[On the issue of determining notions "medical malpractice", "yatrogeny" and "defect of medical care": social legal aspects].

The article considers social legal aspects of concepts of "medical error", "iatrogenesis", "defect of medical care" in view of absence of their clear definition and understanding in public and professional communities. The usage of these concepts is distinguished by chronological continuity that is conditioned by influence of approaches existed at different stages. On the basis of analysis of scientific publications and normative legal base their genesis and peculiarities of definition are demonstrated.