[On the use of concentrated haptoglobin in the treatment of a haemolytic transfusion accident of the ABO-system (author's transl)].

: The clinical course and the treatment of a case of severe haemolytic ABO-incompatibility are described. In addition to the routine therapy 3 times 2000 units of haptoglobinconcentrate were given since it is known according to the literature to metabolize free haemoglobin. The clinical result seems to confirm the beneficial effect. The course remained free of complications and the hospital stay was not prolonged. Further clinical experience is needed to confirm the effectiveness of the treatment with haptoglobin in cases with severe haemolysis.