Rustad P, Lund P K
Dr. V. Fürst Medical Laboratory, Oslo, Norway.
Eur J Haematol Suppl. 1990;53:19-21. doi: 10.1111/j.1600-0609.1990.tb01522.x.
External quality assessment and internal quality control in hematology is complicated by the lack of good control materials. Commercial materials do not always behave as patient blood and they are expensive. Patient specimens are unstable, but may be used either within certain time limits or as in Bull's moving average for red cell indices. We have used retained patient specimens for internal quality control supplemented by a commercial control material. Three patient-specimens were run alternatively on a Technicon H1 and a Coulter 880 at regular intervals. The variations for each instrument and between instrument were computed. We used the 2 of 3 (2s) control rule. Our conclusion is that the Coulter 880 had an overall better performance than the Technicon H1 when using retained patient specimens. But both instruments practically met suggested analytical goals.
血液学中的外部质量评估和内部质量控制因缺乏优质的对照材料而变得复杂。市售材料的表现并不总是与患者血液一致，而且价格昂贵。患者标本不稳定，但可以在特定时间限制内使用，或者用作红细胞指数的布尔移动平均值。我们使用留存的患者标本进行内部质量控制，并辅以市售对照材料。每隔一定时间，在Technicon H1和库尔特880仪器上交替检测三份患者标本。计算了每台仪器以及两台仪器之间的差异。我们采用了3中2（2s）控制规则。我们的结论是，在使用留存的患者标本时，库尔特880的整体性能优于Technicon H1。但两台仪器实际上都达到了建议的分析目标。
