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Test Code 24NA Sodium, 24hr Urine

Important Note

24-Hour urine volume is required on the request form for processing.

Performing Laboratory

MaineGeneral Medical Center

Reference Values

40-220 mmol/24 hours

Testing may be performed on random urine specimen. Please be aware there are no normal ranges for random urine sodium

Day(s) Test Performed

Monday through Sunday

Specimen Requirements

2 mL from a 24-hour urine collection. No preservative. Mix well before taking 2-mL aliquot. (An entire 24-hour urine collection is also acceptable.) Refrigerate specimen during collection, and send specimen refrigerated in plastic urine container.

 

See “Urine Collection” in “Special Instructions” for 24-hour specimens.

 

Label specimen with patient’s name (first and last), date of birth, date and time of collection, 24-Hour urine volume and the collector’s initials.

 

Specimen stability:  7 days refrigerated at 2-8°C

                                    30 days frozen at ≥-20°C

Minimum volume:    2 mL

 

 

Test Classification and CPT Coding

84300 - sodium

81050 - urine timed measurement (if appropriate)

Special Instructions