[The scientific revolution in medicine of last quarter of XIX - first half of XX centuries: New approaches to diagnostic and treatment of diseases].

The article considers changes in mass physician consciousness approaches to diagnostic and treatment of diseases occurred in the end of XIX-first half of XX centuries. It was the result of gaining a foothold in medicine of new view on organism as a procedural system and concepts of diseases as a complex feedback reaction of this system to unfavorable effect of environmental factors. It is demonstrated that the major change in diagnostic became refusal of traditional for XIX century orientation of diagnostic search exclusively on “clinical prediction of pathological picture" in favor of complex evaluation of state of ill person. The scale transformations in medical business affecting clinic of internal diseases and surgery disciplines resulted in that for the first time symptomatic therapy was replaced by comparatively effective ethiotropic and pathogenic treatment.