Pathophysiology, Evaluation, and Management of Metabolic Alkalosis

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2021-01-21
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American English
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Cureus
Abstract

Metabolic alkalosis is an increase in blood pH to >7.45 due to a primary increase in serum bicarbonate (HCO3−). Metabolic alkalosis results from alkali accumulation or acid loss, and it is associated with a secondary increase in carbon dioxide arterial pressure (PaCO2). Metabolic alkalosis is a common acid-base disorder, especially in critically ill patients. The pathogenesis of chronic metabolic alkalosis includes two derangements, generation of metabolic alkalosis via gain of alkali or loss of acid and maintenance of metabolic alkalosis by increased tubular HCO3− reabsorption (failure of the kidneys to excrete excess alkali). Metabolic alkalosis is the most common acid-base disorder in hospitalized patients, particularly in the surgical critical care unit. Mortality increases as pH increases.

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Tinawi M. Pathophysiology, Evaluation, and Management of Metabolic Alkalosis. Cureus. 2021;13(1):e12841. Published 2021 Jan 21. doi:10.7759/cureus.12841
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