discuss the use, purpose and evaluation of Westguard Rules alongwith interpretation of histogram results. What are the WestguardRules and how should they be used to assess quality controlresults? What are the various types of preanalytical, analyticaland postanalytical sources of error and how can these potentialsfor error be reduced? What responsibility do lab managers have inensuring the quality of testing results and what are some qualityprocesses that should be implemented?
