Abstract
INTRODUCTION. Oxygen, discovered in the XVIII century, is not only a necessary chemical element for the normal functioning of cells and the maintenance of life, but also an important component of the treatment of a wide range of critical conditions occurring with various variants of acute respiratory failure underlying the development of multiple organ failure. The use of oxygen in medicine is an indispensable tool in various critical situations. OBJECTIVES. To highlight in the review the predominantly toxic effects of oxygen, as well as existing data from experimental and fundamental studies on the potentiation role of hyperoxia in the processes of activation of free radical oxidation, leading to excessive synthesis of reactive oxygen species, which, in turn, are a leading factor in the pathogenesis of any critical condition always associated with hypoxia. MATERIALS AND METHODS. The review presents data from experimental studies, meta-analyses, randomized clinical trials that reflect the contribution of hyperoxia to the mortality rates of patients of intensive care units in a wide range of critical conditions. CONCLUSIONS. Maintaining tissue oxygenation by titrating oxygen concentrations to target pO2 and SpO2 levels against the background of constant monitoring of gas exchange parameters will avoid manifestations of toxic effects of oxygen (hyperoxia) in conditions of intensive care of critical conditions.
References
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