Urine sodium levels are typically tested in patients who have abnormal blood sodium levels to help determine whether an imbalance is from taking in too much sodium or losing too much sodium. Urine sodium testing is also used to see if a person with high blood pressure is eating too much salt. It is often used in persons with abnormal kidney tests to help determine the cause of kidney damage, which can help guide treatment. DECREASED urinary sodium levels may indicate dehydration, congestive heart failure, liver disease, or nephrotic syndrome. INCREASED urinary sodium levels may indicate diuretic use or Addisons disease.
Transport 1 mL aliquot of urine from a well-mixed collection. (Min: 0.2 mL) Record total volume and collection time interval on transport tube and test request form.
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