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Flouride

Specimen Container

Red or Lav

Specimen Preparation

separate < 2hrs

Stability

Ambient Stability: Urine 2 days, Serum 2 days
Refrig Stability: Urine 6 days, Serum 7 days
Frozen Stability: Serum 3 months, Urine 6 months

Preferred Transportation Temperature

REFRIGERATED

Performed

Sun-Sat

Reported

Same day

Methodology

Sodium: Ion Selective Electrode
Creatinine: Enzymatic

Lab Department

Core

Testing Location

IHC

Synonyms

Fractional Excretion of Sodium

Test OR Panel

Test

Unit of Measurement

mg/L

CPT Codes

84300

LOINC

5649-9

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