| 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
|
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