Blood Viscosity And Shock
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Blood Viscosity And Shock
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Author : H. Goslinga
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Blood Viscosity And Shock written by H. Goslinga and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Medical categories.
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.
Blood Viscosity And Shock
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Author : Hieltje Goslinga
language : en
Publisher: Springer
Release Date : 1984-01-01
Blood Viscosity And Shock written by Hieltje Goslinga and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984-01-01 with Blood categories.
The Viscosity Of Blood
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Author : Hieltje Goslinga
language : en
Publisher:
Release Date : 1982
The Viscosity Of Blood written by Hieltje Goslinga and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Blood categories.
Blood Viscosity
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Author : L. Dintenfass
language : en
Publisher: Springer Science & Business Media
Release Date : 1985-03-31
Blood Viscosity written by L. Dintenfass and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985-03-31 with Medical categories.
Microcirculation As Related To Shock
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Author : David Shepro
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Microcirculation As Related To Shock written by David Shepro and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Science categories.
Microcirculation as Related to Shock contains the proceedings of the 1967 Conference on the Microcirculation as Related to Shock held at Boston University. Contributors address reduced blood flow in the microcirculation and microcirculatory hypoperfusion as the focal point of shock. They also review significant progress in shock research, basic cardiovascular physiology, and cognate interdisciplinary fields. This volume is organized into four sections encompassing 26 chapters and begins with an overview of organs and systems involved in shock, including splanchnic circulation, regulatory mechanisms in shock, and microcirculatory studies in hypotension. The next chapters explore the causative factors that produce the state of low blood flow as found in shock, and whether microcirculatory hypoperfusion in humans can be prevented and treated. The book also discusses whether microcirculatory hypoperfusion can be measured in the patient and concludes with an assessment of promising avenues for further research, emphasizing the measurement of blood viscosity, shear stress, and rheological factors as indices of the degree of hypotension. This book is a valuable source of information for physiologists, biologists, and pathologists, as well as those involved in the medical sciences.
Studies On Blood Viscosity At Low Shear Rates
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Author : Magnus I. Gregersen
language : en
Publisher:
Release Date : 1962
Studies On Blood Viscosity At Low Shear Rates written by Magnus I. Gregersen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with categories.
At low shear rates the logarithm of viscosity of heparinized and defibrinated blood obtained from man and dogs shows a linear relationship with the volume per cent of cells. Analyses of such semilog plots indicate that the dependence of plasma viscosity on shear rate can be attributed to the presence of fibrinogen and that the dependence of blood viscosity on volume per cent cells is unaltered by the removal of fibrinogen. Dextran preparations obtained from two different sources have similar effects on blood viscosity which increases in proportion to the molecular weight and the concentration of the dextran used. At a given shear rate and for a given cell percentage, the viscosity of heparinized blood obtained from five species of animals (elephant, man, dog, sheep, goat) shows a direct relationship to the mean corpuscular volume (MCV). Such correlation between viscosity and MCV is less marked in Ringer-washed cell suspensions prepared from the blood of these species. Shrinkage of red cells by washing with a hypertonic solution results in an increase of mean corpuscular hemoglobin concentration (MCHC) and a rise of viscosity. Swelling of red cells by washing with a hypotonic solution causes a decrease of MCHC and a lowering of viscosity. In endotoxin shock, the outward filtration of plasma fluid across capillary walls is accelerated and the concentration of macromolecules in this fluid is also increased.
Sudden Transitory Reduction In The Viscosity Of The Blood As A Cause Of The Fall In Blood Pressure In Shock
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Author : Russell Amos Waud
language : en
Publisher:
Release Date : 1927
Sudden Transitory Reduction In The Viscosity Of The Blood As A Cause Of The Fall In Blood Pressure In Shock written by Russell Amos Waud and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1927 with Anaphylaxis categories.
Cardiovascular Physiology Concepts
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Author : Richard E. Klabunde
language : en
Publisher: Lippincott Connect
Release Date : 2021-03-18
Cardiovascular Physiology Concepts written by Richard E. Klabunde and has been published by Lippincott Connect this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-03-18 with Medical categories.
Praised for its concise coverage, this highly accessible monograph lays a foundation for understanding the underlying concepts of normal cardiovascular function and offers a welcome alternative to a more mechanistically oriented approach or an encyclopedic physiology text. Clear explanations, ample illustrations and engaging clinical cases and problems provide the perfect guidance for self-directed learning and prepare you to excel in clinical practice. Chapter Learning Objectives highlight key concepts at a glance. Problems and Clinical Cases with Answers to Problems reinforce fundamental physiological concepts. Summary of Important Concepts boxes provide bulleted quick-review of essential chapter content. Multiple-choice Review Questions and Answers to Review Questions (with full explanations for each answer choice) enable self-assessment and alert you to areas requiring further study. A chapter on Cardiovascular Integration, Adaptation, and Pathophysiology integrates cardiovascular concepts in the context of normal and clinically relevant conditions.
Shock In Low And High Flow States Proceedings Of A Symposium At Brook Lodge Augusta Michigan U S A June 1 2 And 3 1971
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Author : Bernard K. Forscher
language : en
Publisher:
Release Date : 1972
Shock In Low And High Flow States Proceedings Of A Symposium At Brook Lodge Augusta Michigan U S A June 1 2 And 3 1971 written by Bernard K. Forscher and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Blood flow categories.
Capillary Perfusion In Health And Disease
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Author : Robert M. Hardaway
language : en
Publisher: Wiley-Blackwell
Release Date : 1981
Capillary Perfusion In Health And Disease written by Robert M. Hardaway and has been published by Wiley-Blackwell this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Medical categories.