The purpose of the study. To study the health status of employees of the sea, river fleet and mixed river — sea navigation on the basis of the results of mandatory periodic and preliminary medical examinations.

Materials and methods. The results of inspections of 2048 employees became the materials of the investigation.

Results. There is a high incidence of respirator, endocrine and cardiovascular diseases, which is formed against the background of exposure to a number of risk factors, primarily smoking and high blood pressure.

Conclusion. The most important component of health protection for this contingent of employees is the quality of preliminary and periodic medical examinations, the results of which will allow timely identification of chronic noncommunicable diseases and form a set of necessary rehabilitation measures.

Purpose. To conduct a study of the impact of the Arctic climate on the organ of vision. The results of the study show a high incidence rate according to the ophthalmic profile among the children of the New Land archipelago.

Conclusion. Practical recommendations for preventing the development of diseases of the organ of vision in children living in the Arctic are offered.

The aim of the study: to determine the dynamics of a functional state of the body of pilots and the engineering technical staff in the course of military occupational adaptation to new climatic conditions.

Materials and methods. The study enrolled military men aged 24–38 who were split into two groups: the first group (n=34) — the flight personnel, the second group — the engineering technical staff. The course of survey was divided into 3 phases.

Results and discussion. For the duration of follow-up, the control group showed increasing of indices of heart rate, cardiac output, double product and circulatory efficiency in comparison with the flight personnel group. In the first group, adaptation disorders were manifested with reducing scope allocation of attention as well as increasing index of instability of simple sensomotor reaction to photic stimulation.

Aim: substantiation of the need to create a system that allows the ship’s doctor to receive timely consultation assistance.

Materials and methods: When developing the technique, the method of diagnosing diseases of the abdominal organs on ships at sea using a computer, proposed by V. F. Ozerov (1984), was used.

Results and discussion: a method of collecting and transferring the patient data to the medical service of the fleet, Clinical Navy Hospital (CNH) of the fleet is proposed. The method allows the consultant to formulate proposals on further treatment strategy by the time of direct communication via videoconference. At the same time, the patient’s personal data remain effectively protected.

Introduction. The study of the central self-functions, manifested by an integral system of forms of mental activity, is highly relevant in terms of optimizing the adaptation of naval specialists.

Purpose: to assess the central self-functions as predictors of adaptation in naval specialists from different age groups.

Materials and methods. 159 naval specialists were examined, divided into 3 age groups — group 1 (n=33) — persons aged 25 to 30 years, group 2 (n=68) — persons aged 31 to 40 years, and the third group (n=58) — persons aged 41 to 45 years, whose central self-functions were studied using Ammon’s self-structural test.

Results and discussion. It has been established that the constructive central I-functions of naval specialists contribute to the optimization of the adaptation of naval specialists, while the destructive central I-functions prevent this. The deficient central self-functions of naval specialists occupy an intermediate position between constructive and destructive indicators.

Conclusion. To optimize the adaptation of naval specialists, it is advisable to carry out corrective measures aimed at shifting the central self-functions towards design indicators.

Aim: theoretical study and modelling of dynamics of psychological state of the personnel of disabled submarine in different accident periods.

Materials and methods: theoretical analysis of literature sources in the context of psychological states of a person in emergency cases, including in seafarers divers, and materials describing chronology of accident progression at submarines.

Results and discussion: from the results of analysis of studies of psychological states and available information about accidents at submarines, systematization of theoretical data was carried out and factors affecting the change of psychological states of submarine personnel in different accident periods were described.

Aim of the work: to identify changes in renal function under the action of dosed hyperoxia using oral stress renal tests and to determine the relationship between the state of the functions of the excretory system and the body’s resistance to toxic effects of oxygen.

Materials and methods. A survey of 44 men was carried out. Changes in water-electrolyte metabolism and renal function were determined using developed oral renal stress tests.

Results and discussion. It has been shown that the normal functioning of the excretory system plays an important role in the high human resistance to the toxic effects of oxygen.

The aim of the work was to evaluate the epidemiological effectiveness of the topical form of the domestic antiviral drug gel Viferon ® (IFN-a-2b with antioxidants) in organized military training groups for the prevention of SARS in the conditions of the COVID-19 pandemic.

Materials and methods. The authors observed 458 cadets-pupils of the Nakhimov naval school of the Ministry of defense of the Russian Federation.

Conclusion. There was a statistically significant decrease in the incidence of ARVI cadets Nakhimov school in 2020 in April (p<0,001), may (p<0,05) and June (p<0,05) in 2020, which can be explained by the preventive use of the drug Viferon ® (gel).

Coronavirus infection has caused a global pandemic with high mortality rates among the population of different countries. Drugs for non-specific immunotherapy of this infection based on sodium aminodihydrophthalazinedione (in particular, Tameron) were not considered for this purpose. It has immunomodulatory properties, and its use is not accompanied by side effects. Tameron can become a potential complex drug for the treatment of coronavirus infection COVID-19 and its use is especially important in confined spaces on ships and vessels of the military and civilian fleets.

This paper continues our series of articles on required sample size for the most common basic statistical tests used in biomedical research. Sample size calculations are rarely performed in research planning in Russia often resulting in Type II errors, i.e. on acceptance on false null hypothesis due to insufficient sample size. The most common statistical test for analyzing proportions in independent samples is Pearson’s chi-squared test. In this paper we present a simple algorithm for calculating required sample size for comparing two independent proportions. In addition to manual calculations we present a step-by-step guide on how to use WinPepi and Stata software for calculating sample size for independent proportions. In addition, we present a table for junior researchers with already calculated sample sizes for comparing proportions from 0,1 to 0,9 by 0,1 with 95% confidence level and 80% statistical power.

Purpose: to analyze information on cases of evacuation of seafarers from seacrafts for medical reasons and make proposals on improvement of health maintenance for personnel of sea and river crafts.

Materials and methods: the analysis of information on cases of evacuation of seafarers from seacrafts for medical reasons for the period from 2014 to 2019 was carried out.

Results and discussion: increase in mean annual rate of evacuation and absolute number of evacuated seafarers for the period from 2014 to 2019 in comparison with previous period from 2009 to 2013 was revealed. Maximum number of evacuated seafarers among five sea basins for the period from 2014 to 2019 was observed in Far Eastern and Northern sea basins and is equal to 40% and 21% of the total number of evacuated seafarers. The formation of universal health care for sick and injured people at seacrafts in the Russian Federation as well as adoption of joint normative legal documents of Ministry of Labour and Ministry of Health of the Russian Federation on issues relating to organization of medical evacuation and application of telemedicine technologies is required.

The aim of the study was the assessment of features of surgeon training in the Department of Surgery at the Northern State Medical University of the Ministry of Healthcare of the Russian Federation. The analysis results revealed some methods and procedures that are used for teaching departmental surgery, issues of organization of Students’ Individual Work have been considered. Special focus was on the study of methods of interactive learning of surgical sciences, in particular, on simulation education. Features of practical studies combined with individual work (follow-up of patients, case history filling, research of material for case studies) were emphasized. Benefit of written examination for checking the capability of educand to apply gained knowledge in solving specific clinical issues.