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Liver and kidney dysfunction in critically ill patients. Support options and compensation functions
Kroužecký, Aleš ; Matějovič, Martin (advisor) ; Chytra, Ivan (referee) ; Viklický, Ondřej (referee) ; Dostál, Pavel (referee)
22 23 7. Summary The liver and kidney are an important organs involved in a number of biosynthetic, biotransformative, detoxifying, endocrine and immune processes and therefore it is understandable that its dysfunction is associated with adverse outcome of critically ill patients. Hepatic and renal dysfunctions in critical illness are relatively common and occur usually as a component of multiple organ dysfunction syndrome (MODS). Several mechanisms have been proposed to explain the development of MODS. Among these, 1) the hypoxic component resulted from an inadequate oxygen supply to tissues, and 2) cytotoxic effects of various mediators are believed the key elements in the pathophysiology of MODS. From these complex causes of injury are probably the most therapeutically attainable the hemodynamic disturbances and maintenance of adequate organ perfusion pressure using vasopressors is one of the cornerstones of treatment of critically ill patients. Blood flow through organs is autoregulated over a wide range of mean arterial pressure (MAP). There is an agreement that under physiological conditions minimum value of MAP necessary to ensure this autoregulation is about 60- 65 mm Hg. Therefore MAP > 65 mmHg has been recommended as a goal for the vasopressor therapy in sepsis. In critical condition, however,...

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