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Exudate is an inflammatory extravascular effusion. It has a higher specific gravity than transudate (the stated limit is 1018 kg / m3 ) and a higher protein concentration (more than 30 g / l).

It is formed in tissues or in body cavities (joint effusion, ascites , hydrothorax, etc.) by the process of exudation- the passage of water, proteins, or even cellular components through the capillary wall. During inflammation , the capillaries are dilated, peristatic hyperemia occurs and their wall permeability increases (by increasing the spacing between endothelial cells ). Exudate, resp. transudate is the basis of inflammatory edema .

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  • POVÝŠIL, Ctibor – ŠTEINER, Ivo, et al. Obecná patologie. 1. edition. Galén, 2011. ISBN 978-80-7262-773-8.