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How to establish mean and acceptable QC ranges? According to the CLSI 24-A3 guidelines, the current recommendations are to measure the QC material a minimum of 20 times on 20 separate days In practice, the ideal 20 measurements performed on 20 different days may not be possible and all laboratories face situations or scenarios that could hinder fulfilling this requirement
Improving existing QC practices - Medical Laboratory Observer One of the most important tasks in quality control is establishing a QC target and range, or standard deviation (SD), for controls Both the mean and the SD must be estimated by the lab when starting with a new quality control lot
Questions about Quality Control? Ask our Expert Panel 20 This question pertains to Dr Baumann's qc rules Just wondering when you are running your repeat after you have your warning rule, are you using fresh qc or are you advising your staff to use the same qc as your initial run?
Questions about QC for Multiple Instruments and . . . - Westgard In this world of ever-increasing volume and ever-consolidating labs, there is a growing desire to "simplify" QC designs by using similar means and similar SDs for multiple methods, instruments, and laboratories Is this really a good idea? What are the the benefits? What are the risks?
How to Design a Multiple Instruments QC Procedure A single QC target and a single QC SD can be combined in a QC design for multi-instrument testing the same analyte When instruments have similar performance, the single QC SD can be selected to have a matching false rejection rate while maintaining the risk advantages of using a single QC target
Six QC recommendations to consider today - Bio-Rad One way to be alerted to intra-laboratory between-instrument bias changes is to use the same QC target and QC rule on each instrument 6 This practice restricts the drift of an instrument in the direction of its bias with respect to the group, but allows more drift in the direction away from the bias with respect to the group
Internal Quality Controls in the Medical Laboratory: A . . . Consequently, the mean value for a given concentration level of a given IQC material for a laboratory parameter in a medical laboratory (i e , the lab mean) can be compared to the mean IQC value of a peer group (i e , the group mean) [2]