[State of hemostasis in hemorrhagic vasculitis in children].

The purpose of the study was to explore hemostasis in children suffering from hemorrhagic vasculitis (HV) by means of the new amidolytic methods using chromogenic substrates. The patient's plasma was studied for the content of thrombin, trypsin, factor Xa, AT-III, kallikrein, plasmin, free heparin, urokinase, factor 3 of platelets, prothrombin and Willebrand's factor. 69 children with HV were entered into the study.

[Blood aggregation in duodenal ulcer].

Thirty-six children with duodenal ulcer were examined for the coagulation and thrombocytic components of hemostasis. Use was made of the new coagulologic research methods based on administration of the synthetic tri- and tetrapeptides containing a chromoform group. The high sensitivity of the synthetic peptides enables the use of plasma in high dilutions, owing to which the effect of inhibitors is decreased and a small amount of blood is only required, being of paramount importance in carrying out serial tests.