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Urine Na+.

Common Use:
To assist in evaluating for acute renal failure, acute oliguria, and to assist in the differential diagnosis of hyponatremia.

Urine from an unpreserved random or timed specimen collected in a clean plastic collection container.

Normal Findings:
(Method: Ion-selective electrode)

AgeConventional UnitsSI Units (Conventional Units × 1)
6–10 yr
 Male41–115 mEq/24 hr or mmol/24 hr41–115 mmol/24 hr
 Female20–69 mEq/24 hr or mmol/24 hr20–69 mmol/24 hr
10–14 yr
 Male63–177 mEq/24 hr or mmol/24 hr63–177 mmol/24 hr
 Female48–168 mEq/24 hr or mmol/24 hr48–168 mmol/24 hr
Adult–older adult27–287 mEq/24 hr or mmol/24 hr27–287 mmol/24 hr
Values vary markedly depending on dietary intake and hydration state.

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