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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">ppharm</journal-id><journal-title-group><journal-title xml:lang="ru">Педиатрическая фармакология</journal-title><trans-title-group xml:lang="en"><trans-title>Pediatric pharmacology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1727-5776</issn><issn pub-type="epub">2500-3089</issn><publisher><publisher-name>Издательство «ПедиатрЪ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15690/pf.v20i1.2526</article-id><article-id custom-type="elpub" pub-id-type="custom">ppharm-2267</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>КРАТКИЕ СООБЩЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SHORT REPORT</subject></subj-group></article-categories><title-group><article-title>Течение гомозиготной метгемоглобинемии у девочки двух лет</article-title><trans-title-group xml:lang="en"><trans-title>Homozygous Methemoglobinemia Course in a 2-Year-Old Girl</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2289-5306</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малюгина</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Malyugina</surname><given-names>Marina S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Малюгина Марина Сергеевна, студентка,</p><p>117997, Москва, ул. Островитянова, д. 1, стр. 7</p></bio><bio xml:lang="en"><p>1, b. 7, Ostrovityanova Str., Moscow, 117997</p></bio><email xlink:type="simple">malyugms00@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9993-3171</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лаврова</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Lavrova</surname><given-names>Daria A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лаврова Дарья Александровна,</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">darialoveyou@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/0000-0003-1119-8043</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Матвеева</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Matveeva</surname><given-names>Ekaterina A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Матвеева Екатерина Антоновна,</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">katamatveeva1998@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>РНИМУ им. Н.И. Пирогова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pirogov Russian National Research Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>28</day><month>02</month><year>2023</year></pub-date><volume>20</volume><issue>1</issue><fpage>56</fpage><lpage>58</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Малюгина М.С., Лаврова Д.А., Матвеева Е.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Малюгина М.С., Лаврова Д.А., Матвеева Е.А.</copyright-holder><copyright-holder xml:lang="en">Malyugina M.S., Lavrova D.A., Matveeva E.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.pedpharma.ru/jour/article/view/2267">https://www.pedpharma.ru/jour/article/view/2267</self-uri><abstract><sec><title>Обоснование</title><p>Обоснование. Метгемоглобинемии — группа заболеваний, обусловленных различными факторами, при которых увеличивается содержание метгемоглобина (MetHb) в крови свыше физиологической нормы.</p><p>Описание клинического случая. Представлен клинический случай девочки двух лет, у которой метгемоглобинемия оказалась случайной находкой при обращении по поводу травмы головы. В результате исследований установлен нулевой уровень активности фермента цитохром-b5-редуктазы, что свидетельствует о гомозиготном состоянии гена. Состояние цианоза и гипоксии купировано приемом аскорбиновой кислоты курсами 250 мг/сут.</p></sec><sec><title>Заключение</title><p>Заключение. Следует проявлять повышенную настороженность в отношении длительного изолированного цианоза при исключении наиболее распространенных причин его развития. При своевременно начатом лечении можно предотвратить развитие тяжелых осложнений. </p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Background</title><p>Background. Methemoglobinemia is a group of diseases caused by various factors where methemoglobin (MetHb) content in the blood increases above the physiological norm.</p><p>Clinical case description. Clinical case of methemoglobinemia that was an incidental finding in two-year-old girl who was in the clinic due to the head injury is presented. Our examinations have revealed zero activity of cytochrome-b5-reductase enzyme. This fact indicates homozygous mutation. The cyanosis and hypoxia were relieved by ascorbic acid courses (250 mg/day).</p></sec><sec><title>Conclusion</title><p>Conclusion. Increased alertness regarding long-term isolated cyanosis should be presented when excluding its most common causes. Timely management could prevent severe complications development. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>метгемоглобинемия</kwd><kwd>гомозиготная метгемоглобинемия</kwd><kwd>никотинамидадениндинуклеотидгидрогеназа-цитохром-b5-редуктаза</kwd><kwd>клинический случай</kwd><kwd>дети</kwd><kwd>метгемоглобин</kwd><kwd>цианоз</kwd><kwd>аскорбиновая кислота</kwd></kwd-group><kwd-group xml:lang="en"><kwd>methemoglobinemia</kwd><kwd>homozygous methemoglobinemia</kwd><kwd>nicotinamide adenine dinucleotide hydrogenase-cytochromeb5-reductase</kwd><kwd>clinical case</kwd><kwd>children</kwd><kwd>methemoglobin</kwd><kwd>cyanosis</kwd><kwd>ascorbic acid</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">Казанец Е.Г. Метгемоглобинемии // Детская больница. — 2009. — № 1. — С. 38–42.</mixed-citation><mixed-citation xml:lang="en">Kazanets EG. Metgemoglobinemii. 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