This lesson talks about the phases of laboratory screening (before testing, testing, after testing) and provides a summary of the value of all pre-analytical processes in gathering a valid sample. This is a vital element for all health specialists to understand because these variables straight affect the quality of the laboratory sample and the validity of the test results. This lesson is presented in an easily reasonable way and is meant for trainees, phlebotomists, cna’s, nurses, physicians and other health care specialists.
http://phlebotomycareertraining.org/phlebotomy-lesson-1-5-pre-analytical-variables/
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