ARUP's Laboratory Test Directory

Sodium, Urine : 0020851

Mnemonic: U NA

Methodology: Quantitative Ion-Selective Electrode
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect: 24-hour urine with no additive. Refrigerate during collection. Also acceptable: Random urine.

Specimen Preparation: Transport 1 mL aliquot of urine from a well-mixed collection. (Min: 0.2 mL) Record total volume and collection time interval on transport tube and test request form.

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: pH adjusted urine specimens.

Stability (collection to initiation of testing): Ambient: 8 hours; Refrigerated: 1 week; Frozen: 3 months
Reference Interval:
 
Test Number Component Reference Interval
 Sodium, Urine 51-286 mmol/d
0020473Creatinine, 24-Hour Urine  
 
Age Male Female
3-8 years 140-700 mg/d 140-700 mg/d
9-12 years 300-1300 mg/d 300-1300 mg/d
13-17 years 500-2300 mg/d 400-1600 mg/d
18-50 years 1000-2500 mg/d 700-1600 mg/d
51-80 years 800-2100 mg/d 500-1400 mg/d
81 years and older 600-2000 mg/d 400-1300 mg/d

CPT Code(s): 84300