Unformatted text preview: uality control in the laboratory begins before the sample is collected from the patient.
Accuracy arises from ensuring that the appropriate specimen is collected The correct collection vessel is used
Pertinent collection variables are considered Once the sample is collected and delivered to the laboratory errors may arise during the period before the analysis of the sample
The problem of sampling collection and processing is complex
No simple system meets all the requirements for all analytes that the clinical chemistry laboratory measures
The one method of collection and storage for a particular analyte may be invalid for another An awareness of the availability of many methods must be present
It is also important to determine the type of specimens required for a particular analyte before one begins to obtain a specimen
For example – the collection of urine for a toxic drug screen is appropriate whereas a serum sample is not Blood: Types of Specimens
Types Is Connective Tissue
It is a suspension...
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