Abstract
Aim: To describe the stability of nafamostat in infusion solutions, during blood sample collectionand in extracted plasma samples in the autosampler. Methods: Nafamostat infusion solutions were stored at room temperature in the light for 24h. For sample collection stability, fresh blood spiked with nafamostat was subjected to combinations of anticoagulants, added esterase inhibitor and temperature. Nafamostat was monitored in the extracted plasma samples in the autosampler. Results: Nafamostat was stable in infusion solutions. Nafamostat in whole blood was stable for 3h before centrifugation when collected in sodium fluoride/potassium oxalate tubes (4°C). Nafamostat in extracted plasma samples degraded at 4.7±0.7% per h. Conclusion: Viable samples can be obtained using blood collection tubes with sodium fluoride, chilling and processing promptly.
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