Home
HelpTest Code SOD24 SODIUM 24 HR URINE
Methodology
Direct Potentiometry
Sodium is freely filtered by the glomerulus, and the major route of sodium excretion is through the kidneys. Measurement of urinary sodium is used to determine volume depletion, acute renal failure, salt-losing nephritis, and in the differential diagnosis of hyponatremia.
Specimen Requirements
Container/Tube: Plastic urine container
Specimen Volume: 10 mL from a well-mixed, 24-hour urine collection
Collection Instructions: No preservative. Refrigerate specimen during collection.
Note:
1. Starting and ending times of collection and total volume are required.
2. Follow instructions in “Urine Collection, 24-Hour” in Special Instructions.
Day(s) Test Set Up
Monday through Friday
Reference Values
40-220 mmol/24 hours
Performing Laboratory
Logan Health Medical Center-Chemistry
Test Classification and CPT Coding
84300
Specimen Transport Temperature
Refrigerate