[Radioimmunoassay of fibrinopeptide A: double antibody method]

A radioimmunoassay kit was used for measurement of human fibrinopeptide A in plasma. The "charcoal technique" was replaced by the more precise double-antibody method. The possibility of automation allows a shortening of the time for performing the assay and a more general clinical use. Normal values and preliminary results of patients with septic disorders and of a hemophilic patient with antibodies to factor VIII which is substituted by pro-coagulation factors (FEIBA) are reported.