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biochemistryHas Critical Values
Sodium
Na⁺· also: Na⁺, Sodium
Clinical Overview
Sodium is the primary extracellular electrolyte controlling fluid balance. Abnormal sodium causes neurological symptoms. Critical for cardiac and brain function.
Reference RangesWHO/IFCC standards
| Reference Range | Unit | Notes |
|---|---|---|
| 136 – 145 | mEq/L | — |
Also reported in: mmol/L.
Critical (Panic) Values
Critical Low: < 120 mEq/L. Critical High: > 160 mEq/L. Values outside these limits require immediate clinical attention.
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Related Topics
electrolyteshyponatremiahypernatremiafluid balance