What purpose does a Levey-Jennings chart serve?

A Levey-Jennings chart serves as a vital tool in the laboratory setting by specifically recording daily quality control values. This chart enables laboratory professionals to visually assess the performance of their assays over time. By plotting the quality control results, one can easily identify variations, trends, and potential shifts in the analytical processes.

The Levey-Jennings chart typically displays the mean (average) control values along with control limits, often represented as ±2 standard deviations from the mean. This allows for a quick visual assessment of whether the quality control results fall within the acceptable ranges. If results fall outside of these limits, it may indicate that there is a problem with the test or assay, prompting further investigation.

While tracking patient outcomes, analyzing lab result trends, and calculating median values are certainly important aspects of laboratory practice, the specific function of the Levey-Jennings chart is to monitor and maintain the quality control process, ensuring that laboratory results are reliable and accurate.