What is 24 Hour Sodium Excretion?
A urine sodium test measures the total amount of sodium in a urine sample. The 24-hour collection method requires the patient to collect all urine output for a 24 hour period in a special container. The average amount of sodium in the urine is measured to give doctors a more accurate sodium excretion test result.

Sodium is an important electrolyte that must be kept balanced for optimal health. Low levels of sodium excretion can be caused by overhydration or severe restriction of sodium intake. High sodium excretion could mean a high-sodium diet or abnormal function of the pituitary gland, kidneys or hypothalamus.

Normal Value Range

• Negative Pregnancy Adult: 100 to 260 mmol/24h
• Pregnancy Trimester One: 53 to 215 mmol/24h
• Pregnancy Trimester Two: 34 to 213 mmol/24h
• Pregnancy Trimester Three: 37 to 149 mmol/24h

< Laboratory Values During Pregnancy