Specific features of Bazhenov suite sediments in south-eastern Nurolsk sedimentary basin (Tomsk Oblast)

The specific sediment features in Georgiev (J[3]kmgr), Bazhenov (J3vbg) and Kulomzin (K1bkl) suites, exposed by drilling in the S-E Nurolsk depression (Tomsk Oblast), were defined and described via petrographic, X-ray diffraction and fluorescence-microscopy analysis methods. The classification of agrillites was identified, the structure-texture features, composition, voids and bitumen types and their distribution were determined. It was defined that Bazhenov suite argillites are characteristic of fine-dispersion, high biogenic silica content and scattered organic matter, enriched multi-composite syngenetic bitumen (from light to resin-asphaltine), as well as fractured surface where the migration of light bitumen occurs

Cardiovascular status and echocardiographic changes in survivors of COVID-19 pneumonia three months after hospital discharge

Coronavirus disease 2019 (COVID-19) affects the function of all organs and systems. Today, studying the effect of COVID-19 on cardiovascular system, including on echocardiographic characteristics, is relevant.Aim. To study the prevalence of symptoms, cardiovascular disease and changes in echocardiographic data in persons after documented COVID-19 pneumonia 3 months after discharge from the hospital.Material and methods. The study included 106 patients after documented COVID-19 pneumonia. The patients underwent a comprehensive examination during hospitalization and 3 months±2 weeks after discharge from the hospital. The mean age of participants was 47±16 years (19-84 years); 49% of subjects were women.Results. Three months after hospital discharge, the symptoms persisted in 86% of examined patients. There were significant echocardiographic changes as follows: a decrease in LV end-diastolic, end-systolic and stroke volume (113,8±26,8 ml vs 93,5±29,4 ml; 37,7±13,0 ml vs 31,3±14,2 ml; 77,2±17,8 ml vs 62,2±18,7 ml, respectively, p<0,001 for all). The right ventricular anteroposterior dimension and the pulmonary trunk diameter decreased over time (26,0 [24,0-29,3] mm vs 25,0 [23,0-27,0] mm, p=0,004; 21,7±3,6 mm vs 18,7±2,5 mm, p<0,001), the same as the pulmonary artery systolic pressure, estimated by tricuspid regurgitation gradient (28,0 [25,0-32,25] mm Hg vs 21,5 [17,0-25,0] mm Hg). The right atrial volume (42,0 [37,0-50,0] m><0,001), the same as the pulmonary artery systolic pressure, estimated by tricuspid regurgitation gradient (28,0 [25,0-32,25] mm Hg vs 21,5 [17,0-25,0] mm Hg). The right atrial volume (42,0 [37,0-50,0] ml vs 31,0 [22,0-36,5] ml, p<0,001) a><0,001) and maximum width (36,1±4,6 mm vs 34,5±6,5 mm, p=0,023) decreased, while the right atrial maximum length increased (46,7±6,8 mm vs 48,6±7,1 mm, p=0,021).Conclusion. In survivors of COVID-19 pneumonia three months after hospital discharge, complaints persisted in 86% of cases. Cardiovascular diseases were detected in 52% of participants, including hypertension in 48,1% and coronary artery disease in 15,1%. Compared with in-hospital data, the echocardiographic characteristics improved, which was expressed mainly in a decrease in right heart load

Echocardiographic characteristics of COVID-19 pneumonia survivors three months after hospital discharge

Coronavirus disease 2019 (COVID-19) is an infectious disease that affects almost all organs and systems. The main target is the respiratory system, but cardiovascular involvement is also common. Today, it is relevant to study the effect of complicated COVID-19 course on the patient’s cardiovascular system after hospital discharge — in particular, echocardiographic parameters.Aim. To study the echocardiographic parameters of patients with COVID-19 pneumonia 3 months after discharge from the hospital.Material and methods. The study included 106 patients with documented COVID-19 pneumonia. Patients underwent a comprehensive examination during hospitalization and 3 months ± 2 weeks after hospital discharge. The mean age of participants was 47±16 years (from 19 to 84 years), while 49% were women.Results. Three months after discharge, the average body mass index of the subjects was 28,2±5,7 kg/m2. Obesity was noted in 37,1%, cardiovascular diseases — in 52%. According to echocardiography, the prevalence of right ventricular (RV) dilatation was 2,9%, a decrease in tricuspid annular plane systolic excursion (TAPSE) — 9,5%, grade ≥2 tricuspid regurgitation — 1,9%, pulmonary hypertension (pulmonary artery systolic pressure >36 mm Hg) — 3,8%. The mean value of RV global longitudinal myocardial strain (GLMS RV) and global longitudinal myocardial strain (GLES RV) was 19,6±4,5 and 20,6±4,6, respectively. We found moderate correlations between GLMS RV and blood flow time through the left ventricular outflow tract (OT) (r=-0,436), through the mitral valve (r=-0,390; both p<0,0001) and through the RVOT (r=-0,348; р=0,004), with cardiac index (CI) (r=0,316; p=0,009), as well as between GLES RV and blood flow time through the LVOT (r=-0,411; p<0,0001) and RVOT (r=-0,300; p=0,005), and with CI (r=0,302; p=0,004). At the same time, the correlation of GLES RV with RV fractional area change (FAC) was weak (r=-0,283; p=0,007), while there was no correlation with the TAPSE. In addition, correlation of GLMS RV with these parameters were not defined.Conclusion. Three months after COVID-19 pneumonia, RV strain parameters were shown to have stronger relationships with time characteristics of flows in LVOT and RVOT, as well as with CI, than with such generally accepted characteristics of RV function as FAC and TAPSE

Профилактика и лечение железодефицитной анемии у детей первого года жизни

The article presents features of physiological processes and pathological conditions in under one-year children that predispose the development of iron-deficiency anemia. Basic methods of iron deficiency prophylaxis and principles of iron drug selection and dose selection for iron-deficiency anemia treatment for children in the stated age category are described in the article. Particular attention is paid to the prevention and treatment of iron deficiency anemia in preterm infants; foreign and domestic recommendations on this issue are presented. A practicing pediatrician needs to know the features of the disease’s development and treatment caused by differences in physical conditions accompanied by a high activity of metabolic processes and the immaturity of the young patients’ anatomic structures in order to identifiy and select the right iron-deficiency anemia treatment strategy.В статье представлены особенности физиологических процессов и патологических состояний у детей первого года жизни, предрасполагающих к развитию железодефицитной анемии (ЖДА). Описаны основные способы профилактики железодефицитных состояний, а также принципы выбора препарата железа и его дозы для лечения ЖДА у детей указанной возрастной категории. Особое внимание уделено профилактике и лечению ЖДА у недоношенных детей, представлены зарубежные и отечественные рекомендации по данному вопросу. Практикующему педиатру для своевременного выявления и выбора правильной тактики лечения ЖДА у детей первых 12 мес жизни необходимы знания об особенностях развития и лечения патологии, обусловленных отличиями физиологического состояния на фоне высокой интенсивности обменных процессов и незрелости анатомических структур у маленьких пациентов

Reachability in one-dimensional controlled polynomial dynamical systems

In this paper we address the reachability problem in controlled o-minimal dynamical systems. This problem can be formulated as follows. Given a controlled o-minimal dynamical system and a target set, starting at an initial point, is there a finite choice of time points and control parameters applied at these points such that the target set is reachable. We prove the existence of a finite control stategy and construct an algorithm which provides finite control strategies for one-dimensional controlled polynomial dynamical systems.We also provide a complexity result which shows upper bounds on the numbers of switches in finite control strategies

Immunostimulatory therapy of frequent respiratory infections in children

Acute respiratory infections (ARI) are associated with high risk of complications and account for the highest percentage in pediatric morbidity. ARVI complications are usually caused by bacteria. The multimodal treatment should include etiotropic, symptomatic and immunomodulatory therapy. Immunomodulatory therapy has an important role during the acute phase of the disease, as well as in the convalescent period of acute respiratory disease

Cough. What shall we do, how can we help?

The article tells about the main causes of cough in children, differential diagnosis of cough in various bronchopulmonary diseases. The key features of major diseases associated with cough symptoms are described; current approaches to the choice of antitussive therapy in children are considered

Semantic Characterisations of Second-order Computability Over the Real Numbers

We propose semantic characterisations of second-order computability over the reals based on -denability theory. Notions of computability for operators and real-valued functionals dened on the class of continuous functions are introduced via domain theory. We consider the reals with and without equality and prove theorems which connect computable operators and real-valued functionals with validity of nite -formulas.