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On the relationship between the work strain and the functional body state of surgeons at the emergency hospital

On the relationship between the work strain and the functional body state of surgeons at the emergency hospital

ISSN 2223-6775 Ukrainian journal of occupational health Vol.18, No 1, 2022


https://doi.org/10.33573/ujoh2022.01.029

On the relationship between the work strain and the functional body state of surgeons at the emergency hospital

Bobko N.A., Dovgopola S.P.
State Institution "Kundiiev Institute of Occupational Health of the National Academy of Medical Sciences of Ukraine"


 Full article (PDF), ENG

Introduction. The development of work strain is considered as “increasing in the intensity of physiological processes that ensure occupational activity” (A. O. Navakatikyan). The functional body state is understood as an integral complex of the available characteristics of those functions and qualities of a person that directly or indirectly determine the performance of an activity (V. I. Medvedev). The better the initial functional body state of a person, the more the intensity of his/her physiological processes can increase to perform the required activity. And the higher the requirements of the activity being performed, the sooner the resource of its physiological maintenance is being exhausted.

The purpose of the study was to reveal the relationship between the work strain of emergency hospital surgeons and their initial functional body state and its changes while performing the professional activities.

Materials and research methods. 62 surgeons aged 24-62 (M±m: 40.4±1.3) were examined using computer objective and subjective psychological tests (questionnaires). The mental and physical work strain of surgeons was studied. The initial functional body state was defined as the quality of night sleep before the start of the work shift. The functional body state during work process was determined in the categories of workability, fatigue, drowsiness, anxiety, stress, performance parameters of mental activity tests. The data were processed at the level of statistical significance p<0.05.

Results. A linear negative correlation was found between the quality of night sleep on the eve of a duty and the feeling of physical (p<0.012) or mental work strain (p<0.053). The growth in work strain was accompanied by a decrease in workability, an increase in fatigue, stress, anxiety and its structural elements; to a greater extent - the growth of physical strain than mental (p<0.006). The frequency of appearance of additional colors in the second position of Luscher's choice increased with an increase in mental (p<0.05) or physical (p<0.01) strain, primary colors - in the third position of choice with an increase in mental strain (p<0.01). A parabolic dependence of the efficiency of performing objective cognitive tests on the level of mental strain was revealed, with the least effective values at "below average" strain, when the worst parameters of memory and attention were observed, the assessment of time intervals (2-5 s) was most accelerated, the accuracy of assessment of 3-second intervals worsened. Under "below average" physical strain, the accuracy of assessment of 3-second intervals worsened. Under "below average" mental or physical strain, the maximum number of involuntary changes in the direction of rotation of the figure was observed in the Nobuyuki Kayahara test, indicating changes in the dominant hemisphere from the right to the left and vice versa.

Conclusions. The better the initial functional body state (quality of night sleep), the less work strain was felt. With the growth in work strain, the feeling of fatigue, drowsiness, stress, anxiety increased and workability - decreased, more pronounced - with an increase in physical strain (p<0.006). Under the growth in strain, one's own personal needs were relegated to the background, while a normal picture of the vision of the whole situation was kept more and more effectively. The increase in work strain was accompanied by parabolic changes in basic functions (p<0.05) - with a violation of the principle of dominance of one of the hemispheres in the functioning of the brain and an instability increase in the assessment of time intervals at "below average" strain, which was accompanied by a deterioration in memory and attention with an increase in mental work strain.

Key words: mental strain, physical strain, workability, fatigue, drowsiness, anxiety, stress, short-term memory, attention, time perception, sleep.

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