Некоторые особенности гормонального статуса в случаях с врожденной эктопией шейки матки

The article presents data on the effects of ovarian hormones on the development of congenital cervical ectopia in young iparous women. Found that the pathological course of pregnancy leads to changes in the fetoplacental system, and results in a decrease of estriol concentration and increase of progesterone protective compensatory levels.В статье представлены данные о влиянии яичниковых гормонов на развитие врожденной эктопии шейки матки у молодых нерожавших женщин. Обнаружено, что патологическое течение беременности приводит к изменениям в фетоплацентарной системе, проявляющимся в уменьшении концентрации эстриола и защитно-компенсаторном увеличении прогестерона

Современные аспекты применения заместительной гормональной терапии при коррекции нарушений со стороны сердечно-сосудистой системы у женщин с климактерическим синдромом

Hormone replacement therapy (HRT) has been widely used for reliving climacteric disorders. The purpose of present study is to evaluate myocardium function in case of HRT application. Application of hormone replacement therapy has enhanced microcirculation and myocardium metabolism if cardiac embarrassment was induced by pathology in endocrine and central nervous system.В работе изучено состояние миокарда у больных с климактерическим синдромом и произведена оценка влияния ЗГТ на имеющиеся нарушения. Показано, что изменения со стороны ССС при КС, нормализация которых происходит в процессе применения ЗГТ, носят метаболический характер и обусловлены патологическими процессами в эндокринной и ЦНС, наблюдаемыми при данном заболевании

Non-conserved dynamics of steps on vicinal surfaces during electromigration-induced step bunching

We report new results on the non-conserved dynamics of parallel steps on vicinal surfaces in the case of sublimation with electromigration and step-step interactions. The derived equations are valid in the quasistatic approximation and in the limit $f^{-1}\gg l_D\gg l_{\pm} \gg l_i$, where $f$ is the inverse electromigration length, $l_D$ the diffusion length, $l_{\pm}$ the kinetic lengths and $l_i$ the terrace widths. The coupling between crystal sublimation and step-step interactions induces non-linear, non-conservative terms in the equations of motion. Depending on the initial conditions, this leads to interrupted coarsening, anticoarsening of step bunches or periodic switching between step trains of different numbers of bunches.Comment: 11 pages, 4 figures; revised and extended versio

Measurement of \Gamma_{ee}(J/\psi)*Br(J/\psi->e^+e^-) and \Gamma_{ee}(J/\psi)*Br(J/\psi->\mu^+\mu^-)

The products of the electron width of the J/\psi meson and the branching fraction of its decays to the lepton pairs were measured using data from the KEDR experiment at the VEPP-4M electron-positron collider. The results are \Gamma_{ee}(J/\psi)*Br(J/\psi->e^+e^-)=(0.3323\pm0.0064\pm0.0048) keV, \Gamma_{ee}(J/\psi)*Br(J/\psi->\mu^+\mu^-)=(0.3318\pm0.0052\pm0.0063) keV. Their combinations \Gamma_{ee}\times(\Gamma_{ee}+\Gamma_{\mu\mu})/\Gamma=(0.6641\pm0.0082\pm0.0100) keV, \Gamma_{ee}/\Gamma_{\mu\mu}=1.002\pm0.021\pm0.013 can be used to improve theaccuracy of the leptonic and full widths and test leptonic universality. Assuming e\mu universality and using the world average value of the lepton branching fraction, we also determine the leptonic \Gamma_{ll}=5.59\pm0.12 keV and total \Gamma=94.1\pm2.7 keV widths of the J/\psi meson.Comment: 7 pages, 6 figure

Study of KS KL Coupled Decays and KL -Be Interactions with the CMD-2 Detector at VEPP-2M Collider

The integrated luminosity about 4000 inverse nanobarn of around phi meson mass ( 5 millions of phi mesons) has been collected with the CMD-2 detector at the VEPP-2M collider. A latest analysis of the KS KL coupled decays based on 30 % of available data is presented in this paper. The KS KL pairs from phi meson decays were reconstructed in the drift chamber when both kaons decayed into two charged particles. From a sample of 1423 coupled decays a selection of candidates to the CP violating KL into pi+ pi- decay was performed. CP violating decays were not identified because of the domination of events with a KL regenerating at the Be beam pipe into KS and a background from KL semileptonic decays. The regeneration cross section of 110 MeV/c KL mesons was found to be 53 +- 17 mb in agreement with theoretical expectations. The angular distribution of KS mesons after regeneration and the total cross section of KL for Be have been measured.Comment: 14 pages, 8 figure

Search for rare Phi decays in pi+ pi_ gamma final state

A search for phi radiative decays has been performed using a data sample of about 2.0 million phi decays collected by the CMD-2 detector at VEPP-2M collider in Novosibirsk. From the selected e+ e- -> pi+ pi- gamma events the following results were obtained: B(phi -> f0(980) gamma) < 1x10-4 for destructive and B(phi -> f0(980) gamma) < 7x10-4 for constructive interference with the Bremsstrahlung process respectively, B(phi -> gamma -> pi+ pi- gamma) 20 MeV, B(phi -> rho gamma) < 7x10-4. From the selected e+ e- -> mu+ mu- gamma events B(phi -> mu+ mu- gamma) = (2.3+-1.0)x10-5 has been obtained for E of gamma> 20 MeV. The upper limit on the P,CP-violating decay eta -> pi+ pi- has also been placed: B(eta -> pi+ pi-) < 9x10-4 . All upper limits are at 90 % C.L.Comment: 18 pages, 7 figure

Search for electroweak production of single top quarks in ppˉp\bar{p} collisions.

We present a search for electroweak production of single top quarks in the electron+jets and muon+jets decay channels. The measurements use ~90 pb^-1 of data from Run 1 of the Fermilab Tevatron collider, collected at 1.8 TeV with the DZero detector between 1992 and 1995. We use events that include a tagging muon, implying the presence of a b jet, to set an upper limit at the 95% confidence level on the cross section for the s-channel process ppbar->tb+X of 39 pb. The upper limit for the t-channel process ppbar->tqb+X is 58 pb. (arXiv

Hard Single Diffraction in pbarp Collisions at root-s = 630 and 1800 GeV

Using the D0 detector, we have studied events produced in proton-antiproton collisions that contain large forward regions with very little energy deposition (``rapidity gaps'') and concurrent jet production at center-of-mass energies of root-s = 630 and 1800 Gev. The fractions of forward and central jet events associated with such rapidity gaps are measured and compared to predictions from Monte Carlo models. For hard diffractive candidate events, we use the calorimeter to extract the fractional momentum loss of the scattered protons.Comment: 11 pages 4 figures. submitted to PR

Эффективность использования 3D-имплантатов с биоактивными свойствами для замещения обширных дефектов костей: экспериментальное исследование

Background. The problem of replacing extensive bone defects remains relevant. The use of implant structures with bioactive properties can stimulate osteogenesis, which will improve the final treatment result.The aim of the study. In an in vivo experiment, to study the possibility of replacing an extensive defect in the bone diaphysis with a personal bioactive cellular 3D implant and evaluate the long-term results of its use.Materials and Methods. In an in vivo experiment, adult large mongrel dogs (n = 8) were modeled with an extensive segmental defect of the tibial diaphysis measuring 4 cm. The defect was replaced with a cellular bioactive 3D implant made of titanium alloy Ti6Al4V, manufactured using the additive technology. The diameter of the cells was 1.5 mm on average. The walls of the implant had pores of 100– 300 μm in size. The inner and outer surfaces were coated with a calcium phosphate layer formed by micro-arc oxidation. The primary fixation was provided with the Ilizarov apparatus. In the early postoperative period, antibiotic prophylaxis with broad-spectrum drugs was performed. Clinical, X-ray, histological and statistical methods were used to analyze the results. The main control points were considered: the end of external fixation with the Ilizarov apparatus, after 180 days and 1 year after the termination of external fixation.Results. During the experiment, the death of animals and complications were not observed. The spatial location of the implant was preserved. The formation of a strong bone-implantation block occurred 37.2±6.3 days after the operation. During this period, the external fixation apparatus was dismantled. Osseointegration was provided under conditions of sufficient primary mechanical stability, due to the cellular structure of the implant, the presence of pores on its walls, and the osteoinductive properties of the applied calcium phosphate coating. The achieved degree of osseointegration persisted in long-term periods (6 months and 1 year after the termination of external fixation). The osteoinductive properties of the calcium phosphate coating were confirmed by the expression of osteopontin cells at all stages of the experiment. Outflow of Ca and P from bone fragments was not observed. An elastic sheath was formed on the surface of the implant, similar in structure to the periosteum. The implant cells were filled with a well-vascularized bone substrate. In the projection of the intermediate zone, compact bone tissue was formed, and in the projection of the medullary canal — reticulofibrous bone marrow. This indicates the possibility of organotypic remodeling of bone structures inside the implant.Conclusion. The results of the study showed the effectiveness of using a bioactive cellular 3D implant to replace an extensive defect in the shaft of the bone. The architectonics and osteoinductive properties of the implant surface contributed to the formation of complete osseointegration in a short time, while maintaining the achieved result in long-term periods.Актуальность. Проблема замещения обширных костных дефектов остается актуальной. Использование имплантационных конструкций с биоактивными свойствами может стимулировать остеогенез, что улучшит окончательный результат лечения.Цель исследования — в эксперименте in vivo изучить возможность замещения обширного дефекта диафиза кости персональным биоактивным ячеистым 3D-имплантатом и оценить отдаленные результаты его использования.Цель исследования — в эксперименте in vivo изучить возможность замещения обширного дефекта диафиза кости персональным биоактивным ячеистым 3D-имплантатом и оценить отдаленные результаты его использования.Материал и методы. В эксперименте in vivo взрослым крупным беспородным собакам (n = 8) моделировали обширный сегментарный дефект диафиза большеберцовой кости величиной 4 см. Дефект замещали ячеистым биоактивным 3D-имплантатом из титанового сплава Ti6Al4V, изготовленным по аддитивной технологии. Диаметр ячеек составлял в среднем 1,5 мм. Стенки имплантата имели поры размером 100–300 мкм. Внутренние и наружные поверхности были покрыты кальций-фосфатным слоем, сформированным методом микродугового оксидирования. Первичную фиксацию обеспечивали аппаратом Илизарова. В раннем послеоперационном периоде проводили антибиотикопрофилактику препаратами широкого спектра действия. Для анализа результатов использовали клинический, рентгенографический, гистологический и статистический методы. Основными контрольными точками считали: окончание внешней фиксации аппаратом Илизарова, через 180 сут. и через 1 год после прекращения внешней фиксации.Результаты. На протяжении эксперимента гибели животных и осложнений не наблюдали. Пространственное расположение имплантата сохранялось. Формирование прочного костно-имплантационного блока происходило через 37,2±6,3 сут. после операции. В этот период аппарат внешней фиксации демонтировали. Остеоинтеграция обеспечивалась в условиях достаточной первичной механической стабильности за счет ячеистой структуры имплантата, наличия пор на его стенках и остеоиндуктивных свойств нанесенного кальций-фосфатного покрытия. Достигнутая степень остеоинтеграции сохранялась и в отдаленные периоды (через 6 мес. и 1 год после прекращения внешней фиксации). Остеоиндуктивные свойства кальций-фосфатного покрытия подтверждались экспрессией клетками остеопонтина на всех этапах эксперимента. Оттока Са и Р из отломков кости не наблюдали. На поверхности имплантата была образована эластичная оболочка, по строению схожая с надкостницей. Ячейки имплантата были заполнены хорошо васкуляризированным костным субстратом. В проекции интермеди- арной зоны формировалась компактная костная ткань, а в проекции костномозгового канала — ретикулофиброзный костный мозг. Это свидетельствует о возможности органотипического ремоделировния структур кости внутри имплантата.Заключение. Результаты исследования показали эффективность использования биоактивного ячеистого 3D-имплантата для замещения обширного дефекта диафиза кости. Архитектоника и остеоиндуктивные свойства поверхности имплантата способствовали формированию полной остеоинтеграции в короткие сроки с сохранением достигнутого результата в отдаленные периоды

Lengthening and deformity correction of lower and upper limbs

The aim of this study is to evaluate the influence of the external fixation associated with intramedullary nailing on the healing index in limb lengthening. Material and Methods. This study was based on a series of patients with lower and upper limb length discrepancy of different etiologies. We evaluated results of treatment in patients undergoing limb lengthening with the combination of an external circular fixator and intramedullary nailing (154 cases). The Ilizarov frame (133 cases) or Taylor Spatial Frame (21 cases) were used in combination with flexible intramedullary nailing. Results. In all the groups of patients we observed a significant reduction of the Healing Index – inferior to 30 days/cm. There were 117 complications but only 10 of them influenced on results of treatment. Finally, results are distributed according to categories: I category – 114 cases (74%), IIa – 27 cases (17.5%), IIb – 3 cases (1.9%), IIIa – 9 cases (5.7%), IVa – 1 case (0.9%). Conclusion. Flexible intramedullary nailing provides multiple advantages to a method of limb lengthening. Flexible Intramedullary Nailing, when correctly applied, respects the bone biological features which are essential for successful limb lengthening.The major effect of application of the combination of external circular fixation with FIN is significant decrease of external osteosynthesis duration