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Fractional Excretion of Urea (FEUrea)

 

Input
 

Urine Urea		mg/dL mmol/L
Serum Urea		mg/dL mmol/L
Urine Cr		mcmol/L mg/dL mg/mL mmol/L
Serum Cr		mcmol/L mg/dL mmol/L

 
Result
 
Important: Inputs must be complete to perform calculation.

 

FE Urea		% fraction percent rate ratio
Decimal Precision   0 1 2 3

 

Data action

 
     
 
Include literature references: Yes   No

 

 

 
Equations used
 

FEUrea = (UrineUrea / SerumUrea) / (UrineCr / SerumCr) * 100

 

 

References

1. Kaplan AA, Kohn OF. Fractional excretion of urea as a guide to renal dysfunction. Am J Nephrol. 1992;12(1-2):49-54. PubMed ID: 1415365

 

Associated Medical Subject Headings [MeSH]
 

Chemical Fractionation,   Follow-Up Studies,   Humans,   Kidney Diseases,   Prospective Studies,   Renal Circulation,   Retrospective Studies,   Sodium,   Urea

 

Associated Logical Observation Identifiers Names and Codes [LOINC]
 

Parameter	LOINC's and Suggested Units
Urine Urea	3095-7 : mg/dL      3092-4 : mg/dL      14938-5 : mmol/L      22700-9 : mmol/L
Serum Urea	3094-0 : mg/dL      6299-2 : mg/dL      14937-7 : mmol/L      59570-2 : mmol/L
Urine Cr	35674-1 : mg/dL      2161-8 : mg/dL      14683-7 : mmol/L
Serum Cr	2160-0 : mg/dL      38483-4 : mg/dL      14682-9 : mcmol/L      22726-4 : mcmol/L      59826-8 : mcmol/L

 
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