[Exudative pericarditis with tamponade after COVID-19. Case report].

A description of a COVID-19 patient with the development of exudative pericarditis complicated by cardiac tamponade is provid. A peculiarity of this case is the presence of an underlying disease in the patient (chronic lymphocytic leukemia), which was in remission for 1.5 years after chemotherapy.

First Results of the Implementation of the Doppler Backscattering Diagnostic for the Investigation of the Transition to H-Mode in the Spherical Tokamak Globus-M2.

This paper presents the first results of a study of the LH transition on the new spherical Globus-M2 tokamak using the Doppler backscattering (DBS) diagnostic. New data characterizing the H-mode of discharges with higher values of the plasma parameters, such as magnetic field B up to 0.9 T and plasma current I up to 450 kA, were collected and analyzed.

A method for intra-percardial PDT for malignant mesothelioma.

We describe a case of a 35-year-old patient with recurrent non-resectable pleural mesothelioma cT4N0M0 with a confirmed malignant pericardial effusion, threatening for cardiac tamponade. We performed and described our experience of intrapericardial photodynamic therapy which was well tolerated and with a good survival result. After 12 months of follow-up our patient showed no signs of pericardial effusion and in stable condition, keeping high level of quality of life.

Endovenous laser coagulation: asymmetrical heat transfer and coagulation (modeling in blood plasma).

The objective of this study was to describe the dynamics of blood plasma heating and coagulation processes carried out by continuous laser radiation with wavelengths 1.55 and 1.94 μm through bare-tip fibers and fibers with radial output (radial fibers) used for endovenous laser coagulation (EVLC).

Doppler backscattering diagnostic with dual homodyne detection on the Globus-M compact spherical tokamak.

This article considers a four-frequency microwave Doppler backscattering (DBS) system in the compact spherical tokamak Globus-M. The hardware was adequate for the purposes of studying the peripheral plasma in the tokamak. The multichannel DBS system is based on duplication of a dual homodyne detection circuit for four incident Ka-band frequencies.

Endovenous laser coagulation: asymmetrical heat transfer (modeling in water).

The objective of this study was to describe the dynamics of water heating carried out by continuous laser radiation with wavelengths 1.47, 1.55, and 1.

Extensive Contamination of Water with Saxitoxin Near the Dam of the Irkutsk Hydropower Station Reservoir (East Siberia, Russia).

An area of discolored water 50 m wide and 30 m long was found in September 2017 close to the dam of the Irkutsk hydroelectric power station. Water from this spot was sampled for investigation in the present study. Microscopic analysis revealed that the suspended matter in the sample was composed of clumps of filaments, vegetative cells, akinetes and heterocysts that formed short filaments and solitary cells.

Tomography diagnostic of plasma radiated power on the spherical tokamak Globus-M.

A diagnostic system for plasma radiated power tomography on Globus-M was upgraded with a new linear array based on silicon photodiodes. The hardware of the diagnostic system based on a 256-channel tangential matrix array and a 24-channel linear array is described. The algorithm for 2D tomographic reconstruction of plasma emissivity is presented.

Differential interference contrast tomography.

We present a new approach to optical tomography of phase objects that is referred to as differential interference contrast tomography (DICT). The main feature of DICT is that the result of tomographic reconstruction is a 3D DIC image. This image is described by partial derivative of 3D refractive index distribution in one direction.

[Laser lithotripsy].

The article describes the diverse methods of stone destruction in urolithiasis patients, including laser lithotripsy as the least traumatic and most efficient method of demolition of all types of urinary stones. Different types of lasers for intracorporeal lithotripsy have different mechanisms of stone fragmentation depending on the type of laser and its radiation parameters. The latest researches showed that new and promising laser modalities for lithotripsy are devices based on thulium (Tm) doped fiber laser, which can not only increase by several times the speed of the of stone fragmentation, but also minimizes the risks of surgical complications, due to the peculiarities of interaction between radiation and biological tissues.

Advanced method of phase shift measurement from variances of interferogram differences.

A new approach to the problem of measuring the phase shift from variances of interferogram differences based on Fourier domain analysis is proposed. It is shown that the use of true variance of the interferogram differences and spatial apodization of interferograms increases the accuracy of the phase shift of the measurement. Numerical simulations and experiments are presented.

Ex vivo laser thermoplasty of whole costal cartilages.

Background And Objective: To examine the possibilities of laser thermoplasty of whole costal cartilages for correction the human congenital chest wall deformities.

Study Design/materials And Methods: Ex vivo the samples of porcine costal cartilages were heated with lasers of differing wavelengths, including a 0.97-μm diode laser, a 1.

[Application of laser interference microscopy (LIM) for investigating the features of UV(B)-irradiated mouse peritoneal macrophages].

The plasma membrane dose-dependent damage of UV(B)-irradiated mouse peritoneal macrophages was investigated using laser interference microscopy (LIM). LIM is a method which allows one to estimate morphological and functional parameters of a cell without dyeing or introduction of other substances which can affect the cell condition. This makes it possible to reduce and accelerate the procedure of counting the damaged cells as compared with the methods using different dyes.

[Endovascular laser ablation with wavelength 1,560 nm for varicose veins].

In 2002 - 2008 more than 1000 patients with lower limb varicose veins were treated with endovenous laser coagulation (EVLC) of subcutaneous and perforating veins in the Therapeutic Rehabilitation Center. Usually we used laser wavelength between 915 and 980 nm; but recently 1,560-nm laser, which physical properties are quite different, was used for 43 patients, including 49 EVLCs for great (GSV) and lesser (LSV) saphenous veins and 15 EVLCs for perforating veins (PV). Interventional technique was similar to previously used.

[A research into the possibility of biological control over technophilic microorganisms using KSAP-U, a military device for biological reconnaissance].

The paper is dedicated to the detection of technophilic microorganisms, able to affect fuels, lubricants, and construction materials. The study demonstrated that indicator paper used in KSAP-U, a biological reconnaissance device, was able to detect technophilic test microorganisms in samples of rubber, turbonit, and the water phase of the "fuel-medium" system even when the degree of material affection was minimal. The authors suggest the practical application of these means for the express indication of technophilic microorganisms in technical objects.

[Quantitative aspects of an analysis of the multicomponent system during its transition to a qualitatively new condition].

The paper shows that any system acquires a qualitatively new state if the elements of this system change in number (increase or decrease relative to the standard reference point, i.e. normalcy, the prior status of the system, etc.

[Percutaneous laser denervation of the zygapophyseal joints in the pain facet syndrome].

Percutaneous laser denervation of archoappendicular joints in spinal pain was made in 15 patients from a study group. Percutaneous high-frequency denervation of archoappendicular joints was performed in a control group consisting of 15 patients with facet syndrome. A preoperative protocol for each patient included at least two diagnostic segmental blocks.

[Maintenance of cold chain for the delivery of immunobiological drugs by the indicators of heating and freezing controls].

The paper deals with an objective evaluation of a qualitative storage of immunobiological drugs including all stages of "cold chain". The results of technological research and of designing related with constructing a system of indicators for monitoring the temperature regime to maintain the "cold chain" functioning are presented. The suggested devices are comparatively described.

[An unusual type of the chromatography profile of blood serum carbohydrates in the diagnosis of deep mycosis by gas and liquid chromatography].

The paper contains a description of a diagnosis method (now under elaboration) applicable to human mycosis, which is based on a high-sensitivity gas-liquid chromatography. According to the study results, despite its promising nature, the method in question is not accurate enough in terms of a precise diagnosis of invasive candidosis in oncology patients. The authors point out that the chromatography-diagnosis results need now a histological confirmation.

[Electrical stimulation of the spinal cord in cardiovascular disease].

The early and late outcomes of electrical stimulation of the spinal cord are analyzed in chronic critical ischemia of the lower extremities and coronary heart disease with peripheral involvement of coronary arteries. The clinical capacities of this treatment that has enjoyed little use in our country due to its high cost showed atraumaticity of electrical stimulation of the spinal cord; a few cases of complications and no hospital mortality; a rapid positive clinical effect after the initiation of electric neurostimulation, and better life quality in patients in the postoperative periods.

[Rapid indication of microbiological damage and biodegradation of structural materials in space vehicles].

The study was undertaken to design a kit of indicators for rapid detection and group identification of microbes causing biological damages to the materials. Indication is accomplished by dropwise colorimetric reaction for which modified chromatographic materials serve as substrates. Reactions are made by the indicators whose design allows reagents and samples to be measured on board space vehicles.

[Disruption of microbiocenosis of the large intestine and the immune and interferon status in children with bacterial complications of acute viral infections of the respiratory tract and their correction by high doses of bifidumbacterin forte].

One hundred and twenty-nine children with acute viral and bacterial infection of the respiratory tract were examined and disturbance of the large intestine microflora was detected. It was characterized by significant reduction of lactobacilli, moderate growth of opportunistic bacteria and higher contents of Candida. Changes in T- and especially B-cellular immunity were observed in 35 per cent of the patients.