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  Fractional Excretion of Urea (FEUrea)

Urine Urea  
Serum Urea  
Urine Cr  
Serum Cr  

FE Urea  
Decimal Precision  

Include literature references: Yes   No

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


  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 PubMed Logo

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      

This material contains content from LOINC® (http://loinc.org). The LOINC table, LOINC codes, and LOINC panels and forms file are copyright © 1995-2014, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and available at no cost under the license at http://loinc.org/terms-of-use.

Associated ICD10-CM Codes
   N17.2Acute kidney failure with medullary necrosis
   N19Unspecified kidney failure
   N25.9Disorder resulting from impaired renal tubular function, unspecified
   N17.9Acute kidney failure, unspecified

Associated ICD9-CM Codes
   584.9Acute renal failure nos
   588.8Impaired renal funct nec
   588.9Impaired renal funct nos
   586Renal failure nos
   583.7Nephr nos/medull necros

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