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Sodium, 24-Hour Urine without Creatinine
Test Code11317
CPT Codes
84300<br><strong>This test is not available for New York patient testing.</strong>
Includes
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
10 mL 24-hour urine, no preservative in a plastic leak-proof container
Minimum Volume
2 mL
Other Acceptable Specimens
10 mL 24-hour urine preserved with boric acid or acetic acid in a plastic leak-proof container • 24-hour urine preserved with HCL in a plastic leak-proof container • 24-hour urine collected in a urinalysis transport tube (yellow-top, blue fill line, preservative tube)
Instructions
Record total volume and collection time on specimen container and requisition
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 14 days
Refrigerated: 14 days
Frozen: 60 days
Refrigerated: 14 days
Frozen: 60 days
Methodology
Ion Selective Electrode (ISE)
Setup Schedule
Set up: Daily; Report available: 2 days
Clinical Significance
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.
