The Fractional Excretion of Sodium (FENa) determines if renal failure is due to pre-renal, intrinsic, or post-renal pathology.

Low fractional excretion indicates sodium retention by the kidney, suggesting pathophysiology extrinsic to the urinary system such as volume depletion or decrease in effective circulating …

2024年10月30日 · The fractional excretion of sodium (FENa) measures the percent of filtered sodium that is excreted in the urine. This calculation is used to help differentiate prerenal …

FENa has traditionally been considered as lacking validity in patients on diuretics. In this study, FENa (>1%) had a specificity of just 54% in detecting intrinsic kidney injury. However, it is …

The FENa test is highly effective in diagnosing prerenal azotemia. A FENa value below 1% indicates that the kidneys are conserving sodium in response to reduced blood flow, which is …

FeNa is useful for the classification of AKI, as pre-renal failure volume depletion causes a maximal stimulus for salt retention and hence a low FeNa. In other clinical situations, however, …

FENa was 0.4% to 0.8%, considerably lower than FENa's measured in eight nonvolume-depleted patients in acute renal failure. Vigorous intravenous fluid therapy in this patient produced a …

2008年10月24日 · To evaluate the mechanisms for a low fractional excretion of Na (FENa ≤ 1.0) in acute renal failure (ARF) of a sustained nature, causes were determined independent of …

2012年9月5日 · In plain-speak, the FENa, or fractional excretion of sodium, is the amount of sodium excreted in the urine out of all the sodium filtered at the glomerulus. It seems like the …

2023年12月31日 · FENa of lower than 1% indicates decreased blood flow to the kidney. This can occur with kidney damage due to dehydration or heart failure. FENa higher than 1% suggests …