Oliguria, volume overload, and loop diuretics

Abstract

Acute kidney injury (AKI) is commonly and increasingly encountered in patients with critical illness. In the past, epidemiologic studies have consistently found that oliguria further increases the risk of death from AKI. Compared with patients outside the intensive care unit (ICU), critically ill patients are more likely to have volume overload as a result of impaired solute and water excretion. Recently, broad changes have occurred in ICU practice, such as early goal-directed therapy in sepsis, which may further compound volume overload in the ICU patient with oliguric AKI. Evidence has also emerged to suggest that a positive fluid accumulation in ICU patients can unfavorably affect outcome..