For an analytical validation of the method for the determination of blood hosphatidylethathanol, it is necessary to: * to compare the results of chronic and excessive ethanol patients with the cut-off proposed in the literature. * Also assess the stability of phosphatidylethanol in total blood collected, and in blotted dried blood stains (DBS), depending on temperature (ambient temperature and +4°C)
Study Type
OBSERVATIONAL
Frequency of patients with a Peth concentration greater than 200 µg/L
Time frame: at the end of study (at 6 months)
the concentration of Peth in blood in ambiant temperature
descrease expressed as a percentage of the initial concentration, in the primary blood tube (citrate tube) and stored at room temperature,
Time frame: between T0 and 96h and the end of study (at 6 months)
the concentration of Peth in blood at 4°C
ecrease expressed as a percentage of the initial concentration, in the primary blood tube (citrate tube) and at 4°C.
Time frame: between T0 and 96h and the end of study (at 6 months)
the concentration of Peth in blood in DBS
decrease expressed as a percentage of the initial concentration, in the Dried Blood Spot (DBS)
Time frame: between T0 and 4 weeks and the end of study (at 6 months)
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