H. Goslinga Blood Viscosity and Shock 9783540126201

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Автор: H. Goslinga
Название: Blood Viscosity and Shock
ISBN: 9783540126201
Издательство: Springer
Классификация:

Гематология

Обезболивающие средства

Неотложная помощь и медицина катастроф

Реанимация и интенсивная терапия

ISBN-10: 3540126201
Обложка/Формат: Paperback
Страницы: 196
Вес: 0.36 кг.
Дата издания: 01.04.1984
Серия: Anaesthesiologie und Intensivmedizin Anaesthesiology and Intensive Care Medicine
Язык: English
Размер: 244 x 170 x 12
Основная тема: Medicine & Public Health
Подзаголовок: The Role of Hemodilution, Hemoconcentration and Defibrination
Ссылка на Издательство: Link
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Поставляется из: Германии
Описание: 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, H. Goslinga