RESUMO
The introduction of special centrifugable racks with a transparent bottom into the conventional typing of blood groups in glass tubes facilitates the simultaneous work on and reading of a maximum of 32 complete ABO, Rhesus and Kell typings in one series. As a result of the facts that it is unnecessary to label the individual tubes and that the pipetting of serum and erythrocyte suspensions is done automatically and through the unmistakable classification of the samples by means of bar-coding, the manual work is reduced to about 50%. This modified typing method combines the advantages of the conventional typing method in glass tubes with the advantages of an efficient microplate technique. There is no qualitative loss in the implementation and reading of the analysis.