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1
Bodo, Michael, Ryan Sheppard, Aaron Hall, Martin Baruch, Melissa Laird, Shravalya Tirumala, and Richard Mahon. "Correlation of rheoencephalography and laser Doppler flow: a rat study." Journal of Electrical Bioimpedance 7, no. 1 (August 8, 2019): 55–58. http://dx.doi.org/10.5617/jeb.2985.
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Abstract Measuring brain electrical impedance (rheoencephalography) is a potential technique for noninvasive, continuous neuro-monitoring of cerebral blood flow autoregulation in humans. In the present rat study, we compared changes in cerebral blood flow autoregulation during CO2 inhalation measured by rheoencephalography to changes measured by laser Doppler flowmetry, an invasive continuous monitoring modality. Our hypothesis was that both modalities would reflect cerebral blood flow autoregulation. Male Sprague-Dawley rats (n=28; 28 control and 82 CO2 challenges) were measured under anesthesia. The surgical preparation involved implantation of intracerebral REG electrodes and an LDF probe into the brain. Analog waveforms were stored in a computer. CO2 inhalation caused transient, simultaneous increases in the signals of both laser Doppler flow (171.99 ± 46.68 %) and rheoencephalography (329.88 ± 175.50%). These results showed a correlation between the two measured modalities; the area under the receiver operating characteristic curve was 0.8394. The similar results obtained by measurements made with laser Doppler flowmetry and rheoencephalography indicate that rheo-encephalography, like laser Doppler flowmetry, reflects cerebral blood flow autoregulation. Rheoencephalography therefore shows potential for use as a continuous neuro-monitoring technique.
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Bodo, Michael. "Studies in Rheoencephalography (REG)." Journal of Electrical Bioimpedance 1, no. 1 (July 23, 2019): 18–40. http://dx.doi.org/10.5617/jeb.109.
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Abstract This article presents an overview of rheoencephalography (REG) – electrical impedance measurements of the brain – and summarizes past and ongoing research to develop medical applications of REG for neuro-critical care and for primary prevention of stroke and cardiovascular disease. The availability of advanced electronics and computation has opened up the potential for use of REG technology as a noninvasive, continuous and inexpensive brain monitor for military and civilian applications. The clinical background information presented here introduces physiological and clinical environments where REG has potential for use in research and clinical settings. REG studies over the past three decades have involved in vitro and in vivo groups (animal and human), including more than 1500 measurements and related electronic and computational results and practical applications. In vitro studies helped researchers understand the flow/volume relationship between Doppler ultrasound and electrical impedance signals and supported development of REG data processing methods. In animal studies, REG was used to monitor the lower limit of cerebral blood flow (CBF) autoregulation (AR) using a newly developed algorithm. These animal studies also confirmed correlations between REG and measurements of carotid flow (CF) and intracranial pressure (ICP). Human studies confirmed the applicability of REG for detecting cerebrovascular alteration, demonstrating the usefulness of REG in the field of stroke/cardio-vascular disease prevention. In these studies, REG was compared to known stroke risk factors and to results obtained using carotid ultrasound measurements. An intelligent REG system (Cerberus) has been developed for primary stroke prevention. In these studies, the biologically relevant variables of the REG signal were pulse amplitude (minimum – maximum distance) and duration of the anacrotic (rising) portion of the REG pulse wave. The principal limitation of REG for clinical application is the lack of pathological and physiological correlations. The studies presented here have initiated such inquiries, but many clinical questions about the pathophysiological background of REG remain unanswered. These results demonstrate that REG development is a multidisciplinary subject with relevance for medicine (vascular neurology and neurosurgery intensive care); electronic engineering; mathematics, and computer science (data processing). It is hoped that information presented in this article will provide assistance to those involved in REG research, particularly in development and clinical applications.
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Bodo, M., F. J. Pearce, and R. A. Armonda. "Cerebrovascular reactivity: rat studies in rheoencephalography." Physiological Measurement 25, no. 6 (September 8, 2004): 1371–84. http://dx.doi.org/10.1088/0967-3334/25/6/003.
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Brady, K. M., J. O. Mytar, K. K. Kibler, R. B. Easley, R. C. Koehler, M. Czosnyka, P. Smielewski, et al. "Monitoring cerebrovascular pressure reactivity with rheoencephalography." Journal of Physics: Conference Series 224 (April 1, 2010): 012089. http://dx.doi.org/10.1088/1742-6596/224/1/012089.
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Bodo, Michael, Gyorgy Thuroczy, Mike Bodo, Tamas Nebella, Gyula Panczel, Kornel Sipos, Peter Bonoczk, Zoltan Nagy, and Andras Javor. "Use of rheoencephalography for primary stroke prevention." Journal of Cerebral Blood Flow & Metabolism 25, no. 1_suppl (August 2005): S551. http://dx.doi.org/10.1038/sj.jcbfm.9591524.0551.
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Hoang Tin, Nguyen, Tran Thai Thanh Tam, and Phung Minh Thu. "The noninvasive neuromonitoring in medicine: Rheoencephalography (REG)." American Journal of Medical Sciences and Medicine 11, no. 3 (August 17, 2023): 67–73. http://dx.doi.org/10.12691/ajmsm-11-3-1.
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Szabo, Sandor, Zsolt Totka, Jozsef Nagy-Bozsoky, Istvan Pinter, Mihaly Bagany, and Michael Bodo. "Rheoencephalography: A non-invasive method for neuromonitoring." Journal of Electrical Bioimpedance 15, no. 1 (January 1, 2024): 10–25. http://dx.doi.org/10.2478/joeb-2024-0003.
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Abstract In neurocritical care, the gold standard method is intracranial pressure (ICP) monitoring for the patient's lifesaving. Since it is an invasive method, it is desirable to use an alternative, noninvasive technique. The computerized real-time invasive cerebral blood flow (CBF) autoregulation (AR) monitoring calculates the status of CBF AR, called the pressure reactivity index (PRx). Studies documented that the electrical impedance of the head (Rheoencephalography – REG) can detect the status of CBF AR (REGx) and ICP noninvasively. We aimed to test REG to reflect ICP and CBF AR. For nineteen healthy subjects we recorded bipolar bifrontal and bitemporal REG derivations and arm bioimpedance pulses with a 200 Hz sampling rate. The challenges were a 30-second breath-holding and head-down-tilt (HDT – Trendelenburg) position. Data were stored and processed offline. REG pulse wave morphology and REGx were calculated. The most relevant finding was the significant morphological change of the REG pulse waveform (2nd peak increase) during the HDT position. Breath-holding caused REG amplitude increase, but it was not significant. REGx in male and female group averages have similar trends during HDT by indicating the active status of CBF AR. The morphological change of REG pulse wave during HDT position was identical to ICP waveform change during increased ICP, reflecting decreased intracranial compliance. A correlation study between ICP and REG was initiated in neurocritical care patients. The noninvasive REG monitoring would also be useful in space research as well as in military medicine during the transport of wounded service members as well as for fighter pilots to indicate the loss of CBF and consciousness.
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Sarafyniuk, L. A., and D. O. Merkulova. "Peculiarities of relationships between rheoencephalographic and anthropo-metric indicators of mesomorphic volleyball players somatotype." Reports of Vinnytsia National Medical University 26, no. 4 (December 24, 2022): 557–61. http://dx.doi.org/10.31393/reports-vnmedical-2022-26(4)-06.
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Annotation. For early detection of signs of fatigue and overtraining at high altitude of professional sportsmen, quality is of great practical importance monitoring of the state of the cardiovascular system, in particular indicators of cerebral hemodynamics in combination with individual constitutional features of the body. The purpose of the study was determination of features of relationships between rheoencephalographic indicators and parameters of the external body structure of volleyball players youth of a high level of skill, which belonged to the mesomorphic constitutional type. They conducted a comprehensive study of 70 young men (aged from 17 to 21 years old), who played volleyball for at least 3 years and achieved a high level skill level (small sports categories from the first adult to masters of sports). After somatotyping according to the Heath-Carter (1990) found mesomorphic somatotype in 36 volleyball players. Rheoencephalography was performed on a computer diagnostic complex according to by the method of Ronkin and Ivanov (1997), anthropometry - by the method of V. V. Bunak (1941), correlation analysis - according to Spearman's method. It was established that in cerebral indicators of mesomorphic somatotype volleyball players hemodynamics had individual anthropo-somatotypological parameters reliable relationships, most of which were directly proportional to mean strength. Temporal correlations had the greatest strength and number of statistically significant correlations rheoencephalographic indicators, in particular the time of the ascending part rheoencephalograms. Most often with indicators of cerebral hemodynamics total body dimensions (length and surface area) were reliably correlated bodies, height of anthropometric points, anterior-posterior and transverse diameters body, girth measurements of chest and limb segments, separate craniometric dimensions). The study of correlations is the basis determining the harmony of physical development of athletes and further mathematical modeling to determine individual dues rheoencephalographic indicators.
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Izvarina, Olga A., Tatiana O. Nikolaeva, Viktor V. Anikin, Natalia S. Beganskaya, and Nikolai I. Gromnatskiy. "Experience of studying cerebral disorders in women in menopause." Человек и его здоровье 24, no. 4 (2021): 9–16. http://dx.doi.org/10.21626/vestnik/2021-4/02.
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The incidence of arterial hypertension (AH) in women increases significantly with the onset of menopause. Age-related hypoestrogenism leads both to an increase in blood pressure (BP) and to a violation of its daily profile. It can lead to impaired cerebral blood flow. Objective: to study the features of cerebral disorders in women in the perimenopausal period with and without hyper-tension using rheoencephalography, as well as their relationship with some indicators of the daily blood pressure profile. Materials and methods. A clinical and instrumental examination of 190 women in the climacteric period (141 people with hypertension and 49 without hypertension) was carried out, who were divided into groups depending on the presence of hypertension and the period of perimenopause. Instrumental research included 24-hour blood pressure monitoring and rheoencephalography. Results. The onset of menopause was accompanied by an increase in the degree of arterial hypertension, with an in-crease mainly in systolic blood pressure. Changes in its daily profile was also noted, especially insufficient or excessive de-crease at night, as well as an increased speed and magnitude of the morning rise both in women with hypertension and without it. The revealed disorders were more pronounced in postmenopausal women and were accompanied by changes in cerebral circulation, which can lead to ischemic and hemorrhagic cerebral complications. Conclusion. Comparison of indicators of rheoencephalography and daily monitoring of blood pressure in menopausal women revealed changes in cerebral circulation, most pronounced in the presence of arterial hypertension and after meno-pause.
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Bodó, Mihály. "A noninvasive, continuous brain monitoring method: rheoencephalography (REG)." DRC Sustainable Future: Journal of Environment, Agriculture, and Energy 1, no. 2 (October 2, 2020): 103–19. http://dx.doi.org/10.37281/1.2.3.
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This paper deals with the sustainability under anoxic conditions of human beings, both when healthy, and diseased. As our attention is focused these days on the environment, sustainability, and green energy, a similar effort is being made in neuromonitoring to switch from invasive to noninvasive monitoring methods. Keys to these changes are computerization and shrinking size of electronic hardware. Computerization is going on in all areas of biomedical engineering, both in research and in clinical fields of medicine. In neurology, brain imaging is the most characteristic change in recent decades. These modalities of imaging (MRI, CT, PET scan, etc.) are predominantly utilized for localizing brain pathology. Brain imaging offers great spatial resolution, but poor time resolution. Therefore, for continuous monitoring, neurocritical care departments require an additional tool with good time resolution. There are invasive and noninvasive neuromonitoring methods. The standard method to monitor intracranial pressure (ICP) is an invasive method. Computerization allows for calculating the cerebral blood flow autoregulation (CBF AR) index (pressure reactivity index - PRx) from ICP and systemic arterial pressure (SAP) in real time, continuously, but invasively. The new development, discussed in this paper, is to calculate this index noninvasively by using rheoencephalography (REG), called REGx. We present the road to this invention and summarize multifold REG related results, such as using REG for primary stroke prevention screening, comparison incidence of arteriosclerotic risk factors, various studies by using CBF manipulations, and correlations with other neuromonitoring methods, and validation with in vitro and in vivo methods. REG by using different algorithms allow for real time calculation of autoregulated blood flow. This paper presents results of validation of CBF algorithms as an effective, noninvasive method. The author’s intent is to supply sufficient physiological background information. This review covers the author’s research efforts over several decades; it pertains multiple studies and has an updated addition to human sustainability by considering that Covid-19 is increasing stroke and cardiovascular disease (CVD) morbidity and mortality.
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Meghdadi, Amir H., Djordje Popovic, Gregory Rupp, Stephanie Smith, Chris Berka, and Ajay Verma. "Transcranial Impedance Changes during Sleep: A Rheoencephalography Study." IEEE Journal of Translational Engineering in Health and Medicine 7 (2019): 1–7. http://dx.doi.org/10.1109/jtehm.2019.2898193.
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Moskalenko, Yu E., and Ju V. Andreeva. "Rheoencephalography: Past Popularity, Obvilion at Present and Optimistic Furure." International Journal of Advances in Life Science and Technology 2, no. 1 (2015): 1–15. http://dx.doi.org/10.18488/journal.72/2015.2.1/72.1.1.15.
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Biletskiy, O. V., and S. V. Kursov. "The possibility of studying cerebral blood flow with rheoencephalography." EMERGENCY MEDICINE, no. 1.88 (March 22, 2018): 108–13. http://dx.doi.org/10.22141/2224-0586.1.88.2018.124976.
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Bodo, M., F. Pearce, A. Garcia, S. Van Albert, T. Settle, J. Szebeni, L. Baranyi, J. Hartings, and R. Armonda. "In vivo cerebral blood flow autoregulation studies using rheoencephalography." Journal of Physics: Conference Series 224 (April 1, 2010): 012088. http://dx.doi.org/10.1088/1742-6596/224/1/012088.
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Nazarova, Janna, and L. U. Zakirova. "FEATURES OF VENOUS CEREBRAL DYSFUNCTION IN PATIENTS WITH COPD ACCORDING TO RHEOENCEPHALOGRAPHY." Oriental Journal of Medicine and Pharmacology 03, no. 02 (March 1, 2023): 71–76. http://dx.doi.org/10.37547/supsci-ojmp-03-02-08.
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This article discusses the features of venous cerebral dysfunction in patients with COPD according to rheoencephalography. It has been established that the main rheographic indicators characterizing pulse blood filling, tone and resistance of the vascular wall, the state of venous outflow and vascular resistance correlate well with the data obtained from ultrasound and angiographic studies, which increases the informative value of the REG method.
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Азатян Т.Ю. "АНАЛИЗ РЕОЭНЦЕФАЛОГРАФИЧЕСКОГО ИССЛЕДОВАНИЯ МЕЖПОЛУШАРНОЙ АСИММЕТРИИ МОЗГОВОГО КРОВОТОКА У ЗДОРОВЫХ И УМСТВЕННО ОТСТАЛЫХ ДЕТЕЙ 8-11 ЛЕТ." MEDICINE, SCIENCE AND EDUCATION, no. 36 (November 2023): 39–44. http://dx.doi.org/10.56936/18291775-2023.36-39.
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The features of functional organization of hemodynamic processes in brain basins of healthy children and children with mild mental retardation, depending on the nature of asymmetry and gradient of cerebral blood flow, were studied. The study involved 131 children aged from 8 to 11 years. Of them, 73 were healthy with normal physical and mental development, and 58 children - with mild mental retardation. The study was conducted to determine what kind of sports and physical activity allow children with mental retardation to engage in activities. To study the functional interhemispheric asymmetry of cerebral blood flow in the studied groups of children, the technique of rheoencephalography was used. The article presents the results of empirical studies of rheoencephalography parameters of the brain among healthy children and those with mild mental retardation. The parameters of cerebral blood circulation of healthy children and children with mental retardation aged 8-11 years, reflecting the state of different parts of the cerebral vascular system, were studied. We also analyzed and compared age-related changes in the functional organization of hemodynamic processes in healthy children aged 8-11 years and in children diagnosed with mental retardation.
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Bodo, Michael, Richard Mahon, Alex Razumovsky, Efim Kouperberg, Michael Crimmins, Rocco Armonda, and Martin Baruch. "Comparison of cerebrovascular reactivity tests: a pilot human study." Journal of Electrical Bioimpedance 8, no. 1 (August 8, 2019): 25–33. http://dx.doi.org/10.5617/jeb.3939.
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Abstract In neurosurgery intensive care units, cerebrovascular reactivity tests for neuromonitoring are used to evaluate the status of cerebral blood flow autoregulation; lack of autoregulation indicates a poor patient outcome. The goal of neuromonitoring is to prevent secondary injuries following a primary central nervous system injury, when the brain is vulnerable to further compromise due to hypoxia, ischemia and disturbances in cerebral blood flow and intracranial pressure. Ideally, neuromonitoring would be noninvasive and continuous. This study compares cerebrovascular reactivity monitored by rheoencephalography, a noninvasive continuous monitoring modality, to cerebrovascular reactivity measured by currently used neuromonitoring modalities: transcranial Doppler, near infrared spectroscopy and laser Doppler flowmetry. Fourteen healthy volunteer subjects were measured. The tests used for comparison of cerebrovascular reactivity were breath-holding, hyperventilation, CO2 inhalation, the Valsalva maneuver, and the Trendelenburg and reverse Trendelenburg positions. Data for all modalities measured were recorded by computers and processed off line. All measured modalities reflected cerebrovascular reactivity with variabilities. Breath-holding, CO2 inhalation, and the Valsalva maneuver caused CO2 increase and consequent brain vasodilatation; hyperventilation caused CO2 decrease and brain vasoconstriction. The Trendelenburg and reverse Trendelenburg positions caused extracranial blood volume changes, which masked intracranial cerebrovascular reactivity. The hyperventilation test proved ineffective for measuring cerebrovascular reactivity with rheoencephalography due to respiratory artifacts. Some discrepancies among the
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Brazovskii, Konstantin S., Jacov S. Pekker, and Oleg S. Umanskii. "Modelling the Ability of Rheoencephalography to Measure Cerebral Blood Flow." Journal of Electrical Bioimpedance 5, no. 1 (August 8, 2019): 110–13. http://dx.doi.org/10.5617/jeb.962.
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Abstract Despite the long history of rheoencephalography (REG), some important aspects of the method are still debatable. Bioimpedance measurements offer great potential benefit for study of the human brain, but the traditional four or six electrode method suffers from potential misinterpretations and lack of accuracy. The objective of this paper is to study the possible mechanism of REG formation by means of numerical modelling using a realistic finite element model of the human head. It is shown that the cardiac related variations in electrical resistivity of the scalp contributes more than 60% to the REG amplitude, whereas the brain and cerebrospinal fluid are mutually compensated by each over.
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Kuleshov, A. V., L. M. Bulat, Y. A. Medrazhevskaya, S. L. Malyk, and I. V. Chigir. "Features of rheoencephalography in children with primary mitral valve prolapse." Reports of Vinnytsia National Medical University 23, no. 4 (December 30, 2019): 632–37. http://dx.doi.org/10.31393/reports-vnmedical-2019-23(4)-13.
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Annotation. Mitral valve prolapse (MVP), as a manifestation of connective tissue dysplasia, is of great interest in the field of medicine. It occupies an important place in the structure of diseases of the cardiovascular system, which is mainly due to its high incidence and possible complications. MVP is detected in almost 2–3% of the population. In addition, this pathology with a genetic predisposition is a manifestation of a connective tissue defect and is rare in newborns and at an early age, which characterizes it as a progressive disease. At the moment, the features of cerebral hemodynamics in children with MVP are not well understood. The aim of our study was to study cerebral hemodynamics in children with primary mitral valve prolapse using quantitative indicators of rheoencephalography (REG). The study included patients with primary MVP. Under our supervision, there were 106 children aged 13 to 17 years. The control group included 23 healthy children at the same age. All children underwent a REG with quantitative indicators. In children with MVP, there is a variability in the results of REG in the cerebral hemispheres. Vascular elasticity is significantly reduced due to anacrot time increase (p<0.001), which, in fact, is characteristic of the hypertonic type of blood flow (57.5%). It can be argued that in children there is a hypovolemic type of blood flow in the form of a decrease in the rheographic index relative to the control group (p<0.05). There is a tendency to vascular tone tension of all calibers according to the absence of statistically significant deviations of the corresponding indicators (dictrotic index and the ratio of the duration of the ascending phase to the duration of the entire pulse wave). The same picture is observed with venous blood flow, according to the values of the dystolic index in the carotid artery basin. In the basin of the vertebral artery there is a tendency to increase the tone of small vessels and venous vessels. Thus, in children with mitral valve prolapse, cerebral blood flow changes in the form of hypovolemia in the carotid artery basin and normovolemia in the vertebral artery basin according to REG parameters; in this group of children with MVP, there is a tendency to tension in the tone of blood vessels of all calibers according to the absence of statistically significant deviations of the corresponding indicators (dictrotic index and the ratio of the duration of the ascending phase to the duration of the entire pulse wave). Also, patients with MVP should be constantly monitored by narrow specialists (cardiologists, neurologists) for timely and adequate recovery.
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Hatsell, C. P. "A quasi-power theorem for bulk conductors: comments on rheoencephalography." IEEE Transactions on Biomedical Engineering 38, no. 7 (July 1991): 665–69. http://dx.doi.org/10.1109/10.83566.
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Sokolova, I. V. "Automated diagnostic system for evaluating cerebrovascular function based on rheoencephalography." Biomedical Engineering 20, no. 2 (1986): 39–42. http://dx.doi.org/10.1007/bf00556790.
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Nguyen, Tin Hoang, Kien Trung Nguyen, Long Duc Tran, An Thi Thuy Le, Thu Minh Phung, Truc Thi Ngoc Banh, Trang Thi Vo, and Michael Bodo. "Characteristics of Rheoencephalography and some associated factors on menopausal women." Journal of Electrical Bioimpedance 13, no. 1 (January 1, 2022): 78–87. http://dx.doi.org/10.2478/joeb-2022-0012.
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Abstract The significant drop in estrogen levels during menopause increases the cardiovascular risks, one of which is cerebrovascular atherosclerosis. Research on rheoencephalography (REG) parameters for the early diagnosis of cerebrovascular atherosclerotic lesions is of great interest to scientists because of its ease of implementation, low cost, and non-invasiveness. The objectives of study are to evaluate the vascular tone, cerebral circulation flow in each hemisphere of the brain of menopausal women, and some associated factors through waveform characteristics and parameters in REG. A controlled cross-sectional descriptive study was conducted on a group of patients including 80 menopausal women and a control group of 46 menstruating women. All patients were measured REG in the frontal-occipital leads by VasoScreen 5000 impedance REG meter. In menopausal women, the percentage of sharp waves, the percentage of clear side waves, and the average REG were all lower than in the control group (p<0.01). The mean conduction time and mean slope ratio was lower than the control group (p<0.001). The mean peak time was higher than the control group (p<0.01). The mean elasticity index (alpha/T) was higher than the control group (p<0.001). Menopausal women have increased vascular tone, the highest in the group of women 50-60 years old, menopause <5 years, having a habit of eating red meat; and decreased blood flow intensity, the highest in the group of women <50 years old. However, the difference was statistically significant only in the left hemisphere (p<0.05). Vascular hypertonia in menopausal women with central obesity was higher than in the non-obese group in both hemispheres (p<0.05). In conclusion, menopausal women had atherosclerosis in both hemispheres of the brain, which was clearly shown in the rate of increased vascular tone. Central obesity may increase the risk of vascular hypertonia 3.75 times in the right and 5.44 times in the left hemisphere.
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Shidlovskaya, Tetiana A., Tamara V. Shidlovskaya, Nikolay S. Kozak, Kateryna V. Ovsyanik, and Lyubov G. Petruk. "Indicators of rheoencephalography in recurrent acutraumatic lesions in real combat conditions." OTORHINOLARYNGOLOGY, No1-2(5) 2022 (May 11, 2022): 4–10. http://dx.doi.org/10.37219/2528-8253-2022-1-04.
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Topicality: Recurrent acute trauma is common in patients who have received acutrauma in the combat zone. In such patients it is advisable to diagnose cerebral hemodynamic disorders for timely targeted medical care. Objectives of the study: The purpose of the work is to assess the quantitative and qualitative indicators of rheoencephalography in servicemen who received repeated acute trauma in real combat conditions. Materials and methods: We analysed the rheoencephalography of 52 patients with recurrent acute trauma and 15 healthy normal hearing subjects. Results: In the qualitative assessment of the rheograms of the examined patients, we found signs of cerebral circulatory disorders in both carotid (FM) and vertebrobasilar (OM) systems. In 28,3 % of the surveyed OOS fighters, we observed an increase in the tone of cerebral vessels with symptoms of angiospasm. Difficulty with venous outflow occurred in 72,1 % of cases in the carotid system and in 87,6 % - in the vertebrobasilar. Among the studied patients, we also often recorded a decrease in cerebral vascular tone (25,7 %) and cases of atonic curve (24,1 %). There was a significant proportion of patients with unstable vascular tone with a tendency to increase it 47,4 % or decrease 27,7 % in both cerebral circulatory systems. With regard to pulse blood supply, in patients with acutrauma were recorded (58,2 %) cases of its reduction in the carotid system and (89,7 %) in the vertebrobasilar basin. In the vertebrobasilar system, the asymmetry of REG curves (12,1 %) was also observed in real combat conditions. Analysis of quantitative indicators of REG in the carotid and vertebrobasilar systems in the subjects compared with the control group (K) revealed the following. In the examined patients there were changes in cerebral vascular tone and difficulty in venous outflow, as well as a decrease in pulse blood supply, as evidenced by significant changes in α, dichroic (DKI), diastolic (DSI) and rheographic (RI) indices of the REG curve. Thus, in the vertebrobasilar system, the value of Pi, which characterizes the pulse blood supply, was 0,57±0,04 (P<0,01) (at a rate of 1,19±0,03), and DKI was 59,63±1,18% (P<0,01) (at a rate of 51,2±1,4%). Thus, in patients with recurrent acute trauma there are severe disorders of cerebral circulation, especially in the vertebrobasilar basin. Conclusions: 1. According to rheoencephalography, fighters who received repeated acute trauma in the area of environmental protection have severe cerebrovascular disorders, with venous outflow difficulties, decreased pulse blood flow, tendency to decrease and unstable tone of cerebral vessels predominate. 2. Significant (P<0,05) deviations from the norm in the indicators of DKI, DSI and Ri, especially in the vertebrobasilar basin, take place in the examined fighters with repeated acute trauma. This indicates a pronounced violation of cerebral circulation, venous outflow and decreased pulse blood supply during repeated combat acutrauma. 3. In case of repeated combat acutrauma, there are pronounced extraural disorders of the cerebral circulation, which need to be taken into account when providing medical care to such patients.
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Shydlovska, T. A., T. V. Shydlovska, M. S. Kozak, K. V. Ovsyanik, O. P. Yavorovsky, R. P. Brukhno, and M. A. Boychuk. "Comparative analysis of rheoencephalography in workers of coal and food industries." Ukrainian Journal of Occupational Health 2016, no. 3 (September 30, 2016): 49–55. http://dx.doi.org/10.33573/ujoh2016.03.049.
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Pérez, Juan J., Enrique Guijarro, and Juan A. Barcia. "Influence of the scalp thickness on the intracranial contribution to rheoencephalography." Physics in Medicine and Biology 49, no. 18 (September 4, 2004): 4383–94. http://dx.doi.org/10.1088/0031-9155/49/18/013.
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Bodo, Michael, Leslie D. Montgomery, Frederick J. Pearce, and Rocco Armonda. "Measurement of cerebral blood flow autoregulation with rheoencephalography: a comparative pig study." Journal of Electrical Bioimpedance 9, no. 1 (December 31, 2018): 123–32. http://dx.doi.org/10.2478/joeb-2018-0017.
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Abstract Neuromonitoring is performed to prevent further (secondary) brain damage by detecting low brain blood flow following a head injury, stroke or neurosurgery. This comparative neuromonitoring study is part of an ongoing investigation of brain bioimpedance (rheoencephalography-REG) as a measuring modality for use in both civilian and military medical settings, such as patient transport, emergency care and neurosurgery intensive care. In a previous animal study, we validated that REG detects cerebral blood flow autoregulation (CBF AR), the body’s physiological mechanism that protects the brain from adverse effects of low brain blood flow (hypoxia/ischemia). In the current descriptive pig study, the primary goal was to compare measurements of CBF AR made with REG to measurements made with other neuromonitoring modalities: laser Doppler flow (LDF); intracranial pressure (ICP); absolute CBF; carotid flow (CF); and systemic arterial pressure (SAP). Challenges administered to anesthetized pigs were severe induced hemorrhage (bleeding) and resuscitation; CO2 inhalation; and positive end expiratory pressure (PEEP). Data were stored on a computer and processed offline. After hemorrhage, the loss of CBF AR was detected by REG, ICP, and CF, all of which passively followed systemic arterial SAP after bleeding. Loss of CBF AR was the earliest indicator of low brain blood flow: loss of CBF AR occurred before a decrease in cardiac output, which is the cardiovascular response to hemorrhage. A secondary goal of this study was to validate the usefulness of new automated data processing software developed to detect the status of CBF AR. Both the new automated software and the traditional (observational) evaluation indicated the status of CBF AR. REG indicates the earliest breakdown of CBF AR; cessation of EEG for 2 seconds and respiration would be used as additional indicators of loss of CBF AR. The clinical significance of this animal study is that REG shows potential for use as a noninvasive, continuous and non-operator dependent neuromonitor of CBF AR in both civilian and military medical settings. Human validation studies of neuromonitoring with REG are currently in progress.
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Traczewski, W., M. Moskala, D. Kruk, I. Gościński, D. Szwabowska, J. Polak, and K. Wielgosz. "The Role of Computerized Rheoencephalography in the Assessment of Normal Pressure Hydrocephalus." Journal of Neurotrauma 22, no. 7 (July 2005): 836–43. http://dx.doi.org/10.1089/neu.2005.22.836.
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YAN, K., Y. SUN, L. YUAN, S. LI, L. ZHANG, J. CHEN, Q. ZHOU, and C. ZHANG. "F194. Experimental studies on rheoencephalography of rabbit, white mouse and mongolian gerbil." Biorheology 32, no. 2-3 (March 1995): 332. http://dx.doi.org/10.1016/0006-355x(95)92306-u.
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YAN, X., Y. SUN, S. LI, L. YUAN, J. CHEN, L. ZHANG, W. SUN, and X. REN. "F195. The application of computer rheoencephalography (CREG) to planned simple carotid resection." Biorheology 32, no. 2-3 (March 1995): 332–33. http://dx.doi.org/10.1016/0006-355x(95)92307-v.
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Aponchuk, Lyudmila, and Tatiana Shevchuk. "THE ANALYSIS OF INDICES OF CEREBRAL BLOOD CIRCULATION IN WOMEN-SMOKERS." EUREKA: Life Sciences 1 (January 31, 2017): 44–50. http://dx.doi.org/10.21303/2504-5695.2017.00287.
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The results of rheoencephalography of female smokers 17–21 years old and control group were studied and analyzed. The aim of this work was to explain and analyze physiological features of smoking effect on functional changes of regional hemodynamics in smoking women. The study of cerebral hemodynamics was carried out by the method of rheoencephalography (REG) – automated system of complex examination “Askold”, intended for automation of medical tasks processing with input of information in “online” regime (insertion of data directly from examined person). The recording of rheogram was carried out in front-mastoid branches that allowed register REG separately in both hemispheres of brain and determine the main amplitude-temporal characteristics of cerebral blood circulation and changes of vascular tone. Analyzing the main indices of regional hemodynamics in female smokers, the statistically lower values of time of rheowave delay (Ra) were noted. There was also revealed a decrease of volumetric cerebral blood circulation and increase of resistant arteries tone. There were fixed the moderate asymmetry (from 15 to 25 %) of blood filling in vertebral-basilar vascular basin (basin of spinal and internal carotid arteries) and the signs of complicated venous outflow in both hemispheres. Such changes of indices indicate the decrease of volumetric blood circulation of cerebral hemodynamics, striking volume of blood and increase of tone of distribution arteries that testify to the decrease of blood circulation in main vessels, and also smoking is a cause of hypoxia (oxygen deprivation) of cerebral cells as a result of decrease of blood inflow. In the women of control group all indices are within norm that testifies to the normal course of physiological processes in organism.
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Tymchenko, Andrii. "Cerebral circulation improvement method using boxing and orthodontic mouthguards." BULLETIN OF MEDICAL AND BIOLOGICAL RESEARCH 16, no. 2 (June 1, 2023): 39–50. http://dx.doi.org/10.61751/bmbr.2706-6290.2023.2.39.
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Due to the active hostilities in Ukraine, the rates of exacerbations of chronic diseases, trauma to the head and spinal column due to both gunshot wounds and increased force load on the musculoskeletal system have increased significantly. The issue of improving rehabilitation approaches is relevant due to the available statistics on cerebral blood supply pathologies. Given the need for affordable and effective methods of musculoskeletal rehabilitation, the study aims to investigate the effectiveness of orthodontic and boxing mouthguards on the state of cerebral blood vessels. Five patients with a history of contusion and post-traumatic stress disorder were studied at the Kyiv Regional Centre for Mental Health using a physical examination and rheoencephalography. The use of orthodontic and boxing mouthguards showed positive dynamics in the restoration of maxillofacial muscles, compensation of bite height and satisfactory blood supply to brain structures compared to the baseline data. The analysis of the encephalograms showed rheoencephalographic signs of improvement in cerebral circulation: a decrease in spasm of the arterial walls of cerebral vessels, compensation for blood supply deficit, improvement of blood circulation in the carotid basin and venous outflow in the deficit mode were detected. In the examined patients with injuries, pain syndrome and constant mechanical stress on the musculoskeletal system, a decrease in pain and improvement of muscle symmetry in the affected anatomical areas were noted while wearing orthodontic and boxing mouthguards. The obtained results can be implemented in the rehabilitation protocols for patients with concussion, brain concussion, and spinal and skull injuries. The availability and effectiveness of the proposed technique allow it to be used for patients with chronic diseases of the cardiovascular system, especially with complicated blood supply to brain structures
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Шидловская, Т. А., Н. С. Козак, Е. В. Овсяник, and Л. Г. Петрук. "Rheoencephalography Indices in the Dynamics of Treatment of Sensorineural Hearing Loss in Acutrauma." Оториноларингология. Восточная Европа, no. 2 (November 5, 2021): 175–84. http://dx.doi.org/10.34883/pi.2021.11.2.047.
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Введение. Акутравма оказывает влияние не только на слуховую, но и на сердечно-сосудистую и центральную нервную системы. Слуховой анализатор чрезвычайно чувствителен к сосудистым нарушениям. Цель. Исследование количественных и качественных показателей реоэнцефалографии (РЭГ) до и после лечения сенсоневральной тугоухости у военнослужащих, получивших акутравму в реальных боевых условиях. Материалы и методы. Обследовано 52 пациента с акутравмой и 15 здоровых человек с помощью компьютерного реографа фирмы «DX-системы». Проанализированы 119 реоэнцефалограмм. Результаты. До лечения нормальные показатели состояния мозгового кровообращения по данным РЭГ не регистрировались ни у одного пациента с акутравмой. Имеют место выраженные нарушения в состоянии мозгового кровообращения, особенно в вертебрально-базилярном бассейне. У бойцов отмечались: затруднение венозного оттока в 69,0% случаев в каротидной системе и в 87,0% - в вертебрально-базилярной, снижение тонуса мозговых сосудов (15,0%) и случаи атонической кривой (23,0%), неустойчивый сосудистый тонус со склонностью кего повышению (41,0%) или снижению (18,0%) в обеих системах мозгового кровообращения, снижение пульсового кровенаполнения в каротидной системе (51,0%) и в вертебрально-базилярной(77,0%), повышение тонуса мозговых сосудов с явлениями ангиоспазма у 16,0%, асимметрия (13,0%) в вертебрально-базилярной системе. В процессе проведенного нами лечения происходит улучшение церебральной гемодинамики, о чем свидетельствуют изменения качественных количественных показателей РЭГ. Так, например, в вертебрально-базилярной системе до лечения показатель Ри, характеризующий пульсовое кровенаполнение, был 0,66±0,04 (t=6,74; Р<0,01) при норме 1,19±0,03, а после лечения он равнялся 0,73±0,03 (t=6,41; Р<0,01) соответственно. Снизился процент регистрации неустойчивого сосудистого тонуса со склонностью к его снижению в каротидной системе (12,0%) и случаев атонической кривой (3,0%), снижения пульсового кровенаполнения в каротидной системе (33,0%), асимметрии РЭГ-кривых (3,0%) в обеих системах мозгового кровообращения. Выводы. По данным РЭГ у бойцов, получивших акутравму в боевых условиях, наиболее информативными показателями являются ДКИ, ДСИ и Ри, которые отражают: тенденцию к снижению - атонический либо нестойкий тонус мозговых сосудов, затруднение венозного оттока, снижение пульсового кровенаполнения соответственно. Среднестатистические значения таких показателей достоверно (Р<0,01) отличались от контроля. Introduction. Acutrauma affects not only the auditory, but also the cardiovascular and central nervous systems. The auditory analyzer is extremely sensitive to vascular disorders. Purpose. To study the quantitative and qualitative indicators of rheoencephalography (REG) before and after treatment for sensorineural hearing loss (SNT) in military personnel, who received acutrauma in real combat conditions. Materials and methods. 52 patients with acutrauma and 15 healthy people were examined using a computer rheograph of the “DX-system” company; 119 rheoencephalograms were analyzed. Results. Before treatment, the normal parameters of the state of cerebral circulation according to the REG data were not recorded in any patient with acutrauma. There are pronounced disorders in the state of cerebral circulation, especially in the vertebrobasilar basin. The fighters showed the following: difficulty in venous outflow in 69.0% of cases in the carotid system and in 87.0% of cases in the vertebrobasilar system; decreased tone of cerebral vessels (15.0%) and cases of atonic curve (23.0%); unstable vascular tone with the tendency to increase (41.0%) or decrease (18.0%) in both cerebral circulation systems; decrease of pulse volume in the carotid system (51.0%) and in the vertebrobasilar system (77.0%); increased tone of cerebral vessels with the symptoms of angiospasm in 16.0% of cases; asymmetry in the vertebrobasilar system (13.0%). In the course of our treatment, there is an improvement of cerebral hemodynamics, as evidenced by changes of the qualitative quantitative indicators of REG. So, for example, in the vertebrobasilar system before treatment, the Pp index, which characterizes the pulse blood filling, was 0.66±0.04 (t=6.74; P<0.01) with the norm of 1.19±0.03; after treatment, it was equal to 0.73±0.03 (t=6.41; P<0.01), respectively. The percentage of registration of unstable vascular tone decreased with the tendency to decrease in the carotid system (12.0%) and cases of the atonic curve (3.0%), decrease of pulse blood filling in the carotid system (33.0%), asymmetry of the REG curves (3.0%) in both cerebral circulation systems. Conclusions. Thus, according to the REG data, in the fighters who received acutrauma in combat conditions, the most informative indicators are DKI, DSI, and Ri, which reflect the following: the tendency to decrease - atonic or unstable tone of cerebral vessels, difficulty in venous outflow, decreased pulse blood filling, respectively. The average values of such indicators significantly (P<0.01) differed from the control.
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Pérez, J. J., E. Guijarro, and J. A. Barcia. "Quantification of intracranial contribution to rheoencephalography by a numerical model of the head." Clinical Neurophysiology 111, no. 7 (July 2000): 1306–14. http://dx.doi.org/10.1016/s1388-2457(00)00304-7.
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Shidlovskaya, Tetiana, Tamara Shidlovskaya, and Lyubov Petruk. "Correlation between the main parameters SLAEP and rheoencephalography in patients with acoustic trauma." OTORHINOLARYNGOLOGY 2-3(2) 2019, no. 2-3(2) 2019 (November 29, 2019): 4–13. http://dx.doi.org/10.37219/2528-8253-2019-2-04.
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It is known that vascular factor is one of the main factors of occurrence and development of SHL of any etiology. Our previous studies have shown that this statement is also true in relation to sensorineural disorders that occur in acoustic trauma. With acoustic trauma, both peripheral and central – the brainstem and cortical departments of the auditory analyzer suffer. At the same time, in terms of clarifying the topic of the lesion of the auditory system, the temporal characteristics of the SLAEP are very informative, which allow to identify violations in the brainstem structures of the auditory analyzer, including those in the early stages. On the other hand, it is known that the correlation analysis of the results of instrumental studies is very important in relation to the characteristics of the relationship between certain indicators that characterize the relevant processes. The purpose of the study is to determine the correlation coefficients between the temporal indices of SLAEP and quantitative values of rheoencephalography data to clarify the relationship (correlation) between the state of the brains- tem structures of the auditory analyzer and cerebral blood circulation in the carotid and vertebrobasilar systems in pa- tients with acoustic trauma. Materials and methods: to achieve this aim, we examined 71 patients with acoustic trauma at the age of 19-50 years, with predominantly bilateral asymmetric sensorineural disorders, a descending type of audiometric curve, a moderate degree of decrease in auditory function, the most pronounced significant (P<0.01) increase in hearing thresholds to tones 4, 6 and 8 kHz on the tonal threshold audiometric curve. Cerebral blood flow in patients with acoustic trauma was studied by rheoencephalography using a computer rheograph of the company «DX-systems» (Ukraine) according to the generally accepted method. Registration of shortlatency auditory evoked potentials (SLAEP) was carried out using the analyzing system «Eclipse» of the company «Interacoustics» (Denmark), according to the generally accepted method. To identify the correlation between the brainstem structures of the auditory analyzer and cerebral circulation in the vertebrobasilar and carotid systems, we took into account the correlation coefficients (r) and their errors (mr) between the main indicators REG in the carotid and vertebrobasilar systems, as well as the most informative time indicators SLEP patients with acoustic trauma. Results and discussion: We carried out a correlation analysis between the values of LPP V wave of SLAEP and MPI (I-V) SLAEP, as well as the values of DCI, DSI and Pi in the carotid and vertebrobasilar systems in servicemen with combat acoustic trauma. The determination of such a connection is important because the severity of the lesion of the auditory system and the prognosis of the effectiveness of therapeutic measures in acoustic trauma largely depends on the presence and severity of dysfunction in the brainstem structures of the auditory analyzer. The obtained data confirm the influence of the state of cerebral circulation on the development of functional disorders of the cerebrospinal structures of the brain and the auditory analyzer in acoustic trauma. There is a direct correlation in the development of such disorders with changes of the tone of cerebral vessels, but especially - violations of venous outflow. According to our data, in the carotid system, there is a weak direct correlation between the value of DCI, reflecting the tone of cerebral vessels, and LPP V wave of SLAEP (r=0.309; mr=0.063), as well as MPI I-V SLEP (r=0.322; mr=0.042). A weak direct correlation was also found between these indicators in the vertebralbasilar system, where the corresponding correlation coefficients were r=0.385, and mr=0.061, and r=0.348, and mr=0.036. Between LPP V - SLAEP and DSI, which characterizes venous outflow, in the carotid system, r was 0.458 and mr=0.057, and for MPI I-V SLEP the coefficient was (r=0.463; mr=0.049). A direct correlation between these indicators was found in the vertebral-basilar system (the corresponding values were: r=0.516, mr=0.021 and r=0.523, mr=0.022). Conclusion: Correlation analysis showed the presence of a relationship between the state of cerebral circulation according to REG in carotid, and, especially, in the vertebrobasilar systems and temporal indices of SLAEP in patients with acoustic trauma obtained in real combat conditions. In patients with acoustic trauma, a significant inverse correlation was found between the temporal indices of SLAEP and the values of Ri according to REG data characterizing the state of pulse blood filling in the vertebrobasilar pool. Thus, a significant inverse correlation (r=-0,527, mr=0,068) is observed between the values Ri and the duration of the inter-peak interval I-V SLAEP, for the duration of the LPP V wave r was -0,512, and mr=0,026. Only weak direct correlation in both carotid and vertebral-basilar systems was found with DCI indicators reflecting the state of cerebral vascular tone in the studied temporal characteristics of SLAEP. This may be due to the risk of changes in the tone of cerebral vessels (the tendency to both increase and decrease) in this contingent of patients. With the value of DSI, which characterizes venous outflow, there is a direct correlation with both LPP V wave and MPI I-V SLAEP in both systems of cerebral blood supply. In the carotid system between LPP V SLAEP and DSI, r was equal to 0.458, and mr=0.057, and between MPI I-V SLAEP and the value of DSI was (r=0.463; mr=0.049), in the vertebrobasilar system, the corresponding values were r=0.516, mr=0.021 and r= 0.523, mr=0.022.
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Leshchyna, I., T. Mozgova, and S. Fedorchenko. "Clinical and psychopathological aspect of electrophysiological abnormalities in adolescents with behavior disorders." European Psychiatry 41, S1 (April 2017): S446. http://dx.doi.org/10.1016/j.eurpsy.2017.01.462.
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Medical and social significance of behavioral disorders in adolescents and their consequences makes the relevance of the study of clinical manifestations and causes the need for early preventive intervention.AimStudying the role of neurophysiological disorders in the formation of behavior disorders in adolescents.Two hundred and two adolescents aged 11–15 years with behavior disorders were observed. The diagnostic methods included electrophysiological, clinical psychopathological and statistical methods.In the structure of behavioral disorders, psychopathological syndromes in adolescents have been identified: psychopathic (n = 106), asthenoneurotic (n = 50), asthenoabulic (n = 26) and anxiety-depressive (n = 20).As a result, it was found that high seizure activity commonly observed in adolescents with anxiety-depressive syndrome (66.67 ± 10.33%); less frequently in adolescents with asthenoneurotic (40.00 ± 6.79%), psychopathic (38.71 ± 4.64%), asthenoabulic (28.57 ± 8.68%) syndromes.At the same time, diffuse changes with dysregulation of the diencephalic-stem structures were observed in the majority of adolescents with psychopathic (61.29 ± 4.64%), asthenoneurotic (60.00 ± 6.79%), asthenoabulic (57.15 ± 9.51%) syndromes and much less frequently in adolescents with anxiety-depressive symptoms (33.33 ± 10.33%).Dystonic rheoencephalography type was observed in a third of adolescents with psychopathic (35.48 ± 4.55%), asthenoneurotic (30.00 ± 6.35%) and anxiety-depressive (33.33 ± 10.33%) syndromes, while the hypertensive rheoencephalography type was prevailed in adolescents with astenoabulic symptoms (14.29 ± 6.73%).Liquor hypertension in adolescents with asthenoneurotic (15.00 ± 4.95%) and psychopathic (9.67 ± 2.81%) syndromes was more common.The statistical analysis indicated that violations of bioelectric properties of the brain with high seizure activity and dysfunction of the low stem structures and disorders of cerebral hemodynamics by dystonic type are risk factors for the formation of behavioral disorders in adolescents.Detection of neurophysiological disorders in adolescents is an informative diagnostic method of early signs of behavioral disorders.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Popovic, Djordje, Michael Bodo, Frederick Pearce, Stephen van Albert, Alison Garcia, Tim Settle, and Rocco Armonda. "Assessment of cerebral blood flow autoregulation (CBF AR) with rheoencephalography (REG): studies in animals." Journal of Physics: Conference Series 434 (April 18, 2013): 012042. http://dx.doi.org/10.1088/1742-6596/434/1/012042.
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Prodius, Petr A., Aleksey E. Bazhenov, and Mariya D. Berstneva. "Asymmetry of Cerebral Circulation in the Internal Carotid Arteries in Students Under Short-Term Mental Load: Relationship with the Efficiency of Behaviour Control." Journal of Medical and Biological Research, no. 2 (May 14, 2023): 184–96. http://dx.doi.org/10.37482/2687-1491-z144.
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The purpose of this paper was to study the relationship between cerebral circulation during shortterm mental load and the efficiency of behaviour control. Previous studies failed to provide a clear picture of the functional restructuring of cerebral circulation in response to mental activity. One of the reasons for the ambiguity of their results may be individual differences. This is confirmed by the existing typological differences in cerebral circulation at rest and in response to mental load. In this study, we highlighted another potential typological feature, namely, bilateral asymmetry of cerebral circulation in the internal carotid arteries. The available data suggest that the asymmetry of cerebral circulation is linked with the productivity of mental activity and the efficiency of behaviour control. Materials and methods. Rheoencephalography was used to study the parameters of cerebral circulation in 20 students (aged 19–23 years) during mental load (Go/No-Go test). The stimuli were presented on a monitor using the PsychoPy program. The reaction time and the number of errors were evaluated. Rheoencephalograms were recorded using the Reo-Spektr rheoencephalograph. Pulse volume at rest and during mental load in the internal carotid arteries was assessed according to the amplitude-frequency index (AFI). Blood flow asymmetry in the frontal regions was assessed using the asymmetry coefficient. Results. Under short-term mental load in students, a tendency towards a moderate increase in pulse volume in the frontal regions was observed. A negative correlation was established between the AFI in the right frontal region and the number of errors in the Go/No-Go test. The research into the relationship between blood flow asymmetry in the internal carotid arteries and execution accuracy of the Go/No-Go test revealed a positive correlation between the predominance of blood circulation in the left frontal area and test execution accuracy. Prospects for using the asymmetry of cerebral circulation in the internal carotid arteries to predict mental activity efficiency are discussed.
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Datsenko, G. V., A. V. Shayuk, I. V. Dzevulska, T. M. Kyselyova, and V. I. Kyrychenko. "Features of correlations of cerebral circulation indicators with anthropo-somatotypological parameters of the body in practically healthy young men of mesomorphic somatotype." Biomedical and Biosocial Anthropology, no. 32 (September 20, 2018): 13–20. http://dx.doi.org/10.31393/bba32-2018-02.
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The peculiarities of the relations of rheoencephalographic indices with anthropometric indices in the healthy domestic samples studied are an important diagnostic criterion and a marker of pathological states from the cerebral vessels in the studied somatotype. The purpose of the work is to determine the features of correlations of indicators of cerebral circulation with constitutional parameters of the body of practically healthy young men from Podillia with mesomorphic somatotype. On the base of the research center of the National Pirogov Memorial Medical University, Vinnytsya, conducted a comprehensive study of 62 practically healthy urban youths of mesomorphic somatotype, of inhabitants of the Podillia region of Ukraine in the third generation. All of them have undergone a rheoencephalography using a computer diagnostic complex; anthropometric study according to the scheme of V. V. Bunak; craniometry; determination of components and type of somatotype by J. Carter and B. Heath and components of body mass index by J. Matiegka and American Institute of Nutrition. The correlation analysis was performed using the Pearson method in the statistical package “Statistica 6.1”. In the practically healthy young men of the mesomorphic somatotype, the following multiple correlations of cerebral blood flow parameters with constitutional parameters of the body are established: direct of middle power (r = 0.36 to 0.38) correlations of the base impedance with indicators of the thickness of skin and fat folds on the lower extremity, the endomorphic component of the somatotype and the fat component of the body mass using the Matejko method; direct, predominantly average strength (r = 0.30 to 0.40), correlations of the rising part of the rheogram and time of rapid blood filling with all total and longitudinal body dimensions, distal epiphysis widths of the upper extremity, muscle mass component of the body by the Matiegka method, and the bone component of the body mass using the Matiegka method (only for the time of rapid blood filling), as well as the direct mean (r = 0.31 to 0.37) and weak strength (r = 0.26 in all cases), correlations of slow blood flow time with most longitudinal body sizes; inverse, mainly average strength (r = -0.30 to -0.44), correlations of the dicrotic index with all total, most of the longitudinal body sizes, most of the girth indices of the limbs, muscle and bone components of the mass of the body by the method of Matiegka and muscular by the method of the American Institute of Nutrition method, as well as direct, mostly average forces (r = from 0.30 to 0.47), correlations of indicators of tone of all arteries, tone of arteries of large caliber and tone of arteries of medium and small caliber with most longitudinal body sizes. Attention is drawn to the lack of reliable correlations of only the amplitude indicators with total body sizes. In the analysis of correlations of rheoencephalography indicators with constitutional parameters of the body in practically healthy young men of mesomorphic somatotype among all groups of indicators of cerebral circulation for time indicators, the largest number of reliable connections found, mostly with total body sizes (53.3%, here and thereafter from the total number of these indicators), longitudinal body dimensions (52.0%), body mass index components (20.0%), circumferential body dimensions (18.7%), width distal epiphyses long limb bone (15.0%) and cephalometric indexes (14.3%). The highest percentage of correlations with body diameters (14.3%), components of somatotype (13.3%), cephalometric indices (11.4%) and components of body composition (10.0%) were established for amplitude parameters; and for derivative indicators - with longitudinal body dimensions (45.0%), body total dimensions (29.2%), body sizes (16.7%), body composition components (15.6%), width distal epiphyses of long limb bones (12.5%) and diameters of the body (10.7%).
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Uraeva, Ya I., I. I. Ivanova, N. N. Lazarenko, E. V. Filatova, I. A. Pankova, V. E. Illarionov, and V. A. Epifanov. "The effect of hirudotherapy on cerebral circulatory homeostasis in patients with genital endometriosis." Fizioterapevt (Physiotherapist), no. 5 (September 26, 2020): 58–66. http://dx.doi.org/10.33920/med-14-2010-05.
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The results of the treatment of women (n = 94) suffering from genital endometriosis are presented. The first (control, n = 30) group of women received standard drug therapy; the second (main, n = 64) group of women additionally had hirudotherapy procedures using medical leeches. The course of treatment consisted of 10–12 procedures. The state of cerebral circulation was assessed according to the rheoencephalography data before and after the treatment, as well as after 1, 3, 6, and 9 months. As a result, in patients in the 2-nd (main) group receiving complex treatment, the state of cerebral circulation improved signifi cantly. Moreover, according to the statistical regression analysis, it was possible to predict its further decrease by two periods ahead, compared with the treatment results in patients in the 1-st (control) group.
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Kulagin, Pavel A., Mikhail M. Lapkin, Elena A. Trutneva, and Roman A. Zorin. "SEX DIFFERENCES OF THE HUMAN BRAIN HEMODYNAMIC SUPPLY DURING THE PERFORMANCE OF THE SIMULATED COGNITIVE ACTIVITY." Journal of Volgograd State Medical University 19, no. 3 (March 15, 2022): 34–40. http://dx.doi.org/10.19163/1994-9480-2022-19-3-34-40.
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The article provides research data devoted to the study of an actual scientific problem of human physiology the identification of sex differences in human cerebral hemodynamics during the solving cognitive tasks. Cognitive activity was modeled using a two-colored Schulte Gorbov test, cerebral hemodynamics was assessed by the method of rheoencephalography, registering it in the fronto-mastoidal and occipito-mastoidal leads on the left and right. The obtained data indicate that the hemodynamic supply of brain activity in subjects of different sexes during the solution of cognitive tasks differs significantly. In particular, it was found that when the Schulte Gorbov test was performed in male subjects, hemodynamic changes were observed in the occipital region mainly on the right, while in females in the occipital region both: on the left and on the right.
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Moskalenko, Yu E., T. I. Kravchenko, and Yu V. Novozhilova. "Quantitative evaluation of slow fluctuations of the volume of liquids inside cranial cavity." Russian Osteopathic Journal, no. 1-2 (July 23, 2019): 51–63. http://dx.doi.org/10.32885/2220-0975-2019-1-2-51-63.
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Introduction. Slow fl uctuations in the volume and pressure of liquids in the cranial cavity have been known for a long time and have been studied for more than 100 years. However, their quantitative indicators and their practical signifi cance remain unclear until now due to the diffi culties of research. Nevertheless, it was found that they were connected with the brain activity, which made it possible to use them as one of the physiological indicators in studying the problems of manned space fl ights. Goal of research — to study the possibility of using spectral analysis of slow fl uctuations of the volume of liquids inside the cranium in order to realize the quantitative assessment of their indicators with the use of modern microelectronics and computer technology.Materials and methods. In order to solve this problem we created a complex, in which rheoencephalograph-RG-01 («Mizar») was used as a converter-modulator of physiological signals into electrical oscillations. The device was connected with the ADC (Firm «ADIstrument»), Its software allows to calculate the spectrogram with a sampling rate of 128 kHz. Studies were conducted on volunteers of younger, middle and older age groups. The respiratory rate and the electrocardiography were registered together with the rheoencephalography. Electrodes were fi xed on the volonteers′ fronto-mastoid area.Results. Slow fl uctuations the cranium representan independent physiological phenomenon. The most considerable and valuable were fl uctuations in 0,1–0,3 Hz. It was found that current frequency of 100 or 200 kHz and frequency for quantization of 80–100 kHz was optimal for performing their spectrograms. The structure of such diagram consists of 4–7 peaks with amplitude of 0,4–0,7 units compared with REG pulse amplitude. They depend on age and are characterized by hemispheric asymmetry. Spectral diagrams of slow fl ucation inside cranium are representing inpendent physiological phenomenon. These fl uctuations are not connected by common origin, with heart activity and respiration. They are connected by nature with brain activity and PRM.Conclusion. Can be an informative method for diagnostic and assessment of general status of osteopathic patients well as for the assessment of mechanisms of action of some osteopathic techniques.
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González, Carmen, Erik Jensen, Pedro Gambús, and Montserrat Vallverdú. "Entropy Measures as Descriptors to Identify Apneas in Rheoencephalographic Signals." Entropy 21, no. 6 (June 18, 2019): 605. http://dx.doi.org/10.3390/e21060605.
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Rheoencephalography (REG) is a simple and inexpensive technique that intends to monitor cerebral blood flow (CBF), but its ability to reflect CBF changes has not been extensively proved. Based on the hypothesis that alterations in CBF during apnea should be reflected in REG signals under the form of increased complexity, several entropy metrics were assessed for REG analysis during apnea and resting periods in 16 healthy subjects: approximate entropy (ApEn), sample entropy (SampEn), fuzzy entropy (FuzzyEn), corrected conditional entropy (CCE) and Shannon entropy (SE). To compute these entropy metrics, a set of parameters must be defined a priori, such as, for example, the embedding dimension m, and the tolerance threshold r. A thorough analysis of the effects of parameter selection in the entropy metrics was performed, looking for the values optimizing differences between apnea and baseline signals. All entropy metrics, except SE, provided higher values for apnea periods (p-values < 0.025). FuzzyEn outperformed all other metrics, providing the lowest p-value (p = 0.0001), allowing to conclude that REG signals during apnea have higher complexity than in resting periods. Those findings suggest that REG signals reflect CBF changes provoked by apneas, even though further studies are needed to confirm this hypothesis.
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Kokh, L. I., L. V. Kapilevich, K. A. Kologrivov, T. V. Fyodorova, and Ye V. Koshelskaya. "The role of vegetovascular malfunction in primary dysmenorrhea pathogenesis." Bulletin of Siberian Medicine 3, no. 2 (June 30, 2004): 90–97. http://dx.doi.org/10.20538/1682-0363-2004-2-90-97.
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Peculiarities of vegetovascular malfunction at functional dysmenorrhea has been investigated. 107 women with dysmenorrhea and 10 healthy women have been examined. Methods of pelvis minor organ rheography, rheoencephalography and cardiointervalography have been used. It has been revealed that at women with dysmenohhrea a disorganization of pelvis minor regional circulation developed during the first phase of menstrual cycle. It was evident in simultaneous decrease of cerebral vessel blood filling and increase of venous drainage, development of microcirculation disturbances. Simultaneously the enhancement of sympathetic effect and decrease of the effect degree of parasympathetic nervous system have been observed. On the contrary, at healthy women it is observed the enhancement of parasympathetic effect and the hemodynamic factors remain fixed.The obtained results are evidence that at women with dysmenorrhea the marked vegetovascular disturbances connected with sympathetic tone prevalence and being evident mainly at cerebral hemodymanics level take place in the first days of menstrual cycle. The nature of revealed disturbances is connected with the peculiarities of disease clinics.
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Levina, I. L., O. V. Matveeva, A. Yu Stupnikova, A. V. Doroshilova, and E. V. Belykh. "Clinical case of craniovertebral junction tumor simulating nasopharyngeal carcinoma." Kazan medical journal 96, no. 1 (February 15, 2015): 124–28. http://dx.doi.org/10.17750/kmj2015-124.
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A rare case of the long-term observation of a patient with craniovertebral junction tumor is decribed. The presented case report includes a number of noteworthy features. The onset of the disease as the nasopharyngeal tumor symptoms, unusual anterior tumor growth towards the nasopharyngeal lumen with cuff inclusion of СI-СII vertebral bodies and posterior growth towards the spinal canal, signs of development disorder and perinatal organic brain damage were the factors creating considerable difficulty in determining the tumor nature and structure, which in turn influenced the treatment choice. Results of the patient’s examination for «nasopharyngeal carcinoma extending into the oropharynx» were analyzed. Insufficient capabilities of such methods as rheoencephalography, electroencephalography, echoencephalography, brachiocephalic arteries duplex scanning, transcranial magnetic stimulation for the diagnosis of craniovertebral junction tumor are shown. The difficulties of the biopsy histological and immunochemical study results interpretation out of clinical context and radiological data are discovered. Contrast spiral computed tomography and magnetic resonance imaging allowed to clarify the craniovertebral junction tumor nature and spreading.
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Kolmakov, D. V. "Diagnostics and treatment of traumatic brain injury in children." Bulletin of Siberian Medicine 8, no. 1 (February 28, 2009): 61–63. http://dx.doi.org/10.20538/1682-0363-2009-1(2)-61-63.
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In this work, we have analyzed 2 774 case records of children after traumatic brain injury for the period of 2003 to 2007 (based on materials of the Tomsk Municipal Children’s Hospital No. 4). The age structure and causes of a traumatic brain injury have been analyzed. Most often complaints of children coming to the hospital are revealed, as well as typical changes in the cerebral hemodynamics (from the data of по данным rheoencephalography) and some parameters characterizing the neurological status of patients immediately after the injury and six months later. Based on the analysis of case records and health status questionnaires of children having traumatic brain injury up to six months later, it is shown that parents of patients in some cases do not adhere doctor’s recommendations after leaving the hospital. The therapy of traumatic brain injury in children requires successive treatment in hospital and at home and development of simple and acceptable rehabilitation schemes for children.
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Shydlovska, T. A., T. V. Shydlovska, and L. G. Petruk. "Comparative analysis of qualitative indices of rheoencephalography in workers of "noisy" production and patients with acoustic trauma." Ukrainian Journal of Occupational Health 2015, no. 4 (December 31, 2015): 54–61. http://dx.doi.org/10.33573/ujoh2015.04.054.
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Serebrennikova, О. А., V. V. Semenchenko, S. V. Dmytrenko, A. I. Semenenko, O. L. Ocheretna, О. Ye Maievskyi, and А. V. Shayuk. "CORRELATION CONSTITUTIONAL PARAMETERS OF A BODY IN PRACTICALLY HEALTHY WOMEN OF MIDDLE INTERMEDIATE SOMATOTYPES WITH RHEOENCEPHALOGRAPHY INDICATORS." World of Medicine and Biology 14, no. 63 (2018): 075. http://dx.doi.org/10.26724/2079-8334-2018-1-63-75-78.
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Cherepova, O. V., S. V. Gusakova, and M. V. Zlobina. "Peculiarities of cerebral hemodynamics and cerebral bioelectric activity under infectious mite borreliosis." Bulletin of Siberian Medicine 2, no. 3 (September 30, 2003): 42–49. http://dx.doi.org/10.20538/1682-0363-2003-3-42-49.
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Cerebral hemodynamics state and peculiarities of bioelectric cerebral activity in patients with infectious mite borreliosis (IMB) have been investigated. 24 patients out of acute stage have been examined; the control group has been consisted of 10 healthy people. Values of rheographic index, index of vessel peripheral resistance, time of pulse wave spread, venous drainage index and elastic resistance index have been evaluated by rheoencephalography method (REG). ElectroEncephaloGram (EEG) has been registered in 12 abstractions according to the international system 10—20. Amplitude, frequency and indices of α-, β-, δ- and θ-rhythms, asymmetry degree and presence of paroxysmal activity have been evaluated. Use of EEG at patients with IMB has marked the α-rhythm suppression and increase of slow activity of δ- and θ-ranges, electric activity asymmetry and presence of paroxysmal discharges. By REG method there have been revealed expressed functional disturbances of cerebral circulation. Together with the impediment of venous drainage, this leads to the regulatory imbalance and the decrease of hemodynamic supply to separate cortex parts that may be a reason of bioelectric cerebral activity disturbances in patients with IMB.
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Masalov, I. S., Yu V. Andreeva, S. K. Erkebaeva, and G. B. Weinstein. "A method for automated determination of parameters describing intracranial liquorodynamics from the data of rheoencephalography and transcranial dopplerography." Journal of Evolutionary Biochemistry and Physiology 49, no. 1 (January 2013): 125–27. http://dx.doi.org/10.1134/s0022093013010155.
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Maksimovich, Ivan V. "Possibilities of Application of Transcatheter Treatment of Vascular Dementia with Binswanger’s Disease." Global Journal of Health Science 9, no. 6 (October 28, 2016): 13. http://dx.doi.org/10.5539/gjhs.v9n6p13.
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INTRODUCTION: The research is dedicated to the main features of brain angioarchitectonics caused by the development of Binswanger’s disease (BD), as well as to the effectiveness of the method of transcatheter laser revascularization of cerebral vessels in the treatment of this disease.MATERIALS: We examined 23 patients with BD whose age ranged from 58 to 81, mean age 78, including 15 (65.22%) men and 8 (34.78%) women. The examination included Clinical Dementia Rate (CDR), Mini-Mental State Examination (MMSE), Index Bartels (IB), laboratory examination, scintigraphy (SG), rheoencephalography (REG), Computed Tomography (CT), Magnetic Resonance Imaging (MRI) and cerebral multi-gated angiography (MUGA).14 (60.87%) patients underwent transcatheter interventions - Test Group.9 (39.13%) patients had conservative treatment - Control Group.RESULTS: Test Group: favorable clinical result - 9 (64.29%) cases; adequate clinical result - 5 (35.71%) cases; comparatively adequate and comparatively positive clinical results were not attained in any case.Control Group: favorable and adequate clinical results were not achieved in any case; comparatively adequate clinical result was gained in 7 (77.78%) cases; comparatively positive clinical result - in 2 (22.23%) cases.CONCLUSIONS: The method of transcatheter laser revascularization of cerebral vessels furthers natural angiogenesis, induces collateral and capillary revascularization both in ischemic areas and in closely located tissues, thereby improving cerebral blood flow. At the same time, laser energy promotes the restoration of metabolic processes in neurons. It significantly distinguishes the proposed method from conservative treatment.