## 4 Conclusions  
The problem of preventing and treating wounds and wound infections is acute in modern medicine and largely associated with the emergence of pathogens with multidrug resistance. In this work, we proposed a new approach to treating complicated wound lesions. It involves treating the wound surface with high-intensity, broad-spectrum pulsed optical radiation and continuously covering the entire UV range (from 200 to 400 nm) and the visible and near-infrared spectral regions. Impulse xenon lamps were used as a radiation source. Such lamps emit a continuous spectrum in a wavelength range of 200 to 2700 nm and make it possible to irradiate objects with extremely high intensity, several orders of magnitude higher than the irradiation intensity of traditional therapeutic radiation sources. Broad-spectrum, high-intensity, pulsed optical radiation is a new and, to date, little-studied physical tool for influencing biological objects, including biomolecules, cells, biological tissues, and the body as a whole. The high-intensity pulsed optical irradiation \"Zarnitsa-A\" apparatus was studied in this work, and it uses the proposed new medical technology to treat wounds and infectious diseases. Given the results of the microbiological tests of the \"Zarnitsa-A\" apparatus, its high bactericidal effectiveness and the possibility of significantly reducing the duration of preventive and therapeutic procedures were shown--after 5-10 s of irradiating heavily polluted microflora surfaces, the disinfection efficiency against clinically significant pathogens was more than 99.999%. In vivo experiments on laboratory animals showed the higher bactericidal efficacy of the \"Zarnitsa-A\" apparatus compared with the anti-infective and therapeutic ointment levomekol. In a preclinical study of the wound-healing effect of the \"Zarnitsa-A\" apparatus, we showed that the selected irradiation regimen--namely, a daily dose of UV-C radiation at 0.3 J/cm\({}^{2}\); a fluence integrated over a spectrum of 3 J/cm\({}^{2}\) with a cumulative dose of short-wave UV radiation for a course of therapy at 2.4 J/cm\({}^{2}\); and a cumulative fluence of 24 J/cm\({}^{2}\)--did not cause death or pronounced functional and somatic disorders in Wistar rats. Analyses of physiological and hematological parameters did not reveal pathological changes that could be associated with the action of the device under study. At the same time, we found that the \"Zarnitsa-A\" high-intensity pulsed optical irradiation apparatus has a pronounced wound-healing effect and, in combination with levomekol ointment, reliably provides a higher rate of wound healing compared with official levomekol ointment alone. The implemented technical characteristics and declared modes of wound irradiation can be recommended as the main ones in treating infected wounds and should be clarified in the course of clinical trials. Our experimental data indicate the potential prospects of using the \"Zarnitsa-A\" apparatus for pulsed, high-intensity optical irradiation in medical and veterinary practice to treat and prevent wound lesions. Conceptualization, V.V.B., I.V.B. and A.S.K. ; methodology, L.Y.V. and E.V.Z. ; validation, E.V.Z. and A.V.K. ; formal analysis, V.I.K. ; investigation, L.Y.V., A.V.K. and S.M.N. ; resources, A.S.K. and S.M.N. ; data curation, D.O.N., L.Y.V., A.V.K. and S.M.N. ; writing--original draft preparation, A.S.K., I.V.B., L.Y.V. and S.M.N. ; writing--review and editing, V.V.B., A.S.K. and E.V.Z. ; visualization, S.M.N. ; supervision, K.A.S., A.S.K. and A.V.K. ; project administration, V.V.B. and V.I.K. All authors have read and agreed to the published version of the manuscript. This research received no external funding. This study was conducted according to the requirements of Directive 2010/63 /EU of the European Parliament and of the Council of the European Union of 09/22/2010, on the protection of animals used for scientific purposes and the European Convention for the Protection of Vertebrate Animals used for Experimental and Other Scientific Purposes (ETS No.