Test Directory
3287 Sodium, Urine 24hr
Specimen Type
Specimen Stability
Reference Range
24 urine container without preservative.
14 days refrigerated
40-220 mEq/24hr
Specimen Requirements
10mL of 24hr urine collection without preservatives
Method
Ion-Selective Electrode (ISE)
Schedule
Mon-Fri
Turn-Around Time
24hrs
Instructions/Notes
Keep 24hr urine container refrigerated during 24hr collection period.
Clinical Utility
The excretion of sodium varies with dietary intake. There is a diurnal variation of sodium excretion with excretion being greater during daytime than during the night. Decreased levels are seen in congestive heart failure, excessive sweating, diarrhea, pyloric obstruction, malabsorption and primary aldosteronism. Increased levels may be due to increased salt intake, failure of the adrenal glands, diabetic acidosis, salt losing renal disease, diuretic therapy and water deprivation dehydration.
CPT Codes
84300,81050
