scholarly journals Prevention of microcirculatory disorders in rats on suprathreshold physical exertion using the products of velvet antler industry

2018 ◽  
Vol 99 (6) ◽  
pp. 942-946
Author(s):  
A A Blazhko ◽  
I I Shakhmatov ◽  
V I Kiselev ◽  
I V Kovalev
Keyword(s):  
Blood Flow ◽  
Physical Exertion ◽  
Reproductive Organs ◽  
Physical Load ◽  
Doppler Flowmetry ◽  
Experimental Animals ◽  
Intact Group ◽  
Velvet Antler ◽  
Male Wistar Rats ◽  
Experimental Group

Aim. To assess the microcirculatory bloodstream after suprathreshold physical load in rats with preceding intake of products of velvet antler industry, as well as to determine which microcirculatory reactions cause the adaptive effect. Methods. The study included 30 male Wistar rats. Two groups of experimental animals received the concentrate containing blood and histolysate of Siberian stag reproductive organs, 4.5 ml per day. The rats of the first experimental group were subjected to an 8-hour physical load on day 31, and rats of the second group were not subjected to the load. Indices of microcirculation obtained by laser Doppler flowmetry in experimental animals were compared to those of intact rats. Results. In animals of the first experimental group, the amplitude of respiratory waves increased in comparison with intact animals, while the remaining indices of the microcirculation system did not differ from those of the intact group. In the rats of the second experimental group, there was an increase in the flax, which indicates an increase in the modulation of the blood flow; in rats an increase in the amplitude of endothelial and vasomotor waves was revealed in comparison with intact animals against the background of constant amplitudes of respiratory and pulse waves. Conclusion. Preceding 30-day intake of a concentrate containing blood and histolysate of Siberian stag reproductive organs, in general, was found to prevent the development of disturbances of the microcirculatory bloodstream in rats after the suprathreshold physical load due to active mechanisms of blood flow regulation - increase of the amplitudes of endothelial and vasomotor waves.

The state of thrombotic readiness in rats at suprathreshold physical load and its correction by products of velvet antler industry

2018 ◽  
Author(s):  
А.А. Блажко ◽  
И.И. Шахматов ◽  
И.В. Ковалев ◽  
Ю.А. Бондарчук ◽  
О.М. Улитина ◽  
...  
Keyword(s):  
Reproductive Organs ◽  
Physical Load ◽  
Internal Organs ◽  
Group 4 ◽  
Partial Activation ◽  
Velvet Antler ◽  
Male Wistar Rats ◽  
Body Resistance ◽  
Group 3

Введение. При действии чрезмерных стрессоров различной природы система гемостаза может отвечать формированием состояния тромботической готовности, а чтобы избежать его развития необходимо повышать устойчивость организма и, в частности, системы гемостаза к стрессорным воздействиям. Одним из способов является применение продуктов пантового оленеводства. Цель исследования: оценить состояние системы гемостаза у крыс при однократной сверхпороговой физической нагрузке разной продолжительности, а также определить адаптационную роль предварительного курсового приема концентрата, содержащего кровь и гистолизат из репродуктивных органов марала. Материалы и методы. Исследования выполнены на 50 крысах-самцах линии Wistar: 4 экспериментальные группы и группа интактных животных по 10 крыс. Животных групп 1 и 2 подвергали 4-часовой и 8-часовой физической нагрузке, соответственно. Животные группы 3 принимали продукты пантового оленеводства (концентрат) в течение 30 дней и на 31-й день подвергались 8-часовой физической нагрузке. Животные группы 4 принимали концентрат в течение 30 дней и не подвергались воздействию физической нагрузки. Интактные крысы принимали воду в том же объеме, что и экспериментальные животные, и не подвергались воздействию физической нагрузки. Состояние системы гемостаза оценивали методом тромбоэластографии. Проведено гистологическое исследование легких крыс во всех группах. Результаты. 4-часовая физическая нагрузка вызывала частичную активацию системы гемостаза у крыс, усиливая наступление фазы инициации свертывания крови. 8-часовая физическая нагрузка вызывала у крыс развитие состояния тромботической готовности. Заключение. Предварительный курсовой прием продуктов пантового оленеводства снижал риск развития состояния тромботической готовности и повреждения внутренних органов у крыс после сверхпороговой физической нагрузки за счет повышения фибринолитической активности плазмы крови. Introduction. Under the action of excessive stressors of diff erent nature, hemostasis can respond by forming a state of thrombotic readiness. In order to avoid its development, it is necessary to increase body resistance and hemostasis in particular to stress eff ects. One of the methods is the usage of the products of velvet antler industry. Aim: to assess hemostasis in rats at a single suprathreshold physical load of different duration and to determine the adaptive role of preliminary intake of a concentrate containing blood and histolysate from maral reproductive organs. Materials and methods. Studies were performed on 50 male Wistar rats: 4 experimental groups and a group of intact animals, 10 rats each. Animals of groups 1 and 2 were exposed to 4-hour and 8-hour physical load, respectively. Animals of group 3 received products of velvet antler industry (concentrate) for 30 days and on 31st day were exposed to 8-hour suprathreshold physical load. Animals of group 4 received a concentrate for 30 days and were not exposed to physical stress. Intact rats took water in the same volume as experimental animals and were not exposed to physical activity. Hemostasis was assessed by thromboelastography. Histological examination of lungs was carried out in rats from all groups. Results. The 4-hour physical load caused partial activation of hemostasis, enhancing the phase onset of blood coagulation. The 8-hour physical load caused the development of thrombotic readiness. Conclusion. Preliminary intake of velvet antler products reduced the risk of thrombotic readiness development and damage of internal organs in rats after suprathreshold physical load due to increasing of blood fibrinolytic activity.

scholarly journals Features of blood`s microcirculation at physical loads

2020 ◽  
pp. 4-7
Author(s):  
Tetana Stanishevska ◽  
Оksana Gorna ◽  
Daria Horban ◽  
Olga Yusupova
Keyword(s):  
Physical Activity ◽  
Blood Flow ◽  
Physical Exertion ◽  
Doppler Flowmetry ◽  
Blood Microcirculation ◽  
Functional Reserves ◽  
State Pedagogical ◽  
Before And After ◽  
Human Cardiovascular System ◽  
Microcirculation Parameter

This research deals with the study of blood microcirculation peculiarities.Materials and methods. 72 students of Bogdan Khmelnytsky Melitopol State Pedagogical University, aged 18–19, were examined. The experimental research consisted of the study of blood microcirculation functional state by means of Laser Doppler flowmetry (LDF) method. It helped to evaluate the state of tissue blood-circulation and to detect individual-typological peculiarities of blood microcirculation under the influence of physical activity (before and after exercise).Results. Three types of blood microcirculation were identified by using LDF-metry. The normoemic type of blood microcirculation, characterized by the superposition of oscillatory rhythms and reflected the balance of the mechanisms of regulation of microcirculation. The hyperemic type, characterized by a «monotonous» LDF-gram with a high parameter of microcirculation, which reflects the relative predominance of metabolic mechanisms in the regulation of microcirculation. The hypoemic type, characterized by a «monotonous» LDF-gram with a low parameter of the microcirculation parameter, which reflects the decrease of vasomotor mechanisms in the regulation of microcirculation. According to the LDF-metric data, the examined students under intensive physical activity have a significant increase in microcirculatory status: by 6 % of the microcirculation parameter, by 28 % of the mean square deviation and by 45 % of the initial value of the coefficient of variation.Conclusions. This dynamics of microcirculation shows that under the influence of physical exertion, a person creates significant functional reserves for the redistribution of blood flow and for more perfect intraorgan capillary blood flow. It was found, that in the process of physical activity, morpho-functional rearrangements of the human cardiovascular system occur. This reaction is formed by several components of blood microcirculation: blood flow in the transport direction, regulating blood supply in accordance with the needs of tissues and the exchange component of the histochemical barrier

Differential regulation of renal regional blood flow by endothelin-1

1996 ◽  
Vol 271 (6) ◽  
pp. F1166-F1172 ◽  
Author(s):  
K. Gurbanov ◽  
I. Rubinstein ◽  
A. Hoffman ◽  
Z. Abassi ◽  
O. S. Better ◽  
...  
Keyword(s):  
Blood Flow ◽  
Receptor Antagonist ◽  
Bolus Injection ◽  
Regional Blood Flow ◽  
Doppler Flowmetry ◽  
Endothelin 1 ◽  
Male Wistar Rats ◽  
Eta Receptor ◽  
Etb Receptor ◽  
Eta Receptor Antagonist

The present study evaluated the effects and mechanisms of action of endothelin-1 (ET-1) on medullary and cortical blood flow (MBF and CBF, respectively). CBF and MBF were measured simultaneously by laser-Doppler flowmetry in anesthetized male Wistar rats. Bolus injection of ET-1 (1.0 nmol/kg iv) produced a sustained decrease in CBF (delta = -30%) and a transient increase in MBF (delta = +35%). The medullary vasodilation induced by ET-1 was observed with doses lower than that required to produce cortical vasoconstriction; was completely blocked by bosentan, a mixed ETA/B-receptor antagonist; and was mimicked by IRL-1620, a specific ETB-receptor agonist. In contrast, BQ-123, an ETA-receptor antagonist, failed to inhibit the ET-1-dependent medullary vasodilation but effectively blocked the cortical vasoconstriction induced by the peptide. Finally, inhibition of nitric oxide (NO) synthase completely abolished, whereas cylooxygenase inhibition attenuated, the effect of ET-1 on MBF. The data demonstrate that ET-1 exerts opposite effects on renal cortical and medullary circulation, i.e., ETA-receptor-mediated cortical vasoconstriction and ETB-mediated medullary vasodilation. Furthermore, the medullary vasodilation induced by ET-1 is dependent on the NO system and, to a lesser extent, on prostaglandin generation.

scholarly journals Morphological and radiological characteristics of experimental bone tissue regeneration

2021 ◽  
pp. 94-104
Author(s):  
E. A. Nadyrov ◽  
V. I. Nikolaev ◽  
S. I. Kirilenko ◽  
V. V. Rozhin ◽  
N. G. Maltseva ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Tissue Regeneration ◽  
Bone Tissue Regeneration ◽  
Control Group ◽  
Experimental Animals ◽  
Male Wistar Rats ◽  
Group A ◽  
Bone Trabeculae ◽  
The Right ◽  
Experimental Group

Objective. To study the dynamics of reparative bone tissue regeneration in experimental animals using a native transplantation autosmix (NTA).Materials and methods. Male Wistar rats weighing 180–200 g and aged 6–7 months were used. Bone tissue defects were modelled using a cutter with a diameter of 2 mm (experimental group). A similar defect of the middle third of the right tibia was formed in the control group animals without flling the defects with bone tissue. The animals were removed from the experiment on days 3, 7, 14, 30 and 60 of the experiment (per 6 animals for each observation period). The indicators of defect occupancy, necrosis, the area of bone trabeculae, the area of granulation tissue were determined in the histological sections. All the indicators were presented as percentage of the tested area. Osteoblasts, osteocytes, and osteoclasts were calculated in absolute values on the tested area.Results. The study has showed a higher rate of bone tissue formation in the bone defects in the experimental animals after autotransplantation of the bone mixture. Bone recovery in the experimental group had a higher rate, which was manifested by faster flling of the bone tissue defect, a low percentage of the necrosis area, a higher area of bone trabeculae, its rapid transformation into lamellar bone tissue.Conclusion. Osteogenesis had practically completed by day 30 of the experiment. At the same time, in the control group it had completed by day 60. The results obtained are a theoretical precondition for further research in the feld of bone autoplasty. Advanced development of surgical and minimally invasive technologies of bone mixture application will increase the effciency of modern reconstructive surgery of bones and joints.

Hypothermic cerebral reperfusion and recovery from ischemia

1991 ◽  
Vol 261 (3) ◽  
pp. H774-H781 ◽  
Author(s):  
W. A. Baldwin ◽  
J. R. Kirsch ◽  
P. D. Hurn ◽  
W. S. Toung ◽  
R. J. Traystman
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Oxygen Consumption ◽  
Cerebral Ischemia ◽  
Control Group ◽  
Experimental Animals ◽  
Anesthetized Dogs ◽  
Group Recovery ◽  
Cerebral Reperfusion ◽  
Experimental Group

The effect of transient postischemic hypothermia (30 degrees C) on recovery of cerebral blood flow (CBF), oxygen consumption (CMRO2) and somatosensory-evoked potentials (SEPs) was determined in anesthetized dogs. Ischemia was produced for 20 min by intracranial pressure (ICP) elevation while core temperature was lowered by cooling externalized blood. Epidural temperature was controlled at 37.6 +/- 0.2 degrees C during ischemia, lowered to 30.0 +/- 0.1 degrees C during the first hour of reperfusion, and then rewarmed to 38.0 +/- 0.1 degrees C in experimental dogs (n = 8) and maintained at 38.0 +/- 0.1 degrees C in control dogs (n = 8). ICP was lower throughout reperfusion in experimental as compared with control animals. By 240 min of reperfusion, CBF was approximately 70% of control in both groups. CMRO2 was 60% of preischemic values in control animals and 74% in experimental animals (P = 0.077). A persistent uncoupling of CBF and CMRO2 was observed throughout reperfusion only in the control group. Recovery of SEP amplitude was significantly improved in the experimental group (26 vs. 11% of preischemic values). These data suggest that transient hypothermia reduces ICP and facilitates recovery of electrophysiological function after cerebral ischemia.

Assessment of drugs increasing the reproductive function of cows of oocyte donors

2020 ◽  
pp. 122-126
Author(s):  
A. Plakhova ◽  
K. Plemyashov
Keyword(s):  
Maximum Concentration ◽  
Ultrasound Examination ◽  
Reproductive Function ◽  
Experimental Animals ◽  
Qualitative And Quantitative ◽  
Quantitative Characteristics ◽  
Oocyte Donors ◽  
Experimental Group ◽  
Qualitative And Quantitative Characteristics ◽  
Donor Cows

In these studies, a comprehensive assessment of the effect of the drugs «Carofertin» and «Hemobalance» on the reproductive function of oocyte donor cows was carried out. At the same time, the effect of these drugs on the biochemical parameters of blood serum, as well as on the concentration of progesterone, carotene in the experimental groups and the activity of the ovaries in the experimental animals was assessed. An increase in the activity of alkaline phosphatase in the first and third experimental groups was found, which amounted to 128.80 and 104.6 IU / L. There was also a decrease in the concentration of cholesterol in the experimental groups compared with the control. The maximum concentration of carotene was noted in the experimental group No. 1, which were injected with «Carofertin» subcutaneously, and in the experimental group No. 3, which were injected with «Carofertin» and «Hemobalance». The maximum concentration of progesterone was also noted in groups No. 3 and No. 1 and amounted to 21.98±3.03 and 17.01±9.68 nmol / l, respectively. In the course of ultrasound examination of the ovaries in experimental animals, a relationship was noted between the concentration of progesterone and the intensity of the blood supply of the corpus luteum on the ovaries in experimental animals. Subsequently, in one animal from each experimental group, oocytes were aspirated (OPU) twice with an interval of two weeks and their qualitative and quantitative characteristics were assessed. The maximum number of oocytes suitable for use was noted in the experimental group No. 3, which was injected with both study drugs.

Peculiarities of microcirculation in periodont tissues in children of key age groups sufficient type 1 diabetes. Part II

2019 ◽  
Vol 24 (2) ◽  
pp. 108-119 ◽  
Author(s):  
B. N. Davydov ◽  
D. A. Domenyuk ◽  
S. V. Dmitrienko
Keyword(s):  
Diabetes Mellitus ◽  
Blood Flow ◽  
Type 1 Diabetes ◽  
Type 1 Diabetes Mellitus ◽  
Laser Doppler Flowmetry ◽  
Laser Doppler ◽  
Diabetic Microangiopathy ◽  
Healthy Children ◽  
Doppler Flowmetry

Relevance. Morpho-functional changes in peripheral circulation established in type 1 diabetes mellitus correlate with changes in central hemodynamics, allowing the use of microcirculation indicators as diagnostic and prognostic criteria for assessing the degree of functional vascular disorders. Identifcation of microcirculation features of the blood by the method of laser Doppler flowmetry in children with different experience of type 1 diabetes in key age categories.Materials and methods. The study included 67 children with type 1 diabetes mellitus aged 12-15 years with an experience of the disease from six months to ten years. The comparison group consisted of 38 healthy children. The state of the microvasculature was assessed by laser Doppler flowmetry using a laser analyzer for capillary blood flow LAKK-OP.Results. In children with an experience of type 1 diabetes of less than two years, microcirculation disorders in periodontal tissues correspond to the hyperemic form, accompanied by increased perfusion, a decrease in the amplitude of low-frequency oscillations, increased heart rate, high blood flling, and blood flow bypass. For children with an endocrinopathy experience of more than three years, microcirculation disorders correspond to a stagnant form, combined with a decrease in perfusion due to stagnation of blood in the venular link, endothelial domination with suppression of neurogenic and cardiac fluctuations, low efciency and redistribution of blood flow in favor of the nutritive link.Conclusions. With the increase in experience, the degree of compensation of type 1 diabetes, the progression of diabetic microangiopathy, it is advisable to designate two stages of development of microcirculatory disorders. Early – compensatory with active adaptation, including neurogenic and endothelial regulation mechanisms. Late – decompensation with passive adaptation, supporting the effectiveness of microcirculation due to myogenic control of regulation, shunting and increasing the rate of blood outflow.

scholarly journals WALANT–Epinephrine injection may lead to short term, reversible episodes of critical oxygen saturation in the fingertips

2021 ◽  
Vol 141 (3) ◽  
pp. 527-533
Author(s):  
P. Moog ◽  
M. Dozan ◽  
J. Betzl ◽  
I. Sukhova ◽  
H. Kükrek ◽  
...  
Keyword(s):  
Blood Flow ◽  
Oxygen Saturation ◽  
Substantial Reduction ◽  
Tissue Perfusion ◽  
Critical Levels ◽  
Short Term ◽  
Doppler Flowmetry ◽  
Epinephrine Injection ◽  
Venous Oxygen Saturation

Abstract Introduction Although the WALANT technique’s long-term safeness has been demonstrated in many studies, there are only few data investigating its short-term effects on tissue perfusion and oxygen levels. It was hypothesized that, temporarily, critical levels of tissue perfusion may occur. Methods Seventeen patients, who were scheduled for different procedures in WALANT technique, were injected with 5–7 ml of 1% Articain containing 1:200,000 epinephrine at the finger base. Capillary-venous oxygen saturation, hemoglobin volume in the capillaries, and relative blood flow in the fingertips were recorded once per second by white light spectrometry and laser Doppler flowmetry before, during and after injection for an average of 32 min. Results Clinically, no persistent tissue malperfusion was observed, and there were no postoperative complications. Capillary-venous oxygen saturation was reduced by ≥ 30% in seven patients. Critical levels of oxygen saturation were detected in four patients during 13 intervals, each lasting for 132.5 s on average. Oxygen saturation returned to noncritical values in all patients by the end of the observation period. Blood flow in the fingertips was reduced by more than 30% in nine patients, but no critical levels were observed, as with the hemoglobin. Three patients demonstrated a reactive increase in blood flow of more than 30% after injection. Conclusions Injection of tumescent local anesthesia containing epinephrine into finger base may temporarily cause a substantial reduction in blood flow and lead to critical levels of oxygen saturation in the fingertips. However, this was fully reversible within minutes and does not cause long-term complications.

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