49135-7LOINC 2.82
Fractional excretion of sodium [Ratio] in Urine and Serum or Plasma
Fract excret Na Ur+SerPl-Rto
Definition
- The fractional excretion of sodium is calculated as follows, where the asterisk is being used to indicate multiplication: 100 * (urine Na * plasma creatinine)/(plasma Na * urine creatinine). Fractional excretion of sodium is used to try to distinguish pre-renal azotemia (FE Na <1% ) from m actute tubular necrosis (FE Na > 1%) and post renal azotemia (FE Na > 4%).
Component
- Fractional excretion of sodium
Specimen / system
- Urine+Ser/Plas
Class
- CHEM
Property
- Ratio
Scale
- Qn
Related names
- Chemistry; FE Na; FENa; Fract excret Na; Na; Na+; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Ratios; Rto; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; UA; UR; Ur+SerPl; Urn
Index terms
- Chemistry
- FE Na
- FENa
- Fract excret Na
- Na
- Na+
- Pl
- Plasma
- Plsm
- Point in time
- QNT
- Quan
- Quant
- Quantitative
- Random
- Ratios
- Rto
- SerP
- SerPl
- SerPlas
- Serum
- Serum or plasma
- SR
- UA
- UR
- Ur+SerPl
- Urn