Creatine and creatinine quantification in olympic athletes: dried blood spot analysis pilot study.

Capillary dried blood spot (DBS) samples facilitate field-based collection without venipuncture. This pilot study aims to evaluate the viability of creatine (Cr) and creatinine (Crt) quantification using fresh capillary serum (Cr/Crt) and DBS samples (Cr/Crt), using Flow Injection Analysis Mass Spectrometry (FIA - MS). Nine Olympic Athletes provided a capillary blood sample to assess Cr/Crt and Cr/Crt quantified by FIA - MS.