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24-Hour Urinary Sodium

Meaning

This clinical assessment quantifies the total amount of sodium ion excreted by the kidneys over a complete 24-hour collection period. It serves as a highly reliable proxy for the average daily dietary sodium intake, reflecting the body’s attempt to maintain fluid and electrolyte balance. Clinicians use this measurement to evaluate patient adherence to low-sodium diets and to investigate conditions involving fluid volume regulation, such as hypertension or certain endocrine disorders. This simple test offers essential insight into the sodium load handled by the renal system and its implications for cardiovascular and hormonal health.