Disse inhibitorer er uden undtagelse IgG immunoglobuliner rettet mod faktor VIII’ s prokoagulante aktivitet som kvantificeres i Modificerede Bethesda Enheder (BE) pr. ml plasma.
These inhibitors are invariably IgG immunoglobulins directed against the factor VIII procoagulant activity, which are quantified in Modified Bethesda Units (BU) per ml of plasma.