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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">medbio</journal-id><journal-title-group><journal-title xml:lang="ru">Медико-биологические проблемы жизнедеятельности</journal-title><trans-title-group xml:lang="en"><trans-title>Medical and Biological Problems of Life Activity</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2074-2088</issn><publisher><publisher-name>Республиканский научно-практический центр радиационной медицины и экологии человека</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.58708/2074-2088.2025-2(34)-35-42</article-id><article-id custom-type="elpub" pub-id-type="custom">medbio-443</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КЛИНИЧЕСКАЯ МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL MEDICINE</subject></subj-group></article-categories><title-group><article-title>Формула расчёта индекса окислительного стресса у пациентов с циррозом печени и острой кровопотерей</article-title><trans-title-group xml:lang="en"><trans-title>Formula for calculating oxidative stress index in patients with liver cirrhosis and acute blood loss</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6835-779X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Евсеенко</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Evseenko</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитрий Александрович Евсеенко</p><p>г. Гомель</p></bio><email xlink:type="simple">ayvengoo@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чуешова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Chueshova</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Гомель</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Веялкина</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Vejalkina</surname><given-names>N. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Гомель</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дундаров</surname><given-names>З. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Dundarov</surname><given-names>Z. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Гомель</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>УО «Гомельский государственный медицинский университет»</institution><country>Belarus</country></aff><aff xml:lang="ru" id="aff-2"><institution>ГНУ «Институт радиобиологии НАН Беларуси»</institution><country>Belarus</country></aff><aff xml:lang="ru" id="aff-3"><institution>ГУ «РНПЦ радиационной медицины и экологии человека»</institution><country>Belarus</country></aff><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>18</day><month>07</month><year>2025</year></pub-date><volume>0</volume><issue>2</issue><fpage>35</fpage><lpage>42</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Евсеенко Д.А., Чуешова Н.В., Веялкина Н.Н., Дундаров З.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Евсеенко Д.А., Чуешова Н.В., Веялкина Н.Н., Дундаров З.А.</copyright-holder><copyright-holder xml:lang="en">Evseenko D.A., Chueshova N.V., Vejalkina N.N., Dundarov Z.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://medbio.ejournal.by/jour/article/view/443">https://medbio.ejournal.by/jour/article/view/443</self-uri><abstract><p>Должное и объективное внимание химии свободных радикалов по-прежнему остаётся высоким среди исследователей медицинской науки. Принято считать, что свободными радикалами являются активные формы неметаллов: халькогенов, пниктогенов, галогенов. Они, вступая в сложные и многостадийные реакции с биологическими мембранами клеток, нарушают функциональную активность последних и формируют общее патологическое состояние, именуемое окислительным стрессом. Сегодня важно установление наличия и концентрации как промежуточных, так и конечных метаболитов реакций окисления с целью определения степени тяжести (стадийности и глубины проявлений) окислительного стресса. Перспективным и обоснованным с научной точки зрения можно считать изучение концентраций ряда продуктов патобиохимических реакций при окислительном стрессе. К таковым принято относить общую антиоксидантную ёмкость, глутатион восстановленный, общие меркаптогруппы, продукты окисления белков, нитрат- и нитрит-ионы, малоновый диальдегид, супероксиддисмутазу, каталазу и глутатионредуктазу. Единение указанных параметров в общий патогенез окислительного стресса является перспективным исследованием с целью выведения математической формулы расчёта индекса окислительного стресса у пациентов с циррозом печени и острой кровопотерей.</p></abstract><trans-abstract xml:lang="en"><p>The chemistry of free radicals has not yet received the attention it deserves in medical research. It is generally accepted that free radicals are active forms of non-metals: chalcogenes, pnictogens, halogens. They enter into complex and multistage reactions with the biological membranes of cells, disrupting their functional activity and creating a general pathological state called oxidative stress. Today it is important to determine the presence and concentration of both intermediate metabolites of reactions and final metabolites of oxidation reactions in order to determine the severity (stages and depth of manifestations) of oxidative stress. The study of the concentrations of a number of products of pathobiochemical reactions in oxidative stress can be considered promising and scientifically justified. These parameters include total antioxidant capacity, reduced glutathione, total mercaptogroups, protein oxidation products, nitrate and nitrite ions, malonic dialdehyde, superoxide dismutase, catalase and glutathione reductase. The unification of the above parameters in the general pathogenesis of oxidative stress is a promising study to derive a mathematical formula for calculating the oxidative stress index in patients with cirrhosis and acute blood loss.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>окислительный стресс</kwd><kwd>антиоксидантная система крови</kwd><kwd>лабораторная диагностика</kwd><kwd>цирроз печени</kwd><kwd>острая кровопотеря</kwd></kwd-group><kwd-group xml:lang="en"><kwd>oxidative stress index</kwd><kwd>antioxidant system of blood</kwd><kwd>laboratory diagnostics</kwd><kwd>liver cirrhosis</kwd><kwd>acute blood loss</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Oxidative Stress: The Role of Antioxidant Phytochemicals in the Prevention and Treatment of Diseases / A. Muscolo, O. Mariateresa, T. 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