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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Kazan medical journal</journal-id><journal-title-group><journal-title xml:lang="en">Kazan medical journal</journal-title><trans-title-group xml:lang="ru"><trans-title>Казанский медицинский журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0368-4814</issn><issn publication-format="electronic">2587-9359</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">26275</article-id><article-id pub-id-type="doi">10.17816/KMJ2020-206</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Theoretical and clinical medicine</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Теоретическая и клиническая медицина</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Causes of hypocalcemia after thyroid surgery</article-title><trans-title-group xml:lang="ru"><trans-title>Причины гипокальциемии после операций на щитовидной железе</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Hummatov</surname><given-names>A F</given-names></name><name xml:lang="ru"><surname>Гумматов</surname><given-names>Азер Фарахим оглы</given-names></name></name-alternatives><address><country country="AZ">Azerbaijan</country></address><email>rjafarova@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Abbasov</surname><given-names>A H</given-names></name><name xml:lang="ru"><surname>Аббасов</surname><given-names>Аббас Гусейн оглы</given-names></name></name-alternatives><address><country country="AZ">Azerbaijan</country></address><email>rjafarova@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ismayilov</surname><given-names>A K</given-names></name><name xml:lang="ru"><surname>Исмайлов</surname><given-names>Араз Камран оглы</given-names></name></name-alternatives><address><country country="AZ">Azerbaijan</country></address><email>rjafarova@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gasymov</surname><given-names>E M</given-names></name><name xml:lang="ru"><surname>Гасымов</surname><given-names>Эльнур Мубариз оглы</given-names></name></name-alternatives><address><country country="AZ">Azerbaijan</country></address><email>rjafarova@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Azerbaijan Medical University</institution></aff><aff><institution xml:lang="ru">Азербайджанский медицинский университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-04-13" publication-format="electronic"><day>13</day><month>04</month><year>2020</year></pub-date><volume>101</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>206</fpage><lpage>211</lpage><history><date date-type="received" iso-8601-date="2020-04-07"><day>07</day><month>04</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Hummatov A.F., Abbasov A.H., Ismayilov A.K., Gasymov E.M.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Гумматов А.Ф., Аббасов А.Г., Исмайлов А.К., Гасымов Э.М.</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Hummatov A.F., Abbasov A.H., Ismayilov A.K., Gasymov E.M.</copyright-holder><copyright-holder xml:lang="ru">Гумматов А.Ф., Аббасов А.Г., Исмайлов А.К., Гасымов Э.М.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by-nc-sa/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://kazanmedjournal.ru/kazanmedj/article/view/26275">https://kazanmedjournal.ru/kazanmedj/article/view/26275</self-uri><abstract xml:lang="en"><p><bold>Aim.</bold> To identify the causes affecting hypocalcemia and its frequency of causing after thyroidectomy.</p> <p><bold>Methods.</bold> The study included 402 patients after thyroidectomy, 361 (89.8%) women and 41 (10.2%) men, for the period 2015–2019. The patients were between the ages of 14 and 77 years (average 45±27.2 years). Patients were tested for the presence of hyperthyroidism, the volume of tissue removed and type of thyroidectomy, presence of repeated thyroid operations and accidental parathyroidectomy, the results of parathyroid autotransplantation and pathohistological reports. To determine the effect of these factors on hypocalcemia, patients were divided into three groups. The first group included patients (n=51, 12.7%) were underwent surgery for Graves’ disease, the second (n=335, 83.3%) — for nodular goiter, and the third (n=16, 4%) — for recurrent goiter. Statistical data analysis was performed with IBM SPSS 16.0. The results were analyzed by one-way analysis of variance or Kruskal–Wallis test and the median test. Results were considered statistically significant at p &lt;0.05 (two-sided criterion).</p> <p><bold>Results.</bold> In the early postoperative period, 20 (5%) of 402 patients had hypocalcemia, of which 12 (3%) had transient hypocalcemia, and 8 (2%) had permanent hypocalcemia. Postoperative hypocalcemia was detected in 9 (17.6%) patients the first group, 8 (2.4%) patients — in the second group, and 3 (18.8%) patients of the third group. Patients’ hypocalcemia was characterized based on the types of underwent operations as follows: in 14 (5.3%; p &lt;0.05) patients after total thyroidectomy, in 1 (3.2%) patient after close to total thyroidectomy, in 1 (16.7%) patient after total thyroidectomy with central lymphatic dissection, in 1 (20%) patient after total thyroidectomy with central and lateral lymphatic dissection, in 3 (18.8%) patients after repeated surgery. Postoperative hypocalcemia was identified in 5 of 44 patients of the second group with thyroid carcinoma, as well as in 1 patient of the third group with the same pathology (p=0.246).</p> <p><bold>Conclusion.</bold> Incidence of hypocalcemia was more frequent after surgery for hyperthyroidism, especially after total thyroidectomy; in 40% of cases, transient hypocalcemia was identified in patients with autotransplantation of the parathyroid gland after an accidental parathyroidectomy.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель.</bold> Определить причины, влияющие на гипокальциемию, и её частоту после оперативных вмешательств на щитовидной железе.</p> <p><bold>Методы.</bold> Проведён анализ результатов лечения 402 больных после тиреоидэктомии, 361 (89,8%) женщины и 41 (10,2%) мужчины, за период 2015–2019 гг. Возраст пациентов составлял 14–77 лет (средний возраст 45±27,2 года). У больных были изучены наличие гипертиреоза, объём и вид тиреоидэктомии, наличие повторных тиреоидных операций и случайной паратиреоидэктомии, результаты паратиреоидной аутотрансплантации и патогистологические отчёты. С целью определения влияния этих факторов на гипокальциемию больные были разделены на три группы. В первую группу вошли пациенты (n=51, 12,7%), оперированные по поводу болезни Грейвса, во вторую (n=335, 83,3%) — по поводу узлового зоба, в третью (n=16, 4%) — по поводу рецидивного зоба. Данные, полученные во время исследования, были проанализированы с помощью компьютерной программы IBМ SPSS 16.0. Проведён односторонний дисперсионный анализ — Kruskal–Wallis и Median-тест. Результаты считали статистически значимыми при p &lt;0,05.</p> <p><bold>Результаты.</bold> В раннем послеоперационном периоде у 20 (5%) больных из 402 зарегистрирована гипокальциемия, у 12 (3%) она была транзиторной, у 8 (2%) — постоянной. Послеоперационная гипокальциемия выявлена у 9 (17,6%) больных первой группы, 8 (2,4%) пациентов второй и 3 (18,8%) больных третьей группы. Гипокальциемия по поводу видов перенесённых операций была охарактеризована следующим образом: у 14 (5,3%; p &lt;0,05) человек — после тотальной тиреоидэктомии, у 1 (3,2%) — после близкой к тотальной тиреоидэктомии, у 1 (16,7%) — после тотальной тиреоидэктомии с центральной лимфодиссекцией, у 1 (20%) — после тотальной тиреоидэктомии с центральной и латеральной лимфодиссекцией, у 3 (18,8%) — после повторной операции. Послеоперационная гипокальциемия была отмечена только у 3 (18,8%) из 16 больных третьей группы, из которых у 2 (12,5%) была транзиторная гипокальциемия, у 1 (6,3%) — постоянная. У 5 из 44 больных второй группы с карциномой щитовидной железы, а также у 1 пациента третьей группы с одинаковой патологией была зафиксирована послеоперационная гипокальциемия (р=0,246).</p> <p><bold>Вывод.</bold> Случаи гипокальциемии чаще встречались после операций по поводу гипертиреоза, особенно после тотальных тиреоидэктомий; в 40% случаев гипокальциемия выявлена у больных с аутотрансплантацией паращитовидной железы после случайной паратиреоидэктомии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>thyroid gland</kwd><kwd>thyroidectomy</kwd><kwd>hypocalcemia</kwd><kwd>Graves’ disease</kwd><kwd>hyperthyroidism</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>щитовидная железа</kwd><kwd>тиреоидэктомия</kwd><kwd>гипокальциемия</kwd><kwd>болезнь Грейвса</kwd><kwd>гипертиреоз</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Karamanakos S.N., Markou K.B., Panagopoulos K. et al. 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