Introduction. The paper presents a correlation analysis between indicators of variability of heart rhythm and electroencephalogram among professional seafarers and expedition members who first set out on an Arctic voyage. The purpose of the work is to evaluate the compensatory-adaptive reactions of the brain and autonomic regulation of heart in seafarers and expedition members in the Arctic.Material and methods. Studies were carried out among groups of men of research vessels and expedition members of the Northern (Arctic) Federal University (NArFU) in the amount of 70 people. The subjects were divided into two groups – these are seafarers of the Professor Molchanov research vessel and the Neotrazimy marine rescue tugboat, as well as members of the NArFU expedition who participated in the Arctic marine expedition for the first time. To solve the tasks at the same time, an electroencephalogram (EEG) and heart rhythm variability (HRV) were measured at the beginning of the voyage (65 N) and at the end on the 20–30th day (78 N). Subsequently, a statistical analysis of the indicators and the calculation of correlations between groups were carried out.The results of the study showed that at the beginning of the flight, the subjects had high indicators of regulating body systems, due to the specifics of the influence of negative factors in the high latitudes of the Arctic. However, by the end of the month, a tendency towards a decrease in indicators of cardiac activity regulation and central nervous system (CNS) was observed in the group of seafarers. The obtained correlation relationships between the indicators can be used to control the adaptation of seafarers who first set out on an Arctic voyage.

The aim of this study was to determine the functional state of the affected hip joint after hip arthroplasty and to analyse patients’ quality of life during rehabilitation. Materials and methods. The study involved patients with 3rd degree hip osteoarthritis that underwent hip replacement. The research was conducted in three stages: 1) before the operation; 2) early postoperative rehabilitation period (10th – 12th day after the operation); 3) late recovery rehabilitation period (10th – 12th week after the operation). At stages 1 and 2, we examined 140 people (mean age 57.0 ± 9.0 years), at stage 3, 43 patients (mean age 55.81 ± 7.8 years). At all three stages, the patients’ hip range of motion, hip circumference and strength endurance of the affected limb were determined. The function of the hip joint was evaluated using the Harris Hip Score, and the quality of life was estimated with the help of the SF-36 questionnaire. Results. The research revealed that during the rehabilitation period, the range of motion increased significantly, hip flexion being restored best of all. Moreover, we observed a statistically significant increase in strength endurance. However, not all indicators reached normal values by the end of the research. The patients’ quality of life improved due to better physical functioning, general health and vitality as well as lower pain intensity. However, we observed no progress in role functioning due to the emotional state. Evaluation according to the Harris Hip Score showed that before the operation 78.6 % of the patients had unsatisfactory joint function, while during the late rehabilitation period, only 20.9 %, which indicates the treatmentʼs effectiveness. For citation: Ishekova N.I., Ishekov A.N., Goryannaya N.A. Dynamics of the Functional State of the Hip Joint and Quality of Life in Patients After Hip Replacement (During Rehabilitation). Journal of Medical and Biological Research, 2021, vol. 9, no. 4, pp. 426–434. DOI: 10.37482/2687-1491-Z080

*Северный государственный медицинский университет (г. Архангельск) Цель исследования-определить динамику стабилометрических показателей у пациентов после тотального эндопротезирования тазобедренного сустава на втором этапе реабилитации. В исследовании участвовало 43 человека, из них 27 (62,8 %) женщин, 16 (37,2 %) мужчин. В 21 случае операция была проведена на левом тазобедренном суставе (48,8 %), а в 22 случаях (51,2 %)-на правом. Все пациенты дважды обследовались на стабилоплатформе ST-150 (Россия): при поступлении на второй этап реабилитации и после прохождения 14 дней реабилитации. Критериями исключения явились: двустороннее поражение тазобедренных суставов, нарушение вестибулярного аппарата, клинически значимая неврологическая патология, нарушение зрения. Исследование проводилось по общепринятой методике с закрытыми и открытыми глазами при установке стоп по принятому американскому стандарту. В процессе реабилитации на втором этапе с помощью компьютерной стабилометрии были проанализированы балансировочные параметры и показатели опорной симметрии у пациентов после тотального эндопротезирования тазобедренного сустава с учетом стороны поражения. Анализ результатов исследования до курса реабилитации показал смещение центра давления у большинства пациентов. К концу реабилитации доля лиц со стабильным балансом возросла с 30,2 до 39,5 % случаев, отмечалось уменьшение зрительного контроля положения тела за счет повышения проприоцептивного контроля, а также уменьшение влияния зрения на функцию равновесия (р < 0,002). Полученные данные доказали необходимость применения стабилометрии в комплексной коррекции имеющихся нарушений на втором этапе реабилитации у пациентов после эндопротезирования тазобедренного сустава.