[Meteorologic effects on hemorrhagic diathesis in hemophilia. 2. Weather effects on hemophilia with special reference to the atmospheric temperature-humidity complex].

The meteotropism of haemophilic haemorrhages was investigated for 1,802 episodes of bleeding in 223 patients with the help of selected parameters of the atmospheric temperature-humidity complex and the air pressure. The accumulation of haemorrhages under the influence of tropic air masses was particularly conspicuous. In low blood pressure the frequency of bleeding also increased, whereas high-pressure conditions showed a decrease of bleeding. The study clearly confirms that the haemorrhagic tendency in haemophilia is influenced by weather. Therefore a medico-meteorologic forecast should be taken into consideration for haemophiliacs.