Introduction. Surgery at the first stage has always been the gold-standard treatment for locally advanced head cancer of almost all locations. Such patients often have significant postoperative defects that cause serious functional and aesthetic disorders. This requires simultaneous defect repair. The technique of defect repair should be chosen carefully with the consideration of its benefits and potential consequences.Objective – to evaluate the efficacy of revascularized radial flaps for defect repair after combination extensive surgical excisions of head and neck tumors.Materials and methods. This study included 67 patients with head and neck cancers of different locations who had undergone surgical tumor excision followed by defect repair using a radial flap.Results. All patients had their defects repaired using radial autologous grafts. Since this study included primarily patients with oral and oropharyngeal tumors (53 patients), we also analyzed the survival in this cohort. patients were followed-up for 2 to 7 years. fourteen patients (26.4 %) developed progressive disease during this time, including 8 individuals with recurrent primary tumor and 6 individuals with regional metastases. The mean time to nasoesophageal probe removal and restored swallowing was 12.2 days; mean length of hospital stay was 13.5 days.Conclusion. Thus, radial flap is a reliable and multifunctional material that can be used to repair complex and combination defects in patients with head and neck tumors. In some cases, it is the method of choice, since it helps to achieve satisfactory quality of life. Repair of tongue defects with radial flaps ensures good functional results.

During the COVID-19 pandemic in the Russian Federation associated with restrictions and quarantine, in order to ensure the quality and availability of tuberculosis medical care to the population of the Republic of Sakha, it became necessary to improve and search for new organizational forms of out-patient care.The objective of the study: to analyze the use of new technologies in out-patient care for tuberculosis patients in the Republic of Sakha (Yakutia) during the COVID-19 pandemic.Result: Scientific Practical Phthisiology Center introduced the following information and digital technologies to ensure the availability and quality of medical services to the population of the republic during the COVID-19 pandemic: Cloud Polyclinic, Telemedical Consultations, Radiological Information System of APK ArchiMed , Video-Controlled Treatment at Home, and Hospital at Home.All technologies have demonstrated their efficacy for remote medical consultations and contacting patients online. Based on practical experience, these technologies provided the following: improvement of medical care provided to the population through consultations, maintaining good contact with the patient, monitoring patients' well-being, and drug in-take. They assured compliance with general federal and regional anti-epidemic recommendations to prevent the spread of the new coronavirus infection.

The corrosive effect of the slag-forming mixture (SFM) of the crystallizer on monoclinic zirconium dioxide, partially stabilized by calcium oxide or yttrium oxide is studied. It was experimentally stated that zirconium dioxide stabilized with yttrium oxide has better corrosion resistance due to the low decomposition rate of the stable phase ZrO2‒Y2O3 when exposed to SFM of the same composition. Ill. 4. Ref. 10. Tab. 4.

The production of taphole clays in the conditions of JSC «DINUR» has passed a long and problematic way during 25 years, many significant milestones have been overcome. The continuous improvement of formulas and production technology allowed the company to become the main Russian manufacturer of this type of products and to move from the concept of a unified composition to an individual approach, depending on the specific operation conditions of a particular blast furnace. Ill. 4. Tab. 1.

No abstract