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To assess electrolyte balance related to hydration levels and disorders such as diarrhea and vomiting and to monitor the effect of diuretic use.
Serum collected in a gold-, red-, or red/gray-top tube. Plasma collected in a green-top (heparin) tube is also acceptable.
(Method: Ion-selective electrode)
|Age||Conventional & SI Units|
|Cord||126–166 mEq/L or mmol/L|
|1–12 hr||124–156 mEq/L or mmol/L|
|12–24 hr||132–159 mEq/L or mmol/L|
|24–48 hr||134–160 mEq/L or mmol/L|
|48–72 hr||139–162 mEq/L or mmol/L|
|Newborn||135–145 mEq/L or mmol/L|
|7 d–1 mo||134–144 mEq/L or mmol/L|
|2 mo–5 mo||134–142 mEq/L or mmol/L|
|6 mo–1 yr||133–142 mEq/L or mmol/L|
|Child–Adult–older adult||135–145 mEq/L or mmol/L|
|Note: Older adults are at increased risk for both hypernatremia and hyponatremia. Diminished thirst, illness, and lack of mobility are common causes for hypernatremia in older adults. There are multiple causes of hyponatremia in older adults, but the most common factor may be related to the use of thiazide diuretics.|
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Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Sodium, Blood." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425089/all/Sodium__Blood.
Bladh ML, Van Leeuwen AM. Sodium, Blood. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425089/all/Sodium__Blood. Accessed April 26, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Sodium, Blood. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425089/all/Sodium__Blood
Bladh ML, Van Leeuwen AM. Sodium, Blood [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 April 26]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425089/all/Sodium__Blood.
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