BLOOD COAGULATION ANALYZER AND BLOOD COAGULATION ANALYSIS METHOD

A blood coagulation analyzer is provided by which, while the measurement using reagent for measuring a Fbg (fibrinogen concentration) is being minimized, the result of a measurement such as a PT measurement can be used to accurately acquire a fibrinogen concentration. The blood coagulation analyzer (1) includes a detecting section for detecting a transmitted light intensity from a first measurement sample prepared from a blood and a PT measurement reagent; a dFbg acquisition means for acquiring, based on the light detected from the first measurement sample, a dFbg value reflecting a Fbg in the blood; a determination means for determining whether the dFbg value is within a predetermined range or not; a detecting section for detecting a transmitted light intensity from a socend measurement sample prepared from the blood and a dFbg measurement reagent when the dg value is outside the predetermined range; and a Fbg acquisition means for acquiring, based on a transmitted light intensity from the second measurement sample detected, a Fbg concentration in the blood sample.