43771 - Lecturer: Ulyana B. Lushchyk, MD Coauthors: V.V....

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Lecturer: Ulyana B. Lushchyk, MD Coauthors: V.V. Novytskyy , I.P . Babiy, N.G. Lushchyk [email protected] www . lushchyk . org www.istyna.kiev.ua
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Methods of the vital investigation of the vascular system may be divided in accordance with such concepts: heart and vessel structure evaluation ; evaluation of the functional activity of the heart as a pomp ; vessel function evaluation ; evaluation of perfusion in organs and tissues ; evaluation of pressure in the vascular system ;
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Methods of the vascular system diagnostics may be grouped in accordance with the character of information receiving: · direct methods of imaging – giving a visual information of structural changes related to a pathological process; · indirect giving the information in the form of numbers of certain coefficients (parameters) known to a researcher, or in the form of diagrams ; · combined a simultaneous objectivation of structural and functional
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The problem of an adequate evaluation of the cerebral vascular system condition is inseparably connected with the evaluation of the whole hemodynamic system both at systemic and regional levels
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Historically the vascular system examination was based on the global approach, i.e. they evaluated the whole vascular system condition that excluded the possibility of local pathologies diagnostics. The current level of the diagnostic equipment enables to diagnose these processes at a local level, and, if necessary, to investigate the hemodynamic and functional relevance of a local impairment for a setback in the whole circulatory system (a global level).
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The arsenal of the modern diagnostic equipment is represented by vascular pathology objectivating methods used in practice : · rheography (REG); · sphygmography ; · echocardiography ( EchoCG ); · optic and computed capillaroscopy ; · nuclear diagnostics ; · angiography ; · ultrasound diagnostics (color angioscanning and dopplerography ); · laser dopplerography ( flowmetry of microcirculatory bloodstream ); · CT ; · magnetic resonance angiography (MRA) ; · coloring of grey-scale scanned MRA- and US-images
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RHEOGRAPHY (from Greek rheo – to flow, grapheo – to describe) Indirect noninvasive dynamic method . The method is based on a biophysical principle of the registration of tissues’ electric resistance changes during the passage of the current of a high frequency (20–40 KHz) and the low-voltage current (10 mА) through the investigated area with a graphical registration of pulse vibrations of the complex electric resistance. A living tissue is considered as an electric conductor that has an ionic conductivity. Vibrations of the electric resistance tangently reflect changes of speed and volume of the blood that flows through vessels. Blood flow pulse vibrations are registered in the form of curved synchronized vibrations of the electric resistance.
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The object of the investigation is a violation of the electric conductivity of an organ secondary to changes in its blood
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This note was uploaded on 02/23/2012 for the course PHARM 290 taught by Professor Staff during the Fall '10 term at Rutgers.

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43771 - Lecturer: Ulyana B. Lushchyk, MD Coauthors: V.V....

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