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Fractional Excretion of Sodium

Specimen Container

1 Gold (SST) AND urine with no preservatives

Specimen Collection Type

Serum and Urine

Minimum Volume To Collect (Ml)

1 mL blood AND 2 mL urine

Pediatric Volume To Collect (Ml)

1 mL blood AND 2 mL urine

Stability

Ambient Stability: Urine 2 days, Serum 2 days
Refrig Stability: Refridgerated: Urine 6 days, Serum or Plasma 7 days
Frozen Stability: Unable

Unacceptable Conditions

Urine 6 months, Serum/plasma 3 months

Preferred Transportation Temperature

REFRIGERATED

Performed

Sun-Sat

Reported

Same day

Methodology

Sodium: Ion Selective Electrode

Lab Department

Core

Testing Location

IHC

Synonyms

Fractional Excretion of Sodium

Test OR Panel

Test

Misc Instructions

COLLECTION!
Collect blood and urine at the same time, ideally within 30 minutes of each other (may be up to 4 hours apart if patient is normally hydrated)

CPT Codes

84300

LOINC

49135-7

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