[The effects of the weather on hemophilic hemarthrosis (author's transl)].

Hemophilic hemarthroses occur more frequently in spring and autumn. In the present study, possible weather situations are investigated which are characterized by a particular action on the increasing of hemorrhagic tendency. In 574 hemarthroses in 45 patients, the regional weather events were set in relation to the hemarthroses by means of a computer program. The following weather constellations significantly increase the tendency to bleed: Regional west weather conditions combined with longer lasting ascending procedures. The weather dynamics are dominated by the warm face of weak frontal zones with formation of a warm front. The biotropic weather elements demonstrated are also shown to be biotropic in other disease processes.