An Introduction To Microcirculation

Author : M.P. Wiedeman
Publisher : Elsevier
Page : 238 pages
File Size : 51,9 Mb
Release : 2012-12-02
Category : Medical
ISBN : 9780323159463

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An Introduction to Microcirculation by M.P. Wiedeman Pdf

An Introduction to Microcirculation is written in response to the need for a book containing the most basic information about microcirculation. The book aims to consolidate information gained from the numerous vascular beds that have been used for in vivo microscopic observations, to note the similarities and differences in architecture and function, to reveal the origin of certain terms and concepts, and to discuss hemodynamics of the micro vessels. The book is divided into three parts. Part 1 covers a historical introduction to the study; general anatomical comparisons; the microvasculature of specific organs and tissues; and methods of preparation of tissues for microscopic observation. Part 2 discusses factors that are involved in this process and the exchange in the microcirculation. Part 3 explores the hemodynamics in the microcirculation and quantitative techniques for measurement of velocity and blood pressure. The text is for medical students, graduate students, clinicians, and young investigators who wish to have a greater knowledge on microcirculation and the concepts behind it.

Author : Mary P. Wiedeman,Ronald Franklin Tuma,Harvey Norman Mayrovitz
Publisher : Unknown
Page : 226 pages
File Size : 41,6 Mb
Release : 1981-01-01
Category : Microcirculation
ISBN : 0127493506

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An Introduction to Microcirculation by Mary P. Wiedeman,Ronald Franklin Tuma,Harvey Norman Mayrovitz Pdf

An Introduction to Microcirculation...

Author : Roland N. Pittman
Publisher : Biota Publishing
Page : 117 pages
File Size : 55,5 Mb
Release : 2016-08-18
Category : Medical
ISBN : 9781615047215

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Regulation of Tissue Oxygenation, Second Edition by Roland N. Pittman Pdf

This presentation describes various aspects of the regulation of tissue oxygenation, including the roles of the circulatory system, respiratory system, and blood, the carrier of oxygen within these components of the cardiorespiratory system. The respiratory system takes oxygen from the atmosphere and transports it by diffusion from the air in the alveoli to the blood flowing through the pulmonary capillaries. The cardiovascular system then moves the oxygenated blood from the heart to the microcirculation of the various organs by convection, where oxygen is released from hemoglobin in the red blood cells and moves to the parenchymal cells of each tissue by diffusion. Oxygen that has diffused into cells is then utilized in the mitochondria to produce adenosine triphosphate (ATP), the energy currency of all cells. The mitochondria are able to produce ATP until the oxygen tension or PO2 on the cell surface falls to a critical level of about 4–5 mm Hg. Thus, in order to meet the energetic needs of cells, it is important to maintain a continuous supply of oxygen to the mitochondria at or above the critical PO2 . In order to accomplish this desired outcome, the cardiorespiratory system, including the blood, must be capable of regulation to ensure survival of all tissues under a wide range of circumstances. The purpose of this presentation is to provide basic information about the operation and regulation of the cardiovascular and respiratory systems, as well as the properties of the blood and parenchymal cells, so that a fundamental understanding of the regulation of tissue oxygenation is achieved.

Author : D. Neil Granger,Elena Senchenkova
Publisher : Morgan & Claypool Publishers
Page : 99 pages
File Size : 43,7 Mb
Release : 2010
Category : Medical
ISBN : 9781615041657

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Inflammation and the Microcirculation by D. Neil Granger,Elena Senchenkova Pdf

The microcirculation is highly responsive to, and a vital participant in, the inflammatory response. All segments of the microvasculature (arterioles, capillaries, and venules) exhibit characteristic phenotypic changes during inflammation that appear to be directed toward enhancing the delivery of inflammatory cells to the injured/infected tissue, isolating the region from healthy tissue and the systemic circulation, and setting the stage for tissue repair and regeneration. The best characterized responses of the microcirculation to inflammation include impaired vasomotor function, reduced capillary perfusion, adhesion of leukocytes and platelets, activation of the coagulation cascade, and enhanced thrombosis, increased vascular permeability, and an increase in the rate of proliferation of blood and lymphatic vessels. A variety of cells that normally circulate in blood (leukocytes, platelets) or reside within the vessel wall (endothelial cells, pericytes) or in the perivascular space (mast cells, macrophages) are activated in response to inflammation. The activation products and chemical mediators released from these cells act through different well-characterized signaling pathways to induce the phenotypic changes in microvessel function that accompany inflammation. Drugs that target a specific microvascular response to inflammation, such as leukocyte-endothelial cell adhesion or angiogenesis, have shown promise in both the preclinical and clinical studies of inflammatory disease. Future research efforts in this area will likely identify new avenues for therapeutic intervention in inflammation. Table of Contents: Introduction / Historical Perspectives / Anatomical Considerations / Impaired Vasomotor Responses / Capillary Perfusion / Angiogenesis / Leukocyte-Endothelial Cell Adhesion / Platelet-Vessel Wall Interactions / Coagulation and Thrombosis / Endothelial Barrier Dysfunction / Epilogue / References

Author : David Rubenstein,Wei Yin,Mary D. Frame
Publisher : Academic Press
Page : 410 pages
File Size : 52,6 Mb
Release : 2011-11-02
Category : Science
ISBN : 9780123813848

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Biofluid Mechanics by David Rubenstein,Wei Yin,Mary D. Frame Pdf

Both broad and deep in coverage, Rubenstein shows that fluid mechanics principles can be applied not only to blood circulation, but also to air flow through the lungs, joint lubrication, intraocular fluid movement and renal transport. Each section initiates discussion with governing equations, derives the state equations and then shows examples of their usage. Clinical applications, extensive worked examples, and numerous end of chapter problems clearly show the applications of fluid mechanics to biomedical engineering situations. A section on experimental techniques provides a springboard for future research efforts in the subject area. Uses language and math that is appropriate and conducive for undergraduate learning, containing many worked examples and end of chapter problems All engineering concepts and equations are developed within a biological context Covers topics in the traditional biofluids curriculum, as well as addressing other systems in the body that can be described by biofluid mechanics principles, such as air flow through the lungs, joint lubrication, intraocular fluid movement, and renal transport Clinical applications are discussed throughout the book, providing practical applications for the concepts discussed.

Author : Ronald F. Tuma,Walter N. Duran,Klaus Ley
Publisher : Academic Press
Page : 1000 pages
File Size : 54,5 Mb
Release : 2011-04-28
Category : Science
ISBN : 0080569935

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Microcirculation by Ronald F. Tuma,Walter N. Duran,Klaus Ley Pdf

This reference is a volume in the Handbook of Physiology, co-published with The American Physiological Society. Growth in knowledge about the microcirculation has been explosive with the field becoming fragmented into numerous subdisciplines and subspecialties. This volume pulls all of the critical information into one volume. Meticulously edited and reviewed. Benefit: Provides investigators a unique tool to explore the significance of their findings in the context of other aspects of the microcirculation. In this way, the updated edition has a direct role in helping to develop new pathways of research and scholarship Highlights the explosive growth in knowledge about the microcirculation including the biology of nitric oxide synthase (NOS), endothelial cell signaling, angiogenesis, cell adhesion molecules, lymphocyte trafficking, ion channels and receptors, and propagated vasomotor responses. Benefit: Microcirculatory biology has become fragmented into numerous sub-disciplines and subspecialties, and these reference reintegrates the information in one volume

Author : Nicholas A. Mortillaro,Aubrey E. Taylor
Publisher : CRC Press
Page : 174 pages
File Size : 51,8 Mb
Release : 1994-02-28
Category : Medical
ISBN : 0849345472

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The Pathophysiology of the Microcirculation by Nicholas A. Mortillaro,Aubrey E. Taylor Pdf

This book is devoted to the pathophysiology of the microcirculation, an intensely studied area of the circulatory system. Featuring contributions from 29 top investigators in the field, the book begins with an introduction to the general structure of the normal microvascular system, with special emphasis on the characteristics of blood vessel segments collectively comprising the system. Significant areas covered in the book include angiogenesis, neoplasias, hypertension, shock, ischemia/reperfusion, diabetes, immunologic injury, and thermal injury. It also covers the effects of aging and environmental factors on the microcirculation-topics not often examined in depth. More than 80 figures and tables illustrate key concepts throughout the book.

Author : C. G. Caro
Publisher : Cambridge University Press
Page : 551 pages
File Size : 52,8 Mb
Release : 2012
Category : Mathematics
ISBN : 9780521151771

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The Mechanics of the Circulation by C. G. Caro Pdf

This classic book outlines the anatomy and physiology of the circulation and explains the mechanical principles that govern it.

Author : Marilyn J. Cipolla
Publisher : Biota Publishing
Page : 82 pages
File Size : 45,6 Mb
Release : 2016-07-28
Category : Medical
ISBN : 9781615047239

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The Cerebral Circulation by Marilyn J. Cipolla Pdf

This e-book will review special features of the cerebral circulation and how they contribute to the physiology of the brain. It describes structural and functional properties of the cerebral circulation that are unique to the brain, an organ with high metabolic demands and the need for tight water and ion homeostasis. Autoregulation is pronounced in the brain, with myogenic, metabolic and neurogenic mechanisms contributing to maintain relatively constant blood flow during both increases and decreases in pressure. In addition, unlike peripheral organs where the majority of vascular resistance resides in small arteries and arterioles, large extracranial and intracranial arteries contribute significantly to vascular resistance in the brain. The prominent role of large arteries in cerebrovascular resistance helps maintain blood flow and protect downstream vessels during changes in perfusion pressure. The cerebral endothelium is also unique in that its barrier properties are in some way more like epithelium than endothelium in the periphery. The cerebral endothelium, known as the blood-brain barrier, has specialized tight junctions that do not allow ions to pass freely and has very low hydraulic conductivity and transcellular transport. This special configuration modifies Starling's forces in the brain microcirculation such that ions retained in the vascular lumen oppose water movement due to hydrostatic pressure. Tight water regulation is necessary in the brain because it has limited capacity for expansion within the skull. Increased intracranial pressure due to vasogenic edema can cause severe neurologic complications and death.

Author : Javier Escaned,Justin Davies
Publisher : Springer
Page : 313 pages
File Size : 40,6 Mb
Release : 2017-08-10
Category : Medical
ISBN : 9781447152453

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Physiological Assessment of Coronary Stenoses and the Microcirculation by Javier Escaned,Justin Davies Pdf

​Since the introduction of coronary angiography, a key technique in understanding coronary artery disease, a number of paradigms regarding its study and interpretation have taken place. Following an emphasis on improved angiographic and subsequent intracoronary imaging techniques, functional assessment of coronary circulation has demonstrated to have major implications for diagnosis and treatment of coronary artery disease. Fractional flow reserve, a pressure derived index of stenosis severity, constitutes the best example of the current importance of physiological assessment in clinical practice. However, the acceptance of FFR by cardiologists contrasts with important voids in knowledge on the basic principles of coronary physiology and of other available techniques that, as an alternative to FFR, allow a more comprehensive assessment of coronary circulation. This is particularly noticeable in the assessment of microcirculation, an unavoidable compartment of coronary circulation that is frequently affected in acute coronary syndromes of in the presence of cardiovascular risk factors or non-coronary heart disease. A deeper understanding of the relationship between epicardial vessel and microcirculatory involvement has started with the advent of newer imaging techniques like invasive optical coherence tomography, and non-invasive CT and NMR techniques. This book aims to be an indispensable tool for clinicians and researches in the field of coronary artery disease. It provides a balanced, comprehensive review of anatomy, physiology and available techniques, discusses both the diagnosis of epicardial vessel and microcirculatory disease, the impact of different diseases at different levels of coronary circulation, and the best way to address a separate or combined assessment of different levels of coronary circulation. ​

Author : Peter R. Kvietys
Publisher : Morgan & Claypool Publishers
Page : 127 pages
File Size : 45,6 Mb
Release : 2010
Category : Medical
ISBN : 9781615041176

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The Gastrointestinal Circulation by Peter R. Kvietys Pdf

The microcirculation of the gastrointestinal tract is under the control of both myogenic and metabolic regulatory systems. The myogenic mechanism contributes to basal vascular tone and the regulation of transmural pressure, while the metabolic mechanism is responsible for maintaining an appropriate balance between O2 demand and O2 delivery. In the postprandial state, hydrolytic products of food digestion elicit a hyperemia, which serves to meet the increased O2 demand of nutrient assimilation. Metabolically linked factors (e.g., tissue pO2, adenosine) are primarily responsible for this functional hyperemia. The fenestrated capillaries of the gastrointestinal mucosa are relatively permeable to small hydrolytic products of food digestion (e.g., glucose), yet restrict the transcapillary movement of larger molecules (e.g., albumin). This allows for the absorption of hydrolytic products of food digestion without compromising the oncotic pressure gradient governing transcapillary fluid movement and edema formation. The gastrointestinal microcirculation is also an important component of the mucosal defense system whose function is to prevent (and rapidly repair) inadvertent epithelial injury by potentially noxious constituents of chyme. Two pathological conditions in which the gastrointestinal circulation plays an important role are ischemia/reperfusion and chronic portal hypertension. Ischemia/reperfusion results in mucosal edema and disruption of the epithelium due, in part, to an inflammatory response (e.g., increase in capillary permeability to macromolecules and neutrophil infiltration). Chronic portal hypertension results in an increase in gastrointestinal blood flow due to an imbalance in vasodilator and vasoconstrictor influences on the microcirculation. Table of Contents: Introduction / Anatomy / Regulation of Vascular Tone and Oxygenation / Extrinsic Vasoregulation: Neural and Humoral / Postprandial Hyperemia / Transcapillary Solute Exchange / Transcapillary Fluid Exchange / Interaction of Capillary and Interstitial Forces / Gastrointestinal Circulation and Mucosal Defense / Gastrointestinal Circulation and Mucosal Pathology I: Ischemia/Reperfusion / Gastrointestinal Circulation and Mucosal Pathology II: Chronic Portal Hypertension / Summary and Conclusions / References / Author Biography

Author : Helena Lenasi
Publisher : BoD – Books on Demand
Page : 288 pages
File Size : 46,8 Mb
Release : 2016-10-26
Category : Medical
ISBN : 9789535127307

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Microcirculation Revisited by Helena Lenasi Pdf

The book provides a comprehensive overview of selected topics in microcirculation, from physiology to pathophysiology including molecular mechanisms and clinical aspects. It contains 10 chapters written by reputed authors, which comprehensively sum up the current knowledge and some interesting new insights in the field of microcirculation. It will be useful to a broad range of audience, from students to highly profiled experts, helping them to expand their knowledge on microcirculation and opening up additional questions for further investigation.

Author : Frithjof Hammersen,K. Messmer
Publisher : Unknown
Page : 120 pages
File Size : 52,8 Mb
Release : 1990
Category : Medical
ISBN : UOM:39015017752976

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Cerebral Microcirculation by Frithjof Hammersen,K. Messmer Pdf

Author : Geert W. Schmid-Schönbein,D.Neil Granger
Publisher : Springer Science & Business Media
Page : 610 pages
File Size : 43,9 Mb
Release : 2013-04-17
Category : Medical
ISBN : 9782817807614

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Molecular Basis for Microcirculatory Disorders by Geert W. Schmid-Schönbein,D.Neil Granger Pdf

A large number of cardiovascular diseases are accompanied by inflammation. This volume on the molecular basis of microcirculatory disorders gives a comprehensive summary of key steps in the inflammatory cascade. Leading investigators present a state-of-the-art analysis of the molecular determinants of leukocyte-endothelial cell adhesion, mechanotransduction in endothelial and inflammatory cells, mechanisms of cell activation, microvascular apoptosis with applications to ischemia-reperfusion in the brain, the heart and in venous disease, diabetes and hypertension. The book provides the latest thinking in these important cardiovascular problems, with the most contemporary literature and a look at the increasingly complex events during inflammation. Molecular biology tools, microvascular and modern bioengineering analysis are seamlessly integrated into the analysis of clinical problems. The book helps not only newcomers to gain entry into the interesting problems associated with microvascular disorders, but lays the foundation for the design of new therapeutic interventions.

Author : Abraham Noordergraaf
Publisher : Elsevier
Page : 368 pages
File Size : 50,8 Mb
Release : 2012-12-02
Category : Nature
ISBN : 9780323141413

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Circulatory System Dynamics by Abraham Noordergraaf Pdf

Circulatory System Dynamics reviews cardiovascular dynamics from the analytical viewpoint and indicates ways in which the accumulated knowledge can be expanded and applied to further enhance understanding of the normal mammalian circulation, to ascertain the nature of difficulties associated with disease, and to test the effect of treatment. Comprised of 10 chapters, this volume begins with an overview of the circulatory system, including its anatomy and the trigger for myocardial (heart muscle) contraction. The discussion then turns to measurement of blood pressure using invasive and non-invasive techniques; blood flow measurement, with emphasis on cardiac output and measurement in the microcirculation; the system and pulmonary arterial trees; and pulsatile pressure and flow in pulmonary veins. Subsequent chapters explore microcirculation and the anatomy of the microvasculature; the heart and coronary circulation, paying particular attention to the Frank-Starling mechanism and indices of myocardial "contractility"; and control of blood pressure, peripheral resistance, and cerebral flow. The last two chapters deal with circulatory assistance and the closed cardiovascular system. This book will be of interest to students, practitioners, and researchers in fields ranging from physiology and biology to biochemistry and biophysics.