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2.
Vestn Ross Akad Med Nauk ; (6): 12-7, 2007.
Artigo em Russo | MEDLINE | ID: mdl-17691486

RESUMO

The passage of a pulse wave via an intact segment of a dog's thoracic aorta, its denerved autograft, and thoracic aortal allograft from a dog donor, was studied using equipment for arterial pressure measurement and tensometry of longitudinal and transversal blood vessel deformations at the point of pressure measurement. The frequency characteristics of the equipment were adjusted beforehand. The experiment demonstrated the impossibility of the formation and spread of a normal solitary pulse wave and preservation of laminar blood flow without an intact aortal innervation. Optimal blood flow hydrodynamics in the aorta is possible only in the presence of the system for neuroreflectory control of each wave passing; the system must determine the solitary character of the wave and provide antifluttery stabilization for blood flow.


Assuntos
Aorta Torácica/fisiologia , Velocidade do Fluxo Sanguíneo/fisiologia , Vasoconstrição/fisiologia , Animais , Pressão Sanguínea/fisiologia , Cães , Pulso Arterial
3.
Morfologiia ; 126(5): 30-3, 2004.
Artigo em Russo | MEDLINE | ID: mdl-15847292

RESUMO

Using light and electron microscopic methods, the histogenesis and structural organization of the walls of rat venae cavae and pulmonary veins were studied in prenatal and postnatal periods of development. The special attention was paid to the appearance of the striated myocytes in the walls of these vessels during the process of ontogenesis. The time of initial divergent development of myoblastic differon was established, the stages of differentiation of striated myoblasts and the peculiarities of intercellular junctions were characterized, as well as the innervation and vascularization of the walls of venae cavae and pulmonary veins.


Assuntos
Organogênese , Veias Pulmonares/embriologia , Veias Pulmonares/crescimento & desenvolvimento , Veias Cavas/embriologia , Veias Cavas/crescimento & desenvolvimento , Animais , Diferenciação Celular , Células Musculares/citologia , Fibras Musculares Esqueléticas/citologia , Veias Pulmonares/citologia , Ratos , Veias Cavas/citologia
4.
Angiol Sosud Khir ; 9(4): 119-21, 2003.
Artigo em Russo | MEDLINE | ID: mdl-14657921

RESUMO

Between 1993 and 2002, 41 operations were performed for formation of a vascular access (VA) to conduct hemodialysis using vascular transplants: autogenous veins (8 cases) and PTFE allografts (33 cases). Experience gained with the use of autogenous veins and PTFE allografts for creation of a permanent VA to carry out hemodialysis was summarized and analyzed. An attempt was made to explain the causes of thrombosis of autogenous veins transplanted and allo-vessels implanted on the basis of the new general theory of circulation. The technical procedures accomplished during operations aimed at the prolongation of the time of VA functioning were offered and substantiated.


Assuntos
Hemodinâmica/fisiologia , Falência Renal Crônica/fisiopatologia , Falência Renal Crônica/terapia , Diálise Renal/instrumentação , Fístula Vascular , Humanos , Transplante Homólogo
5.
Biofizika ; 42(3): 694-701, 1997.
Artigo em Russo | MEDLINE | ID: mdl-9296630

RESUMO

In the article a problem of the flow near of elastic surface body whalelike is considered. The opportunity appearance of the flutter on a surface body is shown. Additional capacity, necessary dolphin is designed at navigation in case of occurrence the flutter. It is shown, that this capacity makes about 26% of limiting capacity, output dolphin. Number Relcr = 4,4.10(6) transition to flutter's mode of the flow the body of the dolphin is found. It is discussed evolutionary formed the mechanism of antiflutter stabilization of the body.


Assuntos
Golfinhos/fisiologia , Modelos Biológicos , Natação , Animais , Modelos Teóricos
6.
Biofizika ; 33(4): 675-80, 1988.
Artigo em Russo | MEDLINE | ID: mdl-3191179

RESUMO

This work deals with the liquid flow in an elastic blood vessel. The mechanism of the initiation of standing waves was studied. Results of model experiments, both on the hydrodynamic stand and in the aorta of the living dog are presented.


Assuntos
Aorta Torácica/fisiologia , Circulação Sanguínea , Modelos Biológicos , Animais , Velocidade do Fluxo Sanguíneo , Pressão Sanguínea , Cães , Humanos , Matemática
7.
Arkh Anat Gistol Embriol ; 94(6): 38-47, 1988 Jun.
Artigo em Russo | MEDLINE | ID: mdl-3190469

RESUMO

The work deals with one of the least elaborated aspects on the system of microcirculation and is performed, taking into account the functions of histo-hematic and intertissue barriers. For this certain new original investigation methods have been developed, adequate to the problems discussed. The module principle of organization with a distinct functional specialization of the ganglionar and truncal vascular micromodules has been stated. The working principle of each module is based on functional interaction of the intra- and extraneural capillary systems; this is ensured by mechanisms of the blood stream redistribution: by arteriolar, precapillary and prevenular sphincters and by pathways of the shunt blood stream. A high stability of the blood stream in the vascular constructions studied is explained as a possibility of counterstream gas exchange between the arterial and venous blood in the truncal vascular micromodule.


Assuntos
Sistema Digestório/irrigação sanguínea , Plexo Submucoso/irrigação sanguínea , Animais , Gatos , Sistema Digestório/inervação , Microcirculação/anatomia & histologia
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