Method for measuring blood coagulation and device therefor

摘要

A method and apparatus is disclosed for measuring blood coagulation factor, operating on the principle wherein the clotting time (T) of a sample of blood to which a reagent has been added is measured; and then the measured clotting time (T) is converted into a quantity (A) in accordance with the equation: log p (A + Ao) - log p (An + Ao) = B (log Q T - log Q Tn) <IMAGE> +TR <IMAGE> where: Ao is an activation value amount taken on the assumption that an apparently negative or positive residual amount of coagulation factors, which are the object of measurement, exists in a diluted blood plasma solution prepared to obtain various values of activation, unit and concentration; An is the normal or standard activation value of normal blood plasma; B is a constant used in converting from clotting time (T) into activation value; Tn is the clotting time of said normal blood; and P and Q are logarithmic bases; In order to eliminate the influence caused by Ao and minimize the errors deriving from the conversion.