg/dl的值具有可接受的准确度，但对于低于150mg/dl的值准确度较低。用七种葡萄糖浓度（52 - 300mg/dl）评估的精密度，平均变异系数为4.3%（2.6 - 5.2%）。从另外两台ExacTechR血糖仪获得的数据显示出相似的精密度。抗凝剂会影响ExacTechR的测量结果。与未抗凝血液相比，使用草酸钾 - 氟化钠、乙二胺四乙酸（EDTA）和肝素化血液的ExacTechR血糖仪测量血糖，平均偏差分别为 +22%、 -4% 和 -1.9%。
