休哈特和累积和联合控制图提高临床检验质量控制水平

Combined Shewhart-Cusum Control Chart for Improved Quality Control in Clinical Laboratory

目的 本文描述了改编的决定限累积和方法应用于临床检验质量控制。方法 累积和方法的累积和是根据数字限而不使用V型模板来进行解释。该方法在计算机化质量控制系统或手工控制图上易于完成。本研究主要是手工应用并证明如何在已有的Shewhart(休哈特 )质控图上执行这一方法。结果 在单一质控制图上同时使用累积和及Shewhart质控规则 ,也可简化累积和方法的计算。计算机模拟研究几种单个累积和规则以及与Shewhart联合规则的性能特征。研究表明通过累积和方法和Shewhart控制图的联合应用能改善存在的质量控制系统。结论 在实验室手工质量控制系统上引入累积和方法具有其优点。

Objective We describe the adaptation of the decision limit cumulative sum method (CUSUM) to internal quality control in clinical laboratory.Methods With the decision limit method,the cusum is interpreted against a numerical limit,rather than by use of a V-mask.The method can be readily implemented in computerized quality-control systems or manually on control charts.We emphasize the manual application here and demonstrate how the technique can be implemented on existing Shewhart control charts.Results This permits both cusum and Shewhart control rules to be used simultaneously on a single control chart and also minimizes the data calculations necessary for the cusum method.Computer simulation studies are used to determine the performance characteristics of several different cusum rules,alone and in combination with a Shewhart rule.These studies indicates that improvements in existing quality-systems should be possible by additon of this simple cusum method and by use of a combined Shewhart-cusum control chart.Conclusion This should be particularly advantageous when introducing the cusum method in laboratories with manual quality-control systems.