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Solid phase microextraction (SPME) is a technique widely used and accepted in the field of food technology and in environmental and biological analyses. Despite its numerous advantages over older analytical methods, it has not been studied extensively in the medical sciences. Tranexamic acid (TXA) is currently the sole antifibrinolytic agent used during cardiac surgery involving the use of cardiopulmonary bypass (CPB). The current standard method of measuring TXA in plasma is based on plasma protein precipitation (PPP), but this analytical approach is time-consuming and not practical for routine use. The aim of the current study was to compare plasma TXA levels measured with the PPP method vs those acquired with the novel, highly efficient SPME technique. We also investigated the use of automated SPME with the aim of improving the technique so it could be used efficiently for measuring plasma TXA levels.

Use of a novel technique, solid phase microextraction, to measure tranexamic acid in patients undergoing cardiac surgery