NOVELTY OF RESEARCH. For the first time, based on the design and creation of an approximation-immobilization device (RU Patent № 112020, Bull. № 1, 01.10.2012) will be improved the surgical treatment of patients with this pathology, clinical and anatomical study of the proposed device for different configurations of gluteal-sacrococcygeal region, as well as the analysis and justification of the basic parameters of wound (length, depth and width of the wound, the number of stitches, the complication rate , the area of the wound).