The purpose of the present work was to develop a new classi cation so as to concretize, to systematize and to clarify the understanding of the discussed nozologic form essence; to de ne various diseases which could lead to the discussed pathology with speci c clinical manifestations. <...> The developed classi cation is to have a prognostic importance and to give proper objective characteristics of the discussed pathology in general. <...> The developed classi cation has included all positive moments which were seen in previous classi cations. <...> This classi cation has been developed on analyzing etiologic and pathogenetic signs of different diseases which lead to unhealing and chronic wounds (ulcers). <...> Vowden K. A randomizes study comparing compliance, healing and complications from three alternative four-layer bandage regimens in the treatment of venous leg ulcers // Taking wound care info 21ht century: Proc. of the 9 th Eur Cont on Advances in Wound Management. 9–11, Nov. 1999. <...> Цель классификации - конкретизировать, систематизировать, упорядочить представление о сущности нозологиче-ской формы с выделением различных заболеваний, на фоне которых сформировались хронические раны (язвы), с их клиническими проявлениями, прогностической значимостью и соответствующими объективными характеристиками заболеваний в целом. <...>