Comparative hemorheology, in Handbook of Hemorheology and Hemodynamics, eds. O. K. Baskurt, M. R. Hardeman, M. W. Rampling, and. Article · January. Handbook of Hemorheology and Hemodynamics – Ebook download as PDF File .pdf), Text File .txt) or read book online. significantly contribute to hemorheological variations in diseases and in certain extreme physiological properties. KEYWORDS: Hemorheology, hemodynamics, viscosity, erythrocyte deformability, Handbook of Engineering. New York.
|Published (Last):||11 January 2014|
|PDF File Size:||6.16 Mb|
|ePub File Size:||8.32 Mb|
|Price:||Free* [*Free Regsitration Required]|
A related subject, the damage sustained by red cells due to flow-induced mechanical trauma, is also presented. If perfusion pressures are reduced e. Because of the importance of the mechanical properties of resting and activated leukocytes in the physiology and pathology of the microcirculation, they have been widely studied heomrheology rheological techniques.
IOS Press Ebooks – Handbook of Hemorheology and Hemodynamics
Even moderate hemolysis, which is not an immediate threat to renal function, is an important warning sign of other potential blood cell damage such as platelet activation, white blood cell WBC dysfunction, and other serious complications such as scavenging of nitric oxide , damage to glycocalyx and endothelial cells, and impairment of the vascular smooth muscle tone .
Flow-based studies have revealed that in each case, leukocytes and platelets use a multi-step process to achieve controlled recruitment [2, 3].
Read, highlight, and take notes, across web, tablet, and phone. The following paragraphs describe how hemorheology interferes with the production of endothelial autacoids, how the endothelium functions, and how it influences vascular flow and hemorheology. The linkage between the in vitro and in vivo research described hmeodynamics the book will be of interest to both basic science and clinical investigators.
The differences between apparent viscosity values measured in vivo and ex vivo were more prominent at higher hematocrit values . For in vitro studies of flow handbokk single tubes or networks, it is rather straightforward to define and measure such parameters e.
It has become increasingly recognized that adhesion is constrained by the local hemodynamic environment and modulated by the rheological properties of the blood. Rampling Limited preview – Abstract The hemodynmaics that determine the rheological behavior of blood, a two-phase fluid, include the relative volume of each phase as reflected by the hematocrit value, plasma composition and the properties of cellular elements.
This publication is not primarily famous for this description of the shear rate dependence of blood viscosity, but rather because it pointed out that measurements of blood viscosity in cylindrical tubes could not be used to predict its effects on in vivo blood flow . This approach for calculating apparent viscosity using pressure handnook and flow rate data measured in vivo has been used by other investigators under various conditions and in different experimental settings [2, 3].
Such transfusions are given in response to severe anemia, significant hemodynamiics loss, or as therapy e. Conversely, RBC agglutination and blood coagulation are irreversible processes due to either protein handdbook or strong antigen-antibody attractive forces. In selecting topics for this handbook the editors have attempted to provide a general overview of both basic science and clinical hemorheology and hemodynamics.
Hemodynxmics it wasn’t until almost a century later that physiologists began to methodically explore the resistance to flow within the microcirculation proper using techniques of intravital microscopy.
This borderline oxygen supply makes the fetus extremely vulnerable to hypoxicischemic events. Handbook of Hemorheology and Hemodynamics Oguz K. The experiments underlying this formulation were conducted using simple fluids and the viscosity concept was introduced in the equation as a constant, being directly proportional to flow resistance.
In blood, fibrinogen is one of the most important determinants of blood viscosity due to its strong tendency to increase both plasma viscosity and RBC aggregation . Abnormal increases of RBC aggregation have been observed in several diseases associated with vascular disorders e. Handbook of Hemorheology and Hemodynamics loading In this chapter, we review the structure-function relationships that determine the mechanical and adhesive properties of RBC and describe some techniques and methods, old and new, for quantifying these important rheological properties.
The specific mechanisms underlying adhesion in the vascular system are then described for the different cells, and the major physico-chemical modulators of adhesion are outlined. What is more, many of those hemodynamiics studies were of physical properties of blood that have direct hemorheological relevance. As with the bridging model, disaggregation forces are electrostatic repulsion, membrane strain and mechanical shearing. This latter sublethal RBC mechanical damage causes ot shortening of RBC life span, a decrease in density of functioning capillaries and area of contact surface of RBC with capillary walls, and may lead to anemia, tissue hypoxia and other complications.
Hemodynamcis a number of disorders affecting the mechanical and adhesive properties of human RBC, aand sickle hemodynamicw disease and malaria are arguably bemodynamics most important and certainly, in the case of malaria, the most studied. However, the specific mechanisms involved in RBC aggregation have not yet been elucidated, and thus it is not yet possible to fully understand the relations between pathology and altered RBC aggregation.
The function of blood is to feed all the tissues of the body with vital materials and to remove waste.
Ebook: Handbook of Hemorheology and Hemodynamics
The linkage between the in vitro and in vivo research described in the book will be of interest to both basic science and clinical investigators. Here we review the theoretical and experimental analyses of leukocyte deformation, and the structural elements that influence the cellular rheology.
In addition, the in vivo flow dynamics and flow resistance of blood are influenced by RBC aggregation . The development of the fetus, the transition and adaptation at birth, and the subsequent maturation during infancy and childhood require considerable adaptation processes of the macro- and microcirculation. This body of research has revealed that blood trauma is related to non-physiological flow conditions such as elevated shear forces, turbulence, cavitation, prolonged hemorheoloyg and collision between blood cells and foreign surfaces.
Leblond in an early, textbook of hemorheology, hyperviscosity syndromes were discussed from a pathophysiological point of hemodynxmics : Also dealt with in some depth are the effects of diseases on the mechanical and adhesive properties of red cells and the underlying molecular mechanisms, particularly those found in malaria.