Sodium, Urine, 24 Hour
Test Code
UNA24
Description
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 and water deficient dehydration.
Collect
24 hour urine
Pediatric Collection
Minimum volume: 1 mL of urine from a well mixed 24 hour urine collection in a labeled polypropylene or similar plastic tube.
Storage Transport Temp
Offsite: Frozen. Send urine aliquot Priority Overnight via FedEx and in a well insulated container on dry ice.
Stability
Analyze Immediately at RT (15-25°C)
48 hours refrigerated at 2-8°C
Notes
24 hour urine sample is the only acceptable sample type.
Performed
Monday - Friday
Methodology
Ion Selective Electrode
Turnaround Time
4 hours
Department
Core Lab
Synonyms
UNA24
Study Offerings
Not offered
Reference Interval
Female: 10-220 mmol/24 hours
Male: 10-220 mmol/24 hours
CPT Code
84300
New York Approved
FDA Approved or Cleared
FDA
Approved or Cleared