Vol 12, No 3 (2021)

The review presents the pathogenetic, diagnostic, therapeutic and rehabilitation aspects of computer visual syndrome. The importance of an integrated approach to the implementation of treatment and rehabilitation measures is emphasized. The promising directions of scientific and practical activity on the problem of treating patients with computer visual syndrome symptoms from the standpoint of modern requirements for medical rehabilitation have been determined.

Despite the high level of modern technologies in the field of laboratory methods and imaging of the respiratory system, the problem of early and accurate differential diagnosis of inflammatory lung diseases remains important in practical medicine. It leads to improved treatment results and a reduction in the number of complications (pleural empyema, fistulas, mediastinitis, sepsis, etc.), and in some cases allows suspecting the presence of a primary purulent source in the body, such as that in the case of septic pulmonary embolism. The review covers the Staphylococcus aureus specifics as a pathogen of lung diseases, relevant epidemiology, pathogenesis, clinical features and imaging diagnostics of various types of inflammatory changes in the lungs with a focus on destruction.

Tomosynthesis is a modern effective and informative method of low-dose X-ray diagnostics, which allows obtaining a significant number of layered images with the subsequent volumetric image reconstruction. The use of tomosynthesis provides a one-time examination of a large anatomical area without loss of the image quality and diagnostics of difficult-to-visualize pathological changes that are not detected by digital radiography. The article presents an overview of the problem of improving low-dose imaging options in the radiation diagnostics, as well as the authors’ own data on the use of tomosynthesis for the diagnosis of community-acquired pneumonia in children.

Background: The study hypothesis is that the knowledge about the mechanical properties of biological tissues will help surgeons to choose a transplant.

Aim: To determine the optimal type of a graft, based on the assessment of the mechanical properties of three types of grafts used for the superior capsule reconstruction of the shoulder joint with a massive rotator cuff tear.

Methods: In the experimental work, 3 types of biological tissues were studied: allografts of the fascia lata and of the dura mater, and the DX Reinforcement Matrix (a dermal ECM xenograft). The experiment was divided into two parts. In the first part, the mechanical strength at rupture of the samples was evaluated and compared, in the second part the resistance of a vertical suture was studied. The tests included uniaxial stretching with the force and strain at rupture recorded.

Results: The fascia lata allograft showed the highest ultimate tensile strength, while the dura mater allograft had the lowest ultimate tensile strength. All the three materials showed rather high values of the rupture strain. The lowest value of the rupture strain was detected for the dura mater allograft — 15.2±2.6%, the highest value was obtained for the dermal ECM xenograft — 63.3±20.8%. The largest value of the fracture stress was recorded for the DX Reinforcement Matrix — 33.5 N. The minimum value was recorded for the fascia lata allograft — 9.9 N.

Conclusion: The fascia lata allograft and DX Reinforcement Matrix have the optimal mechanical characteristics and can be recommended as grafts for the superior capsule reconstruction of the shoulder joint with a massive rotator cuff tear.

Background: The increased incidence of cholelithiasis and tumoral lesions of the hepatopancreatoduodenal zone leads to an increase in the number of patients with obstructive cholestasis.

Aims: To identify the spectrum of pathological conditions developing after decompression of the biliary tract in obstructive cholestasis and to develop an effective pathogenetically determined algorithm for treating patients.

Methods: The results of the examination and treatment of 216 patients with obstructive cholestasis, who underwent various options for decompression of the biliary tract, were analyzed. Obstructive cholestasis of a tumor genesis was present in 112 (51.8%) patients, benign cholestasis in 104 (48.2%). The main group included 112 patients, the comparison group included 104 patients. A two-stage tactics was applied in 133 (61.6%) cases, 83 patients (38.4%) were operated in one stage. The treatment results were compared for the experimental group (n=112) in which a pathogenetically based algorithm was applied and for the control group (n=104) receiving a standard therapy.

Results: Accelerated decompression syndrome developed in 31 (14.3%) cases, of those 26 in the comparison group, 5 in the main group. Disorders of the water and electrolyte balance occurred in 32 (46.4%) patients with complete external bile diversion. Digestion remodeling syndrome was present in 44 patients from 117 patients with external bile diversion.

Conclusions: It has been shown that the pathogenetically based therapy after biliary decompression significantly reduces the number of complications in the postoperative period.

Background: More than 500 thousand new cases of malignant neoplasms are registered annually in the Russian Federation, of which more than 50 thousand new cases are due to hereditary forms. Improving the diagnosis of these diseases will make it possible to detect tumors at the early stages and take timely preventive and therapeutic measures.

Aims: Creation of a database and development of a software for the NGS data analysis for the prevention and early diagnosis of hereditary forms of oncological diseases.

Methods: The present study used 636 DNA samples obtained from cancer patients with a high hereditary risk or a burdened family history. DNA was isolated from blood lymphocytes. DNA libraries were prepared with a KAPA Target Enrichment Panel (Roche). The panel included probes for targeted enrichment of the coding region of 44 genes. NGS was performed on the MiSeq platform (Illumina).

Results: We identified 65 pathogenic/ probably pathogenic nucleotide sequence variants in 96 patients in the ATM, BLM, BRCA1, BRCA2, CHEK2, EPCAM, MEN1, MLH1, MSH2, MSH3, MSH6, MUTYH, PALB2, TP53 genes. We also identified 2858 nucleotide sequence variants of unknown clinical significance. Conclusions: We have created a local database that contains both genetic variants and clinical and anamnestic data. The database contains 4763 nucleotide sequence variants at the moment, among which 2522 are unique variants identified in a single patient.

Background: The main aim of Cardiac Resynchronization Therapy (CRT) is a positive response of the patient, particularly, reduction of the symptoms and improvement of the heart contractility, that can be reached in 50–70% of patients. The possibility of appropriate positioning the left ventricular (LV) lead is of great importance for the response to CRT. Certain instruments and technical approaches are used for the placement of the LV lead. Here, we describe the use of the orthodromic snare technique, which is quite rare in practice, but allows one to overcome some anatomical obstacles.

Clinical case description: Patient A., suffering from the heart failure with a low ejection fraction and left bundle branch block, was admitted to the hospital for CRT implantation. Before the operation, all the necessary routine instrumental and laboratory diagnostics was performed. During the operation, venography of the cardiac veins revealed unsuitability of the lateral cardiac vein for the placement of the LV lead due to its very small diameter. The posterolateral vein was suitable for the LV lead implantation but still had some anatomical difficulties: an acute angle of inflow and local stenosis in the proximal segment. During the procedure, the following techniques were used without success: positioning the LV lead by a simple translational movement forward, a subselective catheter, introduction of several coronary guides in order to smooth out the acute angle of inflow. These circumstances warranted the use of the orthodromic snare technique for a successful LV lead placement.

Conclusion: This clinical case illustrates the possibility of a safe and effective use of the orthodromic snare technique for LV lead implantation. Such anatomical difficulties as a small diameter, acute angle of inflow, local stenosis have also been illustrated and discussed.