Control of the analytical processes in clinical laboratory: An update of the levey-jennings Control chart and westgard rules

The analytical process control is one of the tools of quality management, it is necessary to obtain results of the analytical run within a standard of reliability and accuracy, and required by existing legislation of the country. To maintain control of the analytical run is used statistical tools, and covered here charts Levey and Jennings and Westgard multi-rules, which are used in the main clinical laboratory.