Horák J, Budina M
Národní a kontrolní referencní laborator pro hematologii, Praha.
Vnitr Lek. 1997 May;43(5):279-84.
In 1994 in the Czech Republic external quality evaluation of haemograms was started. Quality was evaluated by sending control samples to laboratories and by comparing the results of their assessment with the correct value. A permitted range to results was assessed: for platelets 24%, for leucocyte 20% and for erythrocytes, haemoglobin, haematocrit and the mean corpuscular volume (MCV) 10%. The relative error of blood cell count was expressed by means of a coefficient of variance. The error declined during the period of evaluation, during the last cycle it was 4% for erythrocytes 8% for leucocytes and 10% for platelets. Assessment of haemoglobin was of all components of the haemorgram associated with the least error, assessment of the haematocrit was less successful. Least accurate were laboratories which use manual methods (success rate cca 70%), more successful were assessments made by semi-automatic analyzers for blood counts (85%), automatic analyzers were successful in 95%. The participating laboratories obtained certificates for well assessed parameters.
1994年，捷克共和国开始了血细胞计数的外部质量评估。通过向实验室发送对照样本，并将其评估结果与正确值进行比较来评估质量。评估了结果的允许范围：血小板为24%，白细胞为20%，红细胞、血红蛋白、血细胞比容和平均红细胞体积（MCV）为10%。血细胞计数的相对误差通过变异系数表示。在评估期间误差有所下降，在最后一个周期，红细胞的误差为4%，白细胞为8%，血小板为10%。血红蛋白的评估是血细胞计数所有成分中误差最小的，血细胞比容的评估则不太成功。使用手工方法的实验室最不准确（成功率约为70%），半自动血液分析仪进行的评估更成功（85%），自动分析仪的成功率为95%。参与评估的实验室获得了参数评估良好的证书。
