S.G. Gurzhin1, V.I. Zhulev2, M.M. Lapkin3, E.M. Proshin4, A.V. Shulyakov5

1,2,4,5 Ryazan State Radio Engineering University named after V.F. Utkin (Ryazan, Russia)
3 Ryazan State Medical University named after I.P. Pavlov (Ryazan, Russia)

To date, the available diagnostic tools of the Multimag complex allow assessing the functional state of the body using the method of analyzing the patient's heart rate variability (HRV), based on the recorded pulse wave signal in real time and calculating statistical and other indicators.

However, a limitation of the wider clinical application of the HRV method is the fact that the assessment of the functional state of the body is done on the basis of indicators of only one of its characteristics. In fact, the current state of the organism is provided by the dynamic interaction of several systemic organizations and depends on their activation resources.

The phenomenon of cardio-respiratory synchronism (CRS) is known, in which the level of cardio-respiratory relationships integrally reflects the systemic vegetative changes that occur in the human body under various external influences, and the violation of the synchronization of biorhythms reflects the developing tension (stress). With the help of SDS, it is possible to integrally assess the adaptive capabilities of the human body in almost any of its functional states and diseases.

The aim of the work is to confirm the possibility of implementing a medical diagnostic system with cardio-respiratory monitoring of the patient in complex chronomagnetic therapy and to quickly assess the level of the patient's stress state during a magnetic therapy session.

A method and implementation of a system for the simultaneous registration of the respiratory curve and the curve enveloping the dynamic series of cardio intervals during magnetic therapy, as well as the calculation of indicators of the degree of synchronization of these physiological processes are proposed.

The hardware of the system is a personal computer, a photometric pulse sensor and an ultrasonic respiration sensor, the signals from which are recorded, processed, their informative parameters are measured and diagnostic indicators are calculated using virtual instrument programs in the LabVIEW graphical programming environment.

Experimental tests of the system were carried out, the results of which confirmed its performance for cardio-respiratory monitoring of the patient's physiological processes as part of the Multimag complex, a high level of automation, efficiency and high accuracy of calculating diagnostic indicators.

The system will make it possible to quantitatively and objectively assess the patient's stress level by the cross-correlation relationship between the respiratory curve and the curve that envelops the dynamic series of cardio intervals. At the same time, the doctor will be able to timely give a qualitative and objective assessment of the current functional state of the patient and monitor the effectiveness of the treatment process.

Gurzhin S.G., Zhulev V.I., Lapkin M.M., Proshin E.M., Shulyakov A.V. Cardiorespiratory monitoring of the patient in complex chronomagnetic therapy. Biomedicine Radioengineering. 2022. V. 25. № 4. Р. 6-15. DOI: https://doi.org/10.18127/j15604136-202204-01 (In Russian)

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