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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">microcirculation</journal-id><journal-title-group><journal-title xml:lang="ru">Регионарное кровообращение и микроциркуляция</journal-title><trans-title-group xml:lang="en"><trans-title>Regional blood circulation and microcirculation</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-6655</issn><issn pub-type="epub">2712-9756</issn><publisher><publisher-name>Academician I.P. Pavlov First St. Petersburg State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24884/1682-6655-2022-21-4-58-66</article-id><article-id custom-type="elpub" pub-id-type="custom">microcirculation-1129</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 СТАТЬИ (ЭКСПЕРИМЕНТАЛЬНЫЕ ИССЛЕДОВАНИЯ)</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES (EXPERIMENTAL INVESTIGATIONS)</subject></subj-group></article-categories><title-group><article-title>Гендерные особенности реактивности сосудов микроциркуляторного русла кожи крыс по данным лазерной допплеровской флоуметрии</article-title><trans-title-group xml:lang="en"><trans-title>Gender specificity of reactivity rat skins microvessels according to laser doppler flowmetry</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чхаидзе</surname><given-names>И. З.</given-names></name><name name-style="western" xml:lang="en"><surname>Chkhaidze</surname><given-names>I. Z.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чхаидзе Ия Зурабовна – ассистент кафедры акушерства, гинекологии и репродуктологии медицинского факультета</p><p>199034, Санкт-Петербург, Университетская набережная, д. 7/9</p></bio><bio xml:lang="en"><p>Chkhaidze Iya Z. – Assistant of the Department of Obstetrics, Gynecology, and Reproductive Sciences, Medical Faculty</p><p>7/9, Universitetskaya embankment, Saint Petersburg, 199034</p></bio><email xlink:type="simple">chkhaidze_i@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский государственный университет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Saint-Petersburg State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>27</day><month>12</month><year>2022</year></pub-date><volume>21</volume><issue>4</issue><fpage>58</fpage><lpage>66</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Чхаидзе И.З., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Чхаидзе И.З.</copyright-holder><copyright-holder xml:lang="en">Chkhaidze I.Z.</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.microcirc.ru/jour/article/view/1129">https://www.microcirc.ru/jour/article/view/1129</self-uri><abstract><sec><title>   Введение</title><p>   Введение. Известно, что в развитии системных нарушений микроциркуляции определенное значение имеет гендерная принадлежность. Однако особенности реактивности микрососудов и их функциональный резерв недостаточно изучены.</p><p>   Цель – изучение гендерных особенностей реактивности сосудов микроциркуляторного русла кожи крыс по данным лазерной допплеровской флоуметрии (ЛДФ) в условиях проведения функциональных проб.</p></sec><sec><title>   Материалы и методы</title><p>   Материалы и методы. Исследование проводили на самцах и самках крыс стока Wistar. В эксперимент отбирали самок с устойчивым 4-дневным эстральным циклом по данным кольпоцитограммы. Методом ЛДФ оценивали исходную перфузию кожи и ее динамику в условиях проведения пробы с локальной контактной гипотермией, вызванной термоэлементом. Распределение температурных полей оценивали с помощью тепловизора FLIR ONE Pro.</p></sec><sec><title>   Результаты</title><p>   Результаты. При контактном охлаждении кожи развивалась реакция сосудов микроциркуляторного русла, имеющая фазный характер. Сразу после воздействия локальная контактная гипотермия сопровождалась значимым снижением температуры кожи и тканевой перфузии (в зоне лазерной флоуметрии). При этом процент редукции кожного кровотока (Q %) у самцов был выше, чем у самок, и составил 54 % от исходных значений. Максимальная перфузия после восстановления кровотока отмечена на 5-й минуте у самцов, на 3-й минуте у самок и составила 147 % и 149,9 % соответственно. Исходный кровоток в микрососудах кожи в разных фазах эстрального цикла у самок статистически значимо не отличался. Однако при проведении функциональной пробы в стадии проэструса, характеризующейся максимальной секрецией эстрогенов яичниками, вазоконстрикция была менее выражена, чем в других фазах цикла.</p></sec><sec><title>   Заключение</title><p>   Заключение. Выявленные особенности редукции кровотока с последующей «холодовой вазодилатацией» в условиях проведения проб с локальной контактной гипотермией свидетельствуют о бóльшем функциональном резерве микрососудов и более эффективном механизме ауторегуляции системы микроциркуляции крови у самок крыс.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>   Introduction</title><p>   Introduction. In the development of systemic microcirculation disorders, gender is known to have a certain significance. However, the features of the microvessels reactivity and their functional reserve have not been sufficiently studied.</p><p>   Purpose – to study the gender specificity of the microvessels reactivity of rat skin according to LDF data in the conditions of functional tests.</p></sec><sec><title>   Materials and methods</title><p>   Materials and methods. The study was carried out on male and female Wistar rats. Females with a stable 4-day estrous cycle according to colpocytogram data were selected for the experiment. The LDF method was used to evaluate the initial skin perfusion and its dynamics under the conditions of a test with local contact hypothermia induced by a thermoelement. The distribution of temperature fields was evaluated using a FLIR ONE Pro thermal imaging camera.</p></sec><sec><title>   Results</title><p>   Results. While contact cooling of the skin, microvessels developed a reaction having phase pattern. Immediately after exposure, local contact hypothermia was accompanied by a significant decrease in skin temperature and tissue perfusion (in the area of laser flowmetry). At the same time, males had higher percentage of reduction in skin blood flow (Q %) than females and amounted to 54 % of the initial values. The maximum perfusion after the restoration of blood flow was noted at the 5th minute in males, at the 3rd minute in females and amounted to 147 % and 149.9 %, respectively. The initial blood flow in the skin microvessels in different phases of the estrous cycle in females did not differ significantly. However, when conducting a functional test in the proestrus stage, characterized by the maximum secretion of estrogens by the ovaries, vasoconstriction was less pronounced than in other phases of the cycle.</p></sec><sec><title>   Conclusion</title><p>   Conclusion. The revealed features of blood flow reduction followed by «cold vasodilation» under conditions of local contact hypothermia tests indicate a greater functional reserve of microvessels and a more effective mechanism of autoregulation of the microcirculation system in female rats.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>локальное охлаждение</kwd><kwd>кожный кровоток</kwd><kwd>микроциркуляция</kwd><kwd>микрососуды</kwd><kwd>реактивность</kwd><kwd>крыса</kwd><kwd>эстральный цикл</kwd><kwd>лазерная допплеровская флоуметрия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>local cooling</kwd><kwd>skin blood flow</kwd><kwd>microcirculation</kwd><kwd>microvessels</kwd><kwd>reactivity</kwd><kwd>rat</kwd><kwd>estrous cycle</kwd><kwd>laser Doppler flowmetry</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">Miller V. 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