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NA24
SODIUM, 24-HOUR URINE

Test Code NA24 
Test SODIUM, 24-HOUR URINE 
Methodology Ion-Selective Electrode (ISE) 
Description Useful for workup of volume depletion, acute renal failure, and acute oliguria. 
Specimen 10 mL (minimum volume: 1.0 mL) aliquot from a 24-hour urine collection in a clean, non-sterile, plastic urine container. No preservative. Refrigerate during collection and send specimen refrigerated.

NOTE:
1. 24-HOUR VOLUME IS REQUIRED ON REQUEST FORM FOR PROCESSING.
2. Prior to aliquoting specimen, mix specimen well, measure and record volume.
3. Follow "Urine Collection" instructions. 

Reference Values 40 - 220 mEq/24 hours 
Analytic Time 1 Day 
Day(s) Test Set Up Monday through Sunday 
CPT Code(s) 84300  

Special Instructions