Aim of study. To conduct a retrospective analysis of treatment outcomes for COVID-19 in unvaccinated and vaccinated patients.

Material and methods. The present retrospective single-center study included 209 patients who were vaccinated in history and hospitalized at the City Aleksandrovskaya Hospital for infection with COVID-19 in the period from April 5, 2020 to July 9, 2021. The average period between vaccine administration and hospitalization was 18.0 ± 11.0 days. In all cases, a positive result of the polymerase chain reaction (PCR) for the presence of SARS-CoV-2 was obtained. These patients were included in Group 1. The comparison group included 475 unvaccinated patients with comparable lung tissue damage according to multispiral computed tomography of the chest (MSCT) and a positive PCR result for the presence of SARS-CoV-2, selected randomly over the same observation period.

Results. The lesions of the lung tissue according to the results of chest MSCT upon admission of the group were comparable (p=0.55). All deaths were observed in the group of unvaccinated patients (n=46; 9.7%; p<0.0001). In all cases, the cause was an increase in multiple organ failure. In the same cohort of patients, there was a statistically significantly greater number of deep vein thrombosis of the upper and lower extremities (p=0.02). In the group of vaccinated patients (1st), arterial thrombosis of various location was not diagnosed, while in the 2nd group (comparison), this pathology was detected in every 10th patient. At the same time, thrombosis of the arteries of the lower extremities developed statistically more often (n=52; 10.9%; p><0.0001). This condition was accompanied by an increase in laboratory parameters of the inflammatory reaction and coagulopathy with the progression of lung tissue damage to the 3–4th degree according to the results of MSCT. However, in 37 (7.8%) cases, open thrombectomy was not possible, and on the first day after the operation, repeated thrombosis developed, followed by amputation of the limb. In 23 (4.8%) cases, a fatal outcome was observed. Conclusion Vaccination prevents the severe course of covid-19: the progression of pneumonia, coagulopathy, and inflammatory syndrome. In vaccinated patients, no deaths, pulmonary embolism were observed, which demonstrates the absence of a severe course of the disease. All arterial thrombosis associated with covid-19 develops in unvaccinated patients and is accompanied by a high incidence of repeated thrombosis, requiring subsequent amputation of the limb. The widespread introduction of vaccination will help reduce the severity of the course and prevent complications of the new coronavirus infection. Key words: COVID-19, novel coronavirus infection, thrombosis, SARS-CoV-2, vaccine>˂0.0001). In all cases, the cause was an increase in multiple organ failure. In the same cohort of patients, there was a statistically significantly greater number of deep vein thrombosis of the upper and lower extremities (p=0.02). In the group of vaccinated patients (1st), arterial thrombosis of various location was not diagnosed, while in the 2nd group (comparison), this pathology was detected in every 10th patient. At the same time, thrombosis of the arteries of the lower extremities developed statistically more often (n=52; 10.9%; p˂0.0001). This condition was accompanied by an increase in laboratory parameters of the inflammatory reaction and coagulopathy with the progression of lung tissue damage to the 3–4th degree according to the results of MSCT. However, in 37 (7.8%) cases, open thrombectomy was not possible, and on the first day after the operation, repeated thrombosis developed, followed by amputation of the limb. In 23 (4.8%) cases, a fatal outcome was observed.

Conclusion. Vaccination prevents the severe course of covid-19: the progression of pneumonia, coagulopathy, and inflammatory syndrome. In vaccinated patients, no deaths, pulmonary embolism were observed, which demonstrates the absence of a severe course of the disease. All arterial thrombosis associated with covid-19 develops in unvaccinated patients and is accompanied by a high incidence of repeated thrombosis, requiring subsequent amputation of the limb. The widespread introduction of vaccination will help reduce the severity of the course and prevent complications of the new coronavirus infection. 

COVID-19 is a disease that, in addition to respiratory failure, leads to thrombosis and bleeding due to coagulation disorders. Extracorporeal membrane oxygenation (ECMO), required in cases of a deterioration of gas exchange function of the lungs, contributes to changes in blood coagulation indicators, which leads to an increased risk of hemorrhagic complications and thrombosis. In the article, a clinical case of a severe course of COVID-19 is reported, which required ECMO. During the treatment, antithrombin-III was used, which allowed avoiding life-threatening complications and successfully completing the procedure. 

Aim of study. Analysis of the dynamics of resistant arterial hypertension (RAH) and the spectrum of adverse cardiovascular events in patients after classical carotid endarterectomy (CEE) with preservation of carotid body (CB) and eversion CEE with CB transection.

Material and methods. This cohort, comparative, retrospective, open-label study from January 2014 to December 2020 included 761 patients with hemodynamically significant stenosis of the internal carotid arteries (ICA) and RH lasting more than 3 years. Depending on the implemented revascularization strategy, 2 groups were formed: Group 1: 38.0% (n=289) — classical CEE with plasty of the reconstruction zone with a patch (made of diepoxy-treated xenopericardium or synthetic); Group 2: 62% (n=472) — eversion CEE with CB transection. To study the dynamics of systolic blood pressure (SBP) in the preoperative period for 4 days, and in the postoperative period, blood pressure was measured for 10 days (during the period when the patient was in intensive care - according to daily monitoring of blood pressure; in the department - 10 times per day, daily). The average SBP figures for all patients were taken into account when constructing a graph of BP fluctuations.

Results. In the postoperative period, the groups were comparable in the frequency of the following events: death (group 1: 0.34% (n=1), group 2: 0.63% (n=3); p=0.98; OR 0.54; 95% CI 0.05–5.21), myocardial infarction (group 1: 0.34% (n=1), group 2: 0.84% (n=4); p=0.71; OR 0, 40; 95% CI 0.04–3.65), ischemic stroke (group 1: 0.34% (n=1), group 2: 1.27% (n=6); p=0.36; OR 0.26; 95% CI 0.03–2.25), hemorrhagic transformation (group 1: 0%, group 2: 0.84% (n=4); p=0.29; OR 0.17; 95% CI 0.009–3.35). However, in terms of the number of all complications (death + myocardial infarction + ischemic stroke + hemorrhagic transformation) presented as a combined endpoint, patients after eversion CEE with CB transection were three times superior to classical surgery (group 1: 1.03% (n=3 ), group 2: 3.60% (n=17); p=0.05; OR 0.28; 95% CI 0.08–0.9).

Conclusion. The choice of a revascularization strategy in patients with hemodynamically significant ICA stenosis should be personalized and based on the conclusion of a multidisciplinary consultation, and not only on the preferences of the operating surgeon. In patients with RH, it is more expedient to use classical CEE with plasty of the reconstruction zone with a patch in view of the preservation of the CB during this operation. The intersection of the latter with eversion CEE provokes labile hypertension, progression of RAH and a statistically significant increase in the number of all unfavorable cardiovascular events. Thus, the use of carotid body preserving CEE in patients with RAH confirms the therapeutic mechanism of this manipulation in achieving the target SBP level. 

Currently, reperfusion therapy is the main method of treating patients with ischemic stroke (IS). The safety and efficacy of systemic thrombolytic therapy with a recombinant tissue plasminogen activator in patients with IS within 3 hours, and then 4.5 hours after the onset of symptoms of the disease was demonstrated in the NINDS (1995) and ECASS III (2008) studies. In 2018, based on the results of five studies, clear indications were formulated for performing thrombectomy (TE) in patients with IS, which involve the detection of thrombosis of a large stroke-associated artery. Given the continuous growth in the number of the adult population, which constitutes the bulk of patients with IS, information on the prevalence of patients with thrombotic occlusion of cerebral arteries, who are potential candidates for TE, may be important for regional vascular centers.

Aim of study. To describe IS patients admitted within the 6-hour “therapeutic window”.

Materials and methods. The study included 145 patients with cerebral IS who were admitted within the first 6 hours after the onset of symptoms of the disease. All patients underwent computed tomographic (CT) angiography in order to verify the occlusion of the cerebral artery.

Results. In our study, a correlation was established between the NIHSS severity of IS and the likelihood of verification of stroke-related artery thrombosis by CT angiography, but in 32.6% of patients with severe stroke (NIHSS at least score 14), no thrombotic occlusion was detected, and in 13% of patients with a clinic of mild acute cerebrovascular accident (NIHSS no more than 6), on the contrary, thrombotic occlusion was detected. Mortality in patients with verified thrombotic occlusion of the cerebral artery was higher than in patients without it (38% versus 10.5%, p<0.001). Such a significant difference in the mortality rate was due to the initially more severe stroke (NIHSS at admission 17 [10; 23] versus 5 [2; 10], p><0.001) in patients with thrombotic occlusion of a stroke-related artery, as well as a higher incidence of severe swallowing disorders (30% versus 9.5%, p ><0.002), which are a risk factor for pneumonia, as well as a higher frequency of such a comorbid background as chronic kidney disease and atrial fibrillation (30% versus 13.7%, p=0.018% and 58% versus 29.5%, p=0.001, respectively). CONCLUSION 1. Thrombosis of the cerebral stroke-associated artery was detected in 34.5% of patients with ischemic stroke who were admitted within the first 6 hours from the onset of the disease. 2. The main reason for the failure to perform thrombectomy in patients with ischemic stroke admitted within the 6-hour therapeutic window is the lack of verification of stroke-related artery thrombosis using computed tomographic angiography. Due to thrombosis at a different location (other than thrombosis of the internal carotid artery and / or M1 segment of the middle cerebral artery), 10% of patients with verified thrombosis did not meet the currently existing selection criteria for thrombectomy. Keywords: ischemic stroke, reperfusion therapy, cerebral artery thrombosis, cryptogenic stroke>˂0.001). Such a significant difference in the mortality rate was due to the initially more severe stroke (NIHSS at admission 17 [10; 23] versus 5 [2; 10], p˂0.001) in patients with thrombotic occlusion of a stroke-related artery, as well as a higher incidence of severe swallowing disorders (30% versus 9.5%, p˂0.002), which are a risk factor for pneumonia, as well as a higher frequency of such a comorbid background as chronic kidney disease and atrial fibrillation (30% versus 13.7%, p=0.018% and 58% versus 29.5%, p=0.001, respectively).

Conclusion. 1. Thrombosis of the cerebral stroke-associated artery was detected in 34.5% of patients with ischemic stroke who were admitted within the first 6 hours from the onset of the disease. 2. The main reason for the failure to perform thrombectomy in patients with ischemic stroke admitted within the 6-hour therapeutic window is the lack of verification of stroke-related artery thrombosis using computed tomographic angiography. Due to thrombosis at a different location (other than thrombosis of the internal carotid artery and / or M1 segment of the middle cerebral artery), 10% of patients with verified thrombosis did not meet the currently existing selection criteria for thrombectomy. 

Restenosis of the reconstruction zone is one of the main postoperative complications of vascular reconstructions, which develops in 18–40% of cases and leads to an increase in the risk of limb loss to 20–25%. The search for new markers for predicting the development of this complication is an urgent problem today.

Aim of study. To assess the dynamics of markers of apoptosis and cell proliferation at different times after endovascular intervention and their role in the development of restenosis of the reconstruction zone in patients with peripheral arterial disease (PAD).

Material and methods. The clinical study included 30 patients with PAD stage III disease. After further examination, the patients underwent endovascular intervention on the arteries of the femoral-popliteal segment. If restenosis developed, the patients were re-operated. In patients before surgery, within the first hour, and then on days 1, 7, 14, 21, 30 after the operation, venous blood was taken to determine the markers Bax, sFas, PDGF BB using enzyme immunoassay.

Results. After endovascular intervention, the first wave of apoptosis was triggered with an increase in the amount of proapoptotic protein Bax (p=0,00003) from 1 to 24 hours, followed by a decrease by day 7 (p=0.0008) compared to the amount on day 1. The PDGF BB level increased from day 1 after surgery (p=0.03) with maximum values on day 7 (p=0.0002) compared to the level on day 1. Then the second wave was triggered with a peak decrease in the level of the apoptosis inhibitor sFas on day 21 (p=0.002). After 9-12 months, restenosis of the intervention zone with a return of limb ischemia developed in 10 patients. During the first hour (p=0.004) in patients with restenosis, the level of Bax protein was significantly increased, with an increase in the level of PDGF BB by day 7 (p=0.011), and sFas by day 21 (p=0.0001), PDGF BB by the end of 1 month (p=0.004) compared to values in patients without this complication.

Conclusion. 1. Endovascular intervention causes two waves of apoptosis in the postoperative period. The first wave is associated with an increase in Bax protein in the first hours, followed by an increase in PDGF BB on day 7. The second wave of apoptosis is due to a decrease in the inhibitor of apoptosis — sFas for 21 days against the background of the shift of the PDGF BB to the initial level. 2. An increase in Bax protein within the first hours after surgery in the course of PDGF BB growth on day 7 with an increased amount of sFas on day 21 leads and PDGF BB by the end of 1 month leads to the development of restenosis of the intervention area. 

The relevance of the problem of ischemic stroke is difficult to overvalue in modern terms. The data on the frequency of occurrence and outcomes, especially among young people, force us to look for new strategies to minimize its consequences. Recent experimental studies have shown pronounced neurocardio-nephroprotective properties of lithium salts.

Aim of study. To evaluate the effect of lithium chloride on the lethality and severity of cognitive and neurological deficits in the modeling of ischemic stroke in rats.

Materials and methods. The study used mongrel male rats weighing 312±12.5 g. The model of Longa’s focal ischemia was used as a basis. The animals were divided into 5 groups: false-operated, control (model of ischemic stroke with the introduction of 0.9% NaCl) and three groups with the introduction of lithium chloride in various concentrations (4.2 mg/kg, 21 mg/kg and 63 mg/kg). The drug was administered daily for 14 days with a parallel assessment of neurological deficits.

Results. According to the results of the experiment, the following data were obtained with respect to lethality in the studied groups: false — operated 0 out of 8, control group — 13 out of 22 (lethality 59%), group 3 (LiCl 4.2 mg/kg) — 8 out of 14 (lethality 57%), p>0.05 with respect to control, group 4 (LiCl 21 mg/kg) — 6 out of 15 (lethality 40%) p>0.05 with respect to control and in group 5 (LiCl 63 mg/kg) — 4 out of 15 animals died (lethality 27%) p=0.0317. Lithium chloride at doses of 21 mg/kg and 63 mg/kg resulted in a decrease in the severity of neurological deficits on the second day of the experiment. On the 15th day of the experiment, there were no differences in the severity of neurological disorders. Also, the dosage of 63 mg/kg contributed to better memory retention during the assessment of cognitive functions.

Conclusion. Lithium chloride at a dosage of 63 mg/kg significantly (p=0.037) reduced the mortality and severity of neurological deficits in the simulation of experimental ischemic stroke in rats compared to the control group. 

Background. The preferred treatment for intra-articular displaced fractures is open reduction and internal fixation. The need to obtain a better visualization of the fracture geometry made it necessary to develop a large number of new approaches and their modifications.

Material and methods. The study included 186 patients with an intra-articular fracture of the distal humerus, who underwent plate osteosynthesis using the standard technique. The main group included 112 patients who were operated on using ETTA. The comparison group included 74 patients with a similar type of fracture, who were operated on using chevron olecranon osteotomy. The groups were comparable in terms of age, gender, mechanism of injury, and nature of the fracture. Long-term results were evaluated in 186 patients (minimum follow-up period – 12 months).

Results. Comparative analysis revealed that the time of surgery was reduced by an average of 20 minutes (p=0.03) in the main group. The immediate and medium-term results were assessed according to the data of physical examinations, control radiography, dynamics of the increase in the amplitude of motion in the elbow joint. The results were comparable. When assessing complications, the migration of fixators was detected in 5.5% in the main group and 16% in the comparison group. In the comparison group, failure of union of the olecranon after osteotomy, migration of wires with skin perforation, and reactive bursitis were observed.

Conclusion. 1. The extended transtriceps approach provides good visualization for fixing fractures of the distal humerus. 2. Evaluation of treatment results confirms that osteosynthesis using this access allows to reduce the time and trauma of the operation, to avoid complications associated with osteotomy of the olecranon, and to carry out successful postoperative rehabilitation, achieving good functional results. 

Partial-thickness burns (II degree according to ICD 10) remain a significant problem in combustiology. New approaches to the treatment of burn patients are associated with a group of modern dressings or skin substitutes based on natural biopolymers. Hyaluronic acid (HA) based polymers which is a natural component of the extracellular matrix, are promising.

Aims of study. А comparative study of the effectiveness of an atraumatic wound dressing based on a polyamide mesh and hyaluronic acid based wound dressings in the treatment of partial-thickness burns.

Material and methods. The work is based on the observation of 215 patients who were hospitalized in the Burn Department of the Far Eastern Medical Center in 2014–2018. All patients underwent surgical treatment of burn wounds - dermabrasion on days 2–3. To close of the postoperative wound, two types of dressings were used: based on hyaluronic acid (HA), n=61 and atraumatic dressings (AD), n=154. The effectiveness of treatment was assessed in terms of the healing time of burns, the severity of the general and local inflammatory response, and the quality of the restored skin.

Results. In the treatment with HA based dressings, burns healed five days faster; the wound healing time up to 21 days was noted in 90.2% of cases, with the use of AD — only in 57.1% of cases. HA dressings required replacement half as often as AD. With the use of HA dressings, the local and general inflammatory response to the burn wound developed less frequently and was managed faster. Resistant microorganisms and colonies with abundant growth, were found in the main group one and a half times less often than in the comparison group. When using HA dressings, the restored skin is much less likely to suffer from hypertrophy and scarring.

Conclusions. Treatment with HA-based wound dressings in patients with partial-thickness burns are more effective than treatment with traditional atraumatic dressing. Biopolymer skin substitutes is optimal for the treatment of partial-thickness burns in the postoperative period, since the frequency of dressings and the likelihood of secondary microbial contamination of wounds decreases, the degree of contamination of wounds with microflora decreases, and favorable conditions are created for the wound process. 

Despite the existing progress in providing care to patients with severe multisystem chest injury using advanced diagnostic methods, a high mortality rate still reaches 20–30%.

Aim of study. To assess the impact of early diagnosis and correction of chest injuries on the development of complications in patients with multisystem trauma.

Material and methods. The results of diagnosis and treatment of 89 patients with severe multisystem closed chest injury were studied. According to the time of admission to the Institute, the patients were divided into two groups: Group I, who were admitted to the Institute within the first hours after the injury (51 patients), and Group II, who were transferred from other medical institutions on the 3rd–7th day (38). CT was performed as a standard method of diagnosis and monitoring the dynamics of the process. With the development of purulent-inflammatory pulmonary complications, the bacteriological test of bronchoalveolar lavage was performed. Treatment included complex intensive therapy, drainage of the pleural cavity and emergency surgical interventions, if necessary.

Results. In Group I, lung contusion occurred in 43 (84%) patients, and after 7-10 days, the contusion foci partially regressed in 20 (46.5%) patients. In 8 (16%) patients with lung rupture, infiltrative changes in the lung were resolved on the 18th-30th day, while 4 (50%) of them had pneumonia outside the contusion zones. In Group II, patients were put on a ventilator and inflammatory changes in the lungs were revealed in 30 patients (79%). Lung rupture associated with the contusion was revealed in 2 (5.2%). When comparing the groups by the composition of the isolated microflora, it was found that in patients of group II, Acinetobacter spp was more often found (46.7% vs. 17.1% in group I patients, p=0.021) and Enterococcus spp. (30.0% and 8.6%, respectively, p=0.058), as well as Klebsiella pneumoniae (46.7% and 37.1%, p=0.6). At the same time, Staphylococcus aureus was not found in these patients, while it was detected in 14.3% of patients from Group I (p=0.09). Medical care in Group I was carried out according to the principles of the “golden hour”: within the first hour from the moment of admission to the patients with the presence of pneumothorax and hemothorax, the pleural cavity was drained. In Group II, this procedure was performed in other medical institutions and in 5 additional patients at the Institute.

Conclusions. Early computed tomography diagnosis of multisystem trauma makes it possible to assess the severity of injuries to the chest organs and other areas of the body and determine the treatment tactics. A comprehensive approach to the management of patients, including early diagnosis of trauma, drainage of the pleural cavity, determination of management tactics, bacterial test of the lower respiratory tract discharge, helps reduce infectious complications by an average of 45.46%. 

The problem of treatment for strangulated incisional hernia does not lose its relevance due to the large number of postoperative complications and high mortality rates, which significantly exceed these indicators in selective surgery. One of the solutions to this problem is to identify patients with a high risk of strangulation, which will allow you to perform the operation in a timely manner and avoid possible complications. The most relevant issue is the timing of surgery in patients with postoperative hernias after strangulation. 

The study of the clinical group of patients with self-poisoning with antihypertensive drugs is an urgent complex task due to its heterogeneity, high comorbidity of somatic and mental (depressive) disorders, as well as combination of a number of unfavorable social and environmental stress factors. In the present review, based on identifying the relatively specific psychological and sociodemographic groups, and risk factors of self-poisoning antihypertensive drugs the necessity of clinical-psychological support of patients with self-poisoning. General principles of suicide prevention among the groups most at risk in the primary care network formulated. 

The review presents the results of foreign studies related to geospatial analysis and modeling of the distribution of trauma centers and helicopter emergency medical services in developed regional trauma systems. The optimal number and geographical location of the trauma centers in the region is determined taking into account the timing of the delivery of victims to the trauma centers of a high level, population density, hospitalization of patients with severe trauma, and the frequency of inter-hospital transfers. The distribution of hospital resources of the trauma system should be based on the needs of the population, and vary depending on the geographical and social characteristics of the region. 

Due to the increase in injury rate and increased social activity in pregnant women, there is an increase in the number of abdominal injuries as a result of accidents, domestic conflicts, and abuse. The absence of systematic reviews and meta-analyses related to the algorithmization of treatment tactics for multisystem abdominal trauma leads to a large percentage of treatment and diagnostic errors and complications, high maternal and perinatal mortality, which, in turn, dictates the need to develop a standardized interdisciplinary approach to the management of this category of patients.

Aim of study. Standardization of the therapeutic and diagnostic approach to the treatment of pregnant women with multisystem closed abdominal trauma.

Material and methods. This literature review presents data from Russian and foreign publications from January 2015 to December 2020 from the electronic databases of PubMed, Cochrane Library, Scopus, eLibrary using the primary search strategy: trauma of pregnant women, multisystem closed abdominal trauma, damage control surgical treatment, emergency caesarean section, post-mortem caesarean section, treatment and diagnostic algorithm, obstetric bleeding, uterine rupture, placental abruption (total 571 publications), with the following exception from the request for non–full-text articles, publications not in Russian or English, manuscripts, dedicated to open trauma and obstetric complications of non-traumatic origin. The data extraction method was performed by two researchers independently of each other. We analyzed multicenter studies, large series of cases, original articles (11 retrospective studies with the selection of patients from 2001 to 2015; all 988 pregnant women with blunt abdominal trauma) and clinical recommendations; systematic reviews, meta-analyses, and randomized clinical studies for this period on multisystem closed trauma in pregnant women were not found. The levels of evidence and strength of recommendations in the review are derived from Russian and foreign clinical recommendations based on meta-analyses and systematic reviews prior to 2015.

Results. The treatment and diagnostic algorithm for multisystem abdominal trauma in pregnant women was standardized based on their hemodynamic status, and indications for minimally invasive and open interventions in this category of patients were clarified.

Conclusion. Timely diagnosing and multidisciplinary approach contribute to reducing both maternal and perinatal mortality. 

This review highlights current approaches to endovascular therapy of cerebral angiospasm in non-traumatic subarachnoid hemorrhage due to a ruptured cerebral aneurysm (CA). The main clinical guidelines for the management of patients with CA rupture are highlighted, clinical studies on the use of balloon angioplasty, intra-arterial administration of various vasodilators are presented, the advantages and complications of using various techniques are described. 

This article reports the main issues concerning the tactics of choosing the treatment of patients with occlusive-stenotic lesions of the aortoiliac segment. The key issues of the current Russian, European and American recommendations for revascularization of the peripheral vessels are demonstrated. Attention is paid to the latest studies comparing the results of open surgery and endovascular correction methods. Clinical cases are presented that demonstrate the optimal results of the use of endovascular technologies in conditions of extensive hemodynamically significant lesions and occlusion of the iliac arteries. The conclusion was made about the high efficiency and safety of interventional management in the treatment of patients with atherosclerotic lesions of the aortoiliac segment. 

Cardiovascular diseases are currently the most common causes of death worldwide, and most deaths from cardiovascular diseases are associated with coronary artery disease (CAD). CAD as a whole is a serious problem for the world’s population, and acute coronary syndrome (ACS) is associated with high morbidity, mortality and a great financial burden on the health care system. This is an urgent situation in which diagnostic and treatment measures must be performed as soon as possible from the moment of onset of the disease. Diagnosis of ACS begins with a thorough clinical assessment of the patient’s symptoms, electrocardiogram and blood troponin levels, as well as a history of the disease. Key components in the treatment of ACS include coronary revascularization when indicated and prompt initiation of adequate antiplatelet therapy. The presented literature review is devoted to the problems of adequate antiplatelet therapy in patients with ACS. 

Background. Acute cerebrovascular accidents in general, and ischemic stroke (IS) in particular, are multifactorial diseases with extremely heterogeneous and numerous risk factors. Currently, despite the development of diagnostic technologies, in approximately 25% of patients with IS, it is not possible to establish the causes and mechanism of its development (the so-called cryptogenic stroke (CS)). As a result, the optimal antithrombotic therapy as a secondary prevention in this group of patients remains unclear. It was found that in 10–20% of patients with CS, a detailed examination reveals oncological disease (OD). It is highly likely that the prevalence of OD-related IS will increase. The US National Cancer Registry has shown a decrease in mortality in patients with the most common forms of OD (lung, breast and prostate cancer). Active OD is a proven risk factor for both IS and other thrombotic events. Nevertheless, about 50% of IS in patients with OD are classified as cryptogenic, which significantly exceeds this indicator in patients without OD. This is associated with the difficulties of intravital diagnosis of the pathogenetic mechanism of IS in patients with OD.

Aim of study. Raising the awareness of neurologists about the causes, pathogenetic mechanisms of development and methods of diagnosing IS in patients with OD.

Materials and methods. To achieve this goal, the results of scientific research on OD as a risk factor for CS were analyzed. The literature search was carried out in electronic search engines Scopus, eLibrary, PubMed by keywords: ischemic stroke, cryptogenic stroke, cancer, pathogenesis of ischemic stroke. Scientific articles published between 1856 and 2021 were selected for analysis, 45% of the analyzed papers on the topic of CS were published not earlier than 5 years ago.

Conclusion. The cause of the development of ischemic stroke can be both the oncological process itself and the means and methods of treating it. Despite the fact that in 10–20% of patients with cryptogenic stroke OD is diagnosed, the question remains whether patients with cryptogenic ischemic stroke should be screened for latent oncological pathology, and if so, how full should the screening be. Typical radiological patterns of ischemic stroke in patients with OD are multiple foci of acute cerebral ischemia in different vascular areas, which may indicate a cardioembolic nature and, in particular, non-bacterial thrombotic endocarditis. Lifetime diagnosis of the causes of cryptogenic stroke in patients with OD is extremely difficult. Since nonbacterial thrombotic endocarditis is one of the leading causes of cryptogenic stroke in the setting of cancer, it is advisable to perform transesophageal echocardiography due to the low sensitivity of transthoracic echocardiography. 

Currently, there are no reference values for many laboratory indicators of homeostasis for gerontological patients, which complicates the objective interpretation of their disorders.

Aim of study. Based on a comparison of the reference values of some laboratory indicators of homeostasis of volunteers over 65 and people of working age, we offer their conditional norm for people of gerontological age.

Materials and methods. Studies of laboratory indicators of homeostasis were carried out in 25 volunteers aged 60 to 85 years. The comparison group consisted of 50 donors aged 18–59 years. Investigated indicators: lipid peroxidation and antioxidant blood system; factors of endogenous vascular regulation; apoptosis of peripheral blood lymphocytes; blood rheology; endotoxemia, immunology. Statistical analysis of the data was performed using the Statistica 10 software package (StatSoft, Inc., USA); when comparing the indicators, the nonparametric Mann–Whitney U test (abnormal distribution) was used.

Results. In elderly and senile people, due to physiological aging, as well as the influence of endogenous and exogenous factors and concomitant diseases, there are significant differences in the reference values of some laboratory parameters from the parameters of the same name for people of working age. 

In connection with the expansion of the administrative boundaries of the city of Moscow, the number of trauma cases, including those associated with road traffic accidents, man-made accidents, and industrial accidents, remains at a high level. The provision of emergency medical care and transportation of patients with acute trauma is one of the important tasks of the territorial center of disaster medicine in Moscow. Aeromedical evacuation of victims to hospitals of the metropolis allows adhering to the rule of the “golden hour”, which certainly affects the reduction of disability and mortality in road traffic incidents and accidents. 

Arteriovenous malformations (AVMs) of the brain are quite rare vascular pathologies, but they are life-threatening, due to the risk of intracerebral hemorrhage. Stereotactic radiosurgical treatment of patients with cerebral AVM is performed in cases where surgical removal is impossible or embolization with a stable occlusive effect cannot be performed. Currently, for the diagnosis of AVM, magnetic resonance imaging (MRI) is increasingly used because of its noninvasiveness and minimal risks. When a malformation is located in a functionally significant area, then a non-invasive technique is used to assess its interposition and mapping - functional magnetic resonance imaging.

We have presented the experience of radiosurgical treatment of a 43-year-old male patient with a ruptured AVM located in the left temporal lobe, near Wernicke’s area. The patient underwent stereotactic radiosurgical treatment with Elekta Leksell Gamma Knife Perfection device, taking into account the location of the AVM in a functionally significant area, preoperative mapping was performed. After two years, according to MR angiography, the arterial component in the projection of the irradiated AVM was not visualized, which was confirmed by the data of cerebral angiography. Thus, a clinical example has demonstrated the high efficiency of MRI in the diagnosis and assessment of the results of the performed stereotactic radiosurgical treatment of AVMs. 

Percutaneous endoscopic gastrostomy (PEG) is widely used in a group of patients with dysphagia syndrome who require nutritional support with enteral nutrition. In the above observation, a severe complication of PEG is secondary non-circumscribed serous-purulent peritonitis, which developed in connection with the failure of PEG, against the background of cachexia, hypoproteinemia and hypercatabolism. The operation of choice was video laparoscopic surgery, revision and sanitation of the abdominal cavity was performed. The main stage of the operation was gastropexy (the stomach wall to the parietal peritoneum) with three vicryl sutures, which made it possible to seal the gastrostomy area. 

Treatment of patients with chemical burns of the esophagus and stomach is a difficult task.

Perforation of the stomach or the formation of strictures of the esophagus, stomach, duodenum, and even the initial parts of the jejunum can be the outcome of chemical burns.

Patients with concomitant esophageal and gastric strictures are the most difficult to treat, which often requires multi-stage operations.

This article describes a clinical case of surgical treatment of a patient with a combined chemical burn of the esophagus and stomach with hydrochloric acid. One week after hospitalization, the patient had gastric perforation. The patient was urgently operated in the course of peritonitis. The peculiarity of the operation was that the surgeons, having made a gastrectomy, removed the esophageal stump to the anterior abdominal wall in the epigastrium and applied an enterostomy. In such a state with significant alimentary depletion (body mass index — BMI 15) on 11.10.02 the patient was taken to a Moscow clinic. A year later, the main surgical reconstructive treatment was performed — retrosternal bypass esophagoplasty of the right half of the large intestine and the terminal ileum in the isoperistaltic position, as well as extirpation of the esophagus. As a result of long-term treatment and several surgical interventions, a good short-term and long-term result was obtained. 

Acute barium poisoning is a rare but extremely dangerous type of poisoning in the structure of chemical injuries. The article provides a brief overview of the pathogenesis, clinical course and principles of intensive therapy of acute intoxication with this metal, as well as clinical examples of severe poisoning with barium salts with a negative and positive outcome in victims who used counterfeit barium carbonate instead of barium sulfate.