The hemodynamic significance of the flow properties of blood was put into perspective only during the past decade. Advances in modern technologies today allow the quantitative analy- sis of the fluidity of blood and its components under conditions approximating the flow in vivo, particularly those in the microcirculation. The hematocrit is the most important of the determinants of blood fluidity (reciprocal value of blood viscosity); acute increases in the hematocrit exert deleterious effects on circulation and oxygen transport owing to impaired fluidity of blood. High viscosity of plasma due to hyper- or dysproteinemias initiates the microcirculatory dysfunctions in hyperviscosity syndromes. Furthermore, the fluidity or deformability of red cells might be critically diminished and therefore cause redistribution of blood elements and adversely affect the resistance to flow within the microvessels. In low- flow states blood fluidity most likely becomes the key determinant for microvessel perfu- sion, overriding the neural and local metabolic control mechanisms operative at physiological conditions to adjust blood supply to tissue demand. Microcirculatory disturbances are there- fore encountered whenever driving pressures are reduced, as in shock or hypotension, and distal to stenoses of macrovessels, but also in hemoconcentration due to plasma volume con- traction, polycythemia, leukemia, and dysproteinemia. Based on experimental studies exploring the possibilities and limitations, with regard to improving the fluidity of blood by reducing the hematocrit, the concept of intentional hemo- dilution has been introduced to clinical medicine.
Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.
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Taschenbuch. Etat : Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The hemodynamic significance of the flow properties of blood was put into perspective only during the past decade. Advances in modern technologies today allow the quantitative analy sis of the fluidity of blood and its components under conditions approximating the flow in vivo, particularly those in the microcirculation. The hematocrit is the most important of the determinants of blood fluidity (reciprocal value of blood viscosity); acute increases in the hematocrit exert deleterious effects on circulation and oxygen transport owing to impaired fluidity of blood. High viscosity of plasma due to hyper- or dysproteinemias initiates the microcirculatory dysfunctions in hyperviscosity syndromes. Furthermore, the fluidity or deformability of red cells might be critically diminished and therefore cause redistribution of blood elements and adversely affect the resistance to flow within the microvessels. In low flow states blood fluidity most likely becomes the key determinant for microvessel perfu sion, overriding the neural and local metabolic control mechanisms operative at physiological conditions to adjust blood supply to tissue demand. Microcirculatory disturbances are there fore encountered whenever driving pressures are reduced, as in shock or hypotension, and distal to stenoses of macrovessels, but also in hemoconcentration due to plasma volume con traction, polycythemia, leukemia, and dysproteinemia. Based on experimental studies exploring the possibilities and limitations, with regard to improving the fluidity of blood by reducing the hematocrit, the concept of intentional hemo dilution has been introduced to clinical medicine. 224 pp. Englisch. N° de réf. du vendeur 9783540126201
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Etat : New. I Review of the Literature.- I Viscosity in General.- I.1 Introduction.- I.2 The Concept of Viscosity: Shear Stress and Shear Rate.- I.3 The Behavior of Viscosity: Newtonian and Non-Newtonian Fluids, Hemodilution and Defibrination.- I.4 The Fahraeus-Iindqui. N° de réf. du vendeur 4881857
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Taschenbuch. Etat : Neu. Druck auf Anfrage Neuware - Printed after ordering - The hemodynamic significance of the flow properties of blood was put into perspective only during the past decade. Advances in modern technologies today allow the quantitative analy sis of the fluidity of blood and its components under conditions approximating the flow in vivo, particularly those in the microcirculation. The hematocrit is the most important of the determinants of blood fluidity (reciprocal value of blood viscosity); acute increases in the hematocrit exert deleterious effects on circulation and oxygen transport owing to impaired fluidity of blood. High viscosity of plasma due to hyper- or dysproteinemias initiates the microcirculatory dysfunctions in hyperviscosity syndromes. Furthermore, the fluidity or deformability of red cells might be critically diminished and therefore cause redistribution of blood elements and adversely affect the resistance to flow within the microvessels. In low flow states blood fluidity most likely becomes the key determinant for microvessel perfu sion, overriding the neural and local metabolic control mechanisms operative at physiological conditions to adjust blood supply to tissue demand. Microcirculatory disturbances are there fore encountered whenever driving pressures are reduced, as in shock or hypotension, and distal to stenoses of macrovessels, but also in hemoconcentration due to plasma volume con traction, polycythemia, leukemia, and dysproteinemia. Based on experimental studies exploring the possibilities and limitations, with regard to improving the fluidity of blood by reducing the hematocrit, the concept of intentional hemo dilution has been introduced to clinical medicine. N° de réf. du vendeur 9783540126201
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Taschenbuch. Etat : Neu. Blood Viscosity and Shock | The Role of Hemodilution, Hemoconcentration and Defibrination | H. Goslinga | Taschenbuch | xxvi | Englisch | 1984 | Springer | EAN 9783540126201 | Verantwortliche Person für die EU: Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg, juergen[dot]hartmann[at]springer[dot]com | Anbieter: preigu. N° de réf. du vendeur 102154433
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Taschenbuch. Etat : Neu. This item is printed on demand - Print on Demand Titel. Neuware -I Review of the Literature.- I Viscosity in General.- II Viscosity in Relation to Cardiac Output, Blood Pressure and Peripheral Resistance.- III The Clinical Significance of Viscosity.- IV Lowering the Viscosity with the Aid of Hemodilution.- V Lowering the Viscosity by Means of Defibrination with the Aid of Arvin.- VI Viscometry.- II Material and Methods.- VII Material and Methods.- VIII Specific Measuring Methods.- III Results.- IX Paper I Effects of Reduction in Viscosity by Means of Hemodilution (Dextran 40) and Defibrination (Arvin) Using a Shock Model with Extracorporeal Circulation.- X Paper II Effects of Viscosity Reduction by Means of Defibrination (Arvin) and Moderate Hemodilution (0.9% NaCl) in a Shock Model with Intact Animals.- XI Paper III Effects of Changes in Viscosity by Means of Defibrination (Arvin) and Changes in Hematocrit (High and Low Ht) Using a Shock Model with Intact Animals.- XII Paper IV Integration of Blood Viscosity into a Clinical Concept.- XIII Paper V Standardization and Automation of the Measurement of Whole Blood Viscosity.- Summary and Conclusions.- General Summing-Up.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 224 pp. Englisch. N° de réf. du vendeur 9783540126201
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