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Diagnosis of oliguria and acute kidney injury 

Diagnosis of oliguria and acute kidney injury
Chapter:
Diagnosis of oliguria and acute kidney injury
Author(s):

John A. Kellum

DOI:
10.1093/med/9780199600830.003.0212
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date: 24 July 2021

Diagnosis and classification of acute pathology in the kidney is major clinical problem. Azotemia and oliguria represent not only disease, but also normal responses of the kidney to extracellular volume depletion or a decreased renal blood flow. Clinicians routinely make inferences about both the presence of renal dysfunction and its cause. Pure prerenal physiology is unusual in hospitalized patients and its effects are not necessary benign. Sepsismay alter renal function without the characteristic changes in urine indices. The clinical syndrome known as acute tubular necrosis does not actually manifest the histological changes that the name implies. Acute kidney injury (AKI) is a term proposed to encompass the entire spectrum of the syndrome from minor changes in renal function to a requirement for renal replacement therapy. Criteria based on both changes in serum creatinine and urine output represent a broad international consensus for diagnosing and staging AKI.

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