Clinical Biochemistry

Dublin Core


The pre-analytical phase is defined as the period from the physician’s indication of the test up to the laboratory
analysis of the biological material. In other words, this phase involves an individual’s preparation for collection of the biological material, the collection itself, storage of the collected sample and its transport to the laboratory, and preparation of the sample for the assay. The importance
of this phase is also supported by many publications mentioning the fact that up to 46–68 % of erroneous
results are caused by failure to follow or respect the
pre-analytical phase rules.
That is why the primary task of the laboratory is to provide clients with all necessary instructions (on patient preparation, sample collection, biological material storage and transport, pre-analytical sample treatment) so as to minimize the risk of errors that could consequently cause harm to the patient. All this information is summarized in the manuals of testing laboratories.



Rahmah Agustira


Creative Commons






Vladimír Bartoš et al., “Clinical Biochemistry,” Open Educational Resources (OER) , accessed April 16, 2024,

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