The pre-analytical phase is essential for the analysis result quality. This phase take place between medical prescription and analysis, and involves the sampler and his patient. Pre-analytical phase comprises all the factors that can influence sample results before its analysis.
This is a major step for measuring the quantities of the consituents of biological fluids, as well as for the diagnostic and the monitoring of some diseases. This phase is considered as the most error prone part, Indeed, 2/3 of laboratory diagnostic nonconformities are attributable to pre-analytic errors.
Nonconformities biological samples require to redo and engender additional costs of personnel, equipment, time and energy.
Any not detected or reported error during pre-analytic phase may falsify the analysis results and deacresad patient satifsfaction by doing new tests.
It is fundamental to master pre-analytical phase.