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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">zabmedvestnik</journal-id><journal-title-group><journal-title xml:lang="ru">Забайкальский медицинский вестник</journal-title><trans-title-group xml:lang="en"><trans-title>Transbaikalian Medical Bulletin</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">1998-6173</issn><publisher><publisher-name>Читинская государственная медицинская академия</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52485/19986173_2025_2_60</article-id><article-id custom-type="elpub" pub-id-type="custom">zabmedvestnik-406</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>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL RESEARCH</subject></subj-group></article-categories><title-group><article-title>Содержание D-димера и тромобоцитов как предикторов неблагоприятного исхода при критическом течении COVID-19: одноцентровое проспективное исследование</article-title><trans-title-group xml:lang="en"><trans-title>The content of D-dimer and platelets as predictors of an unfavorable outcome in the critical course of COVID-19: a single-center</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3333-2058</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шапошников</surname><given-names>Б. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Shaposhnikov</surname><given-names>B. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Борис Сергеевич Шапошников, ассистент, заведующийотделением</p><p>отделение интенсивной терапии, анестезиологии и реанимации</p><p>кафедра детских инфекционных болезней</p><p>355017; ул. Мира, 310; Ставрополь; 356146; ул. Колхозная, 2; Ставропольский край; Изобильный</p></bio><bio xml:lang="en"><p>Assistant, Head of the Unit</p><p>Department of Pediatric Infectious Diseases; Intensive Care Unit, Anesthesiology and Reanimatology</p><p>355017; 310 Mira St.; Stavropol; 356146; 2 Kolkhoznaya St.; Stavropol Territory; Izobilny </p></bio><email xlink:type="simple">mackisaew@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9990-7272</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Обедин</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Obedin</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Николаевич Обедин, д. м. н., заведующий кафедрой</p><p>кафедра анестезиологии и реаниматологии с курсом ДПО</p><p>355017; ул. Мира, 310; Ставрополь</p></bio><bio xml:lang="en"><p>Doctor of Medical Sciences, Head of the Department</p><p>Department of Anesthesiology and Intensive Care with a course in Advanced Medical Education</p><p>355017; 310 Mira St.; Stavropol</p></bio><email xlink:type="simple">volander@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0225-3672</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Голубева</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Golubeva</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Марина Викторовна Голубева, д. м. н., профессор, заведующая кафедрой</p><p>кафедра детских инфекционных болезней</p><p>355017; ул. Мира, 310; Ставрополь</p></bio><bio xml:lang="en"><p>Doctor of Medical Sciences, Professor, Head of the Department</p><p>Department of Pediatric Infectious Diseases</p><p>355017; 310 Mira St.; Stavropol</p></bio><email xlink:type="simple">mmvg@rambler.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4705-3823</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Быков</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bykov</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юрий Витальевич Быков, к. м. н., доцент, врач-анестезиолог-реаниматолог</p><p>кафедра анестезиологии и реаниматологии с курсом ДПО</p><p>355017; ул. Мира, 310; 355029;  ул. Семашко 3; Ставрополь</p></bio><bio xml:lang="en"><p>Candidate of Medical Sciences, Associate Professor, anesthesiologist-reanimatologist</p><p>Department of Anesthesiology and Intensive Care with a course in Advanced Medical Education</p><p>355017; 310 Mira St.; 355002; 3 Semashko St.; Stavropol</p></bio><email xlink:type="simple">yubykov@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-4050-1283</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ишкова</surname><given-names>Н. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Ishkova</surname><given-names>N. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Наталия Михайловна Ишкова, к. м. н., ассистент</p><p>кафедра биохимии, лабораторной диагностики и бактериологии с курсом ДПО</p><p>355017; ул. Мира, 310; Ставрополь</p></bio><bio xml:lang="en"><p>Candidate of Medical Sciences, Assistant</p><p>Department of Biochemistry, Laboratory Diagnostics and Bacteriology with a course in Advanced Medical Education</p><p>355017; 310 Mira St.; Stavropol</p></bio><email xlink:type="simple">is-hkova@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3509-3481</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мусаелян</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Musaelyan</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ольга Араратовна Мусаелян, к. м. н., доцент</p><p>кафедры детских инфекционных болезней</p><p>355017; ул. Мира, 310; Ставрополь</p></bio><bio xml:lang="en"><p>Candidate of Medical Sciences, Associate Professor</p><p>Department of Pediatric Infectious Diseases</p><p>355017; 310 Mira St.; Stavropol</p></bio><email xlink:type="simple">olga.stv@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Ставропольский государственный медицинский университет» Министерства здравоохранения РФ; ГБУЗ Ставропольского края «Изобильненская районная больница» Министерства здравоохранения РФ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Stavropol State Medical University; Izobilnenskaya District Hospital</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБОУ ВО «Ставропольский государственный медицинский университет» Министерства здравоохранения РФ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Stavropol State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>ФГБОУ ВО «Ставропольский государственный медицинский университет» Министерства здравоохранения РФ; ГБУЗ Ставропольского края «Детская краевая клиническая больница» Министерства здравоохранения РФ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Stavropol State Medical University; Stavropol Regional Children's Clinical Hospital</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>04</day><month>07</month><year>2025</year></pub-date><volume>0</volume><issue>2</issue><fpage>60</fpage><lpage>71</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шапошников Б.С., Обедин А.Н., Голубева М.В., Быков Ю.В., Ишкова Н.М., Мусаелян О.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Шапошников Б.С., Обедин А.Н., Голубева М.В., Быков Ю.В., Ишкова Н.М., Мусаелян О.А.</copyright-holder><copyright-holder xml:lang="en">Shaposhnikov B.S., Obedin A.N., Golubeva M.V., Bykov Y.V., Ishkova N.M., Musaelyan O.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://www.zabmedvestnik.ru/jour/article/view/406">https://www.zabmedvestnik.ru/jour/article/view/406</self-uri><abstract><p>   Целью исследования являлась комплексная оценка уровней D-димера и тромбоцитов (ТРБ) у пациентов с тяжёлым и критическим течением COVID-19, с последующим анализом их корреляции с выраженностью воспалительной реакции и тяжестью заболевания, а также определением суток пребывания в отделении реанимации и интенсивной терапии (ОРИТ), ассоциированных с наибольшим риском неблагоприятного исхода.</p><sec><title>   Материалы и методы</title><p>   Материалы и методы. Обследованы 70 человек: группа исследования – 50 пациентов с COVID-19 (возраст 45,5 [32–48] лет) и группа контроля – 20 здоровых добровольцев (возраст 42,5 [34–47,5] лет). Группа исследования была разделена на две подгруппы: тяжелое течение (I подгруппа, выжившие, n = 30) и критическое течение (II подгруппа, умершие, n = 20). В венозной крови у пациентов с COVID-19 определяли содержание D-димера, ТРБ, лейкоцитов (ЛЕЙК) и С-реактивного белка (СРБ) на 3, 5, 7, 10 и 16 сутки заболевания; в контрольной группе исследование проводилось однократно. Оценивались респираторный индекс (РИ) и его корреляция с показателями D-димера и ТРБ. Дополнительно анализировалась корреляция между показателями ЛЕЙК/СРБ и D-димера/ТРБ. Для статистического анализа использовали t-критерий Стьюдента, тест ANOVA, корреляцию по Спирмену и ROC-анализ.</p></sec><sec><title>   Результаты</title><p>   Результаты. Обнаружено повышение уровня D-димера с максимальными значениями в подгруппе умерших пациентов на 10-е сутки заболевания (2,36 ± 0,11 нг/мл; p &lt; 0,001). В этой же контрольной точке у пациентов II подгруппы отмечено минимальное количество ТРБ (107,05 ± 5,07 × 10⁹/л; p &lt; 0,001). Установлена значимая корреляция между высокими уровнями D-димера и тромбоцитопенией по сравнению с корреляцией между повышением ЛЕЙК и СРБ. Также выявлена связь между изменениями D-димера/ТРБ и респираторным индексом на 7-е и 10-е сутки заболевания в группе умерших пациентов. По результатам ROC-анализа определены оптимальные прогностические точки отсечения для летального исхода: для D-димера – &gt;1,41 нг/мл, для ТРБ – &lt;126,0 × 10⁹/л на 7-е сутки заболевания.</p></sec><sec><title>   Заключение</title><p>   Заключение. Высокие уровни D-димера и тромбоцитопения на фоне системной воспалительной реакции указывают на наличие тромбовоспаления и коагулопатии у пациентов с критическим течением COVID-19, что является прогностически неблагоприятным фактором. Повышение уровня D-димера &gt; 1,41 нг/мл и снижение числа тромбоцитов &lt;126,0 × 10⁹/л на 7-е сутки нахождения в ОРИТ могут служить предикторами летального исхода при критическом течении COVID-19.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>   Research Objective</title><p>   Research Objective. The aim of this study is to comprehensively assess D-dimer and platelet (PLT) levels in patients with severe and critical COVID-19, analyze their correlation with the intensity of the inflammatory response and disease severity, and identify the days of stay in the intensive care unit (ICU) associated with the highest risk of unfavorable outcomes.</p></sec><sec><title>   Materials and Methods</title><p>   Materials and Methods. A total of 70 individuals were examined: the study group included 50 COVID-19 patients (age 45,5 [32–48] years), and the control group consisted of 20 healthy volunteers (age 42,5 [34–47.5] years). The study group was further divided into two subgroups: severe course (Subgroup I, survivors, n = 30) and critical course (Subgroup II, deceased, n = 20). Venous blood levels of D-dimer, PLT, leukocytes (WBC), and C-reactive protein (CRP) were measured in COVID-19 patients on days 3, 5, 7, 10, and 16 of the disease, while the control group was assessed once. The respiratory index (RI) and its correlation with D-dimer and PLT levels were evaluated in the study group. Additionally, correlations between WBC/CRP and D-dimer/PLT levels were analyzed. Statistical analysis was performed using Student’s t-test, ANOVA, Spearman’s correlation, and ROC analysis.</p></sec><sec><title>   Results</title><p>   Results. Elevated D-dimer levels were observed, with peak values in the deceased subgroup on day 10 (2,36 ± 0,11 ng/mL; p &lt; 0,001). At the same time point, Subgroup II exhibited the lowest PLT counts (107,05 ± 5.07 × 10⁹/L; p &lt; 0,001). A significant correlation was found between high D-dimer levels and thrombocytopenia compared to elevated WBC and CRP levels, as well as between D-dimer/PLT and RI on days 7 and 10 in the deceased subgroup. ROC analysis identified optimal prognostic cut-off values for mortality: D-dimer &gt;1,41 ng/mL and PLT &lt;126,0 × 10⁹/L on day 7 of the disease.</p></sec><sec><title>   Conclusion</title><p>   Conclusion. High D-dimer levels and thrombocytopenia in the setting of systemic inflammation indicate thromboinflammation and coagulopathy in critically ill COVID-19 patients, serving as unfavorable prognostic markers. A D-dimer level &gt;1,41 ng/mL and PLT count &lt;126,0 × 10⁹/L by day 7 of ICU admission may predict fatal outcomes in critical COVID-19 cases.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>COVID-19</kwd><kwd>критическое течение</kwd><kwd>D-димер</kwd><kwd>тромбоцитопения</kwd><kwd>лейкоциты</kwd><kwd>С-реактивный белок</kwd><kwd>прогнозирование летального исхода</kwd></kwd-group><kwd-group xml:lang="en"><kwd>COVID-19</kwd><kwd>critical course</kwd><kwd>D-dimer</kwd><kwd>thrombocytopenia</kwd><kwd>leukocytes</kwd><kwd>C-reactive protein</kwd><kwd>mortality prediction</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование не имело спонсорской поддержки</funding-statement><funding-statement xml:lang="en">The study had no sponsorship</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Barrett T.J., Bilaloglu S., Cornwell M. et al. 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