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Sodium Fractional Excretion, Urine
MessagePerforming Lab: Lakeview, Regions, Westfields
Test Code
4793
Alias/See Also
Sunquest: FENAU; FENA testing, Urine specimen collection
CPT Codes
84300; 82570
Includes
Sodium, Urine; Creatinine, Urine
Preferred Specimen
0.2 mL Random Urine
Minimum Volume
0.1 mL
Instructions
Ordering:
Ensure plasma specimen is collected (FENA)
Collection:
No preservative required
Ensure plasma specimen is collected (FENA)
Collection:
No preservative required
Transport Container
Sterile Container
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature: 24 hours
Refrigerated: 5 days
Frozen: 6 months
Refrigerated: 5 days
Frozen: 6 months
Methodology
Sodium: Potentiometric
Creatinine: Two-Point Rate
Setup Schedule
Daily
Report Available
Same Day
Reference Range
See indivudal tests for reference range
Clinical Significance
Evaluate suspected renal diseases that affect sodium clearance.
