Westgard rules

West·gard rules

(west'gahrd rūlz)
A quality control protocol that allows detection of random and systematic error. The protocol includes the 12-s, 13-s, 22-s, R-4s, 4-1s, and 10 ×rules.
References in periodicals archive ?
Westgard rules were applied for the interpretation of daily internal quality control results.
TARGET SCORE OF RIQAS AND SIGMA METRICS FOR EVALUATING THE ANALYTICAL PERFORMANCE OF THYROID FUNCTION TESTING ON ADVIA CENTAUR XPT IMMUNOASSAY ANALYSER
Examples include QA on reagents, lot numbers, expiration dates, testing accuracy, Westgard rules, and test results directly incorporated into the laboratory information system (LIS) which are stored directly within the patient case.
The pros and cons of point-of-care testing vs laboratory testing
Quality control was ensured using internal quality control kits, Levey-Jennings charts based on lab-derived mean and standard deviation, corrective action on violations of Westgard rules, and subscribed external quality controls.
Evaluation of the diabetes in pregnancy study group of India criteria and Carpenter-Coustan criteria in the diagnosis of gestational diabetes mellitus/Gestasyonel diabetes mellitus tanisinda Hindistan kriterleri ve Carpenter-Coustan kriterleri ile gebelik calisma grubunda diyabetin degerlendirilmesi
Linnet has compared a "mean rule," closely related to Stouffer method, with traditional Westgard rules. Given the same type-I error, the mean rule was more powerful for detection of shifts of location than Westgard rules (38).
Stronger Together: Aggregated Z-values of Traditional Quality Control Measurements and Patient Medians Improve Detection of Biases
On applying Westgard rules on the internal quality control data of protein all runs were acceptable at both control levels.
Estimation of uncertainty measurement - A prerequisite of ISO1589 accreditation for clinical laboratories
11 built-in quality control program - the possibility of graphical representations of control, the possibility of Westgard rules
Supply of laboratory reagents
Sophisticated user-definable display of QC results should include Levey-Jennings plots and interactive display of violations of user-selected rules, such as Westgard rules.
The ideal laboratory information system
Westgard Rules. Available: http://www.westgard.com/westgard-rules [accessed 4 February 2010].
Perinatal exposure to low doses of dioxin can permanently impair human semen quality
Mention is made of Levey-Jennings charts and Westgard Rules but there is really no mention of how to use these tools in the context of day-to-day blood gas laboratory operation.
Clinical blood gases: Assessment & Intervention, 2nd edition
With advanced middleware solutions, laboratorians can set rules, defining QC protocols for each analyte based on QC metrics such as Westgard rules. Trained laboratory staff members can set middleware rules that inform all staff of QC issues, or automatically stop autovalidation.
Enhancing QC protocols through automation: Emerging technologies advance care and efficiency by streamlining QC maintenance
Quality control using Westgard rules of graphical presentation and statistical evaluation of audit results.
lease hematology analyzer for the determination and the supply of reagents and consumables
Usually, this is done in conjunction with what's called the Westgard Rules, which are a convention that an instrument run and all its results should be scrutinized if any one control exceeds 2s from the mean (known as a 1(2s) violation).
Applications of control charts in the molecular lab
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