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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">ketendo</journal-id><journal-title-group><journal-title xml:lang="ru">Клиническая и экспериментальная тиреоидология</journal-title><trans-title-group xml:lang="en"><trans-title>Clinical and experimental thyroidology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1995-5472</issn><issn pub-type="epub">2310-3787</issn><publisher><publisher-name>Endocrinology Research Centre</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.14341/ket20106452-57</article-id><article-id custom-type="elpub" pub-id-type="custom">ketendo-4345</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>Статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>Циркадианная и индивидуальная вариабельность уровня ТТГ у лиц, получающих заместительную терапию гипотиреоза</article-title><trans-title-group xml:lang="en"><trans-title>Circadian and individual variability of TSH level in patients received replacement therapy for primary hypothyroidism</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>Sviridonova</surname><given-names>M A</given-names></name></name-alternatives><email xlink:type="simple">-</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ilyin</surname><given-names>A V</given-names></name></name-alternatives><email xlink:type="simple">-</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Fadeyev</surname><given-names>V V</given-names></name></name-alternatives><email xlink:type="simple">-</email></contrib></contrib-group><pub-date pub-type="collection"><year>2010</year></pub-date><pub-date pub-type="epub"><day>15</day><month>12</month><year>2010</year></pub-date><volume>6</volume><issue>4</issue><issue-title>ТОМ 6, №4 (2010)</issue-title><fpage>52</fpage><lpage>57</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Sviridonova M.A., Ilyin A.V., Fadeyev V.V., 2010</copyright-statement><copyright-year>2010</copyright-year><copyright-holder xml:lang="ru">Sviridonova M.A., Ilyin A.V., Fadeyev V.V.</copyright-holder><copyright-holder xml:lang="en">Sviridonova M.A., Ilyin A.V., Fadeyev V.V.</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.cet-endojournals.ru/jour/article/view/4345">https://www.cet-endojournals.ru/jour/article/view/4345</self-uri><abstract><p>В ходе работы предстояло дать оценку клинической значимости циркадианной и индивидуальной вариабельности уровня тиреотропного гормона на фоне заместительной терапии гипотиреоза. В исследование были включены 22 пациента, получающие препараты L-T4 с заместительной целью в возрасте 18–60 лет. Исследование уровня тиреотропного гормона проводилось в 8.00–9.00 и 14.00–16.00 ч одного дня, а также в 8.00–9.00 ч через 4–6 нед. Медиана уровня тиреотропного гормона в утренние часы составила 3,3 мЕд/л, в дневные часы – 2,2 мЕд/л. Диапазон суточных колебаний в процентном отношении достигал 65% (медиана +31,2%). В соответствии с действующим референсным интервалом недостаточная компенсация гипотиреоза (ТТГ &gt; 4 мЕд/л) в утренние часы определялась у 45,5% включенных в исследование лиц, а в дневные – у 9%. В соответствии с предлагаемым целевым интервалом 0,4–2,5 мЕд/л в утренние часы недостаточная компенсация гипотиреоза (ТТГ &gt;2,5 мЕд/л) определялась у 54,5% лиц, а в дневные – у 40%. Уровни тиреотропного гормона через 4–6 нед отличались от исходных на (+95)–95%. В соответствии с референсным диапазоном 0,4–4,0 мЕд/л через 4–6 нед недостаточная компенсация гипотиреоза определялось у 21,4%, а в соответствии с предлагаемым целевым интервалом 0,4–2,5 мЕд/л – у 35,7%. Основное внимание в оценке адекватности заместительной терапии гипотиреоза уделяется определению утреннего уровня тиреотропного гормона. Очевидные сложности поддержания концентраций тиреотропного гормона существуют как в пределах интервала 0,4–4,0 мЕд/л, так и в предлагаемом целевом диапазоне.</p></abstract><trans-abstract xml:lang="en"><p>Objective: to investigate circadian and individual variability of TSH level in patients taking LT4-replacement therapy for primary hypothyroidism. Methods. 22 patients taking LT4-replacement therapy, at the age of 18–60 years have been included. Measurements of serum TSH were performed at 8.00–9.00 h and 14.00–16.00 during the day and at 8.00–9.00 h in 4–6 weeks. Results. The median of TSH concentrations in the morning was 3.3 mU/l, at the day-time – 2.2 mU/l (р &lt;0.05). The amplitude of TSH circadian variability reached 65% (Me-31.2%). According to the current TSH target ranges (0.4–4.0 mU/l) replacement therapy of 45.5% participants in the morning and 9% participants at the daytime has appeared inadequate. According to the proposed TSH target ranges (0.4–2.5 mU/l) 54.5% participants in the morning and 40% participants at the daytime had no hypothyroidism compensation. TSH levels in 4–6 weeks differed from initial on (+95)–95%. In 4–6 weeks replacement therapy has appeared inadequate in 21.4% participants according to the current TSH target ranges and in 35.7% participants according to the proposed TSH target ranges. Conclusion. The leading role in an estimation of adequacy of LT4 replacement therapy is played by morning TSH level. Difficulties of maintenance of TSH concentration exist both within current and proposed target range.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ТТГ</kwd><kwd>св. Т4</kwd><kwd>св. Т3</kwd><kwd>референсный интервал</kwd><kwd>гипотиреоз</kwd><kwd>вариабельность</kwd><kwd>заместительная терапия L-T4</kwd></kwd-group><kwd-group xml:lang="en"><kwd>TSH</kwd><kwd>variability</kwd><kwd>reference interval</kwd><kwd>primary hypothyroidism</kwd><kwd>replacement therapy</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">Мануйлова Ю.А. Медико+социальные аспекты заместительной терапии гипотиреоза: факторы, влияющие на качество компенсации: Авторефер. … канд. мед. наук. М., 2009.</mixed-citation><mixed-citation xml:lang="en">Мануйлова Ю.А. Медико+социальные аспекты заместительной терапии гипотиреоза: факторы, влияющие на качество компенсации: Авторефер. … канд. мед. наук. 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