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<section begin="clinical biochemistry" />'''Sodium''' is an abundant electrolyte in the body, and sodium ion (Na+) is the dominant ion in the extracellular space. 65% of sodium is in the extracellular space. Abnormally low or high sodium ([[hyponatraemia]] and [[hypernatraemia]], respectively), are | <section begin="clinical biochemistry" />'''Sodium''' is an abundant electrolyte in the body, and sodium ion (Na+) is the dominant ion in the extracellular space. 65% of sodium is in the extracellular space. The main clinical function of sodium is to maintain osmolality. | ||
Abnormally low or high sodium ([[hyponatraemia]] and [[hypernatraemia]], respectively), are common but potentially lethal disorders in the worst case.<section end="clinical biochemistry" /> | |||
<section begin="clinical biochemistry" /> | <section begin="clinical biochemistry" /> | ||
== Reference ranges == | |||
{| class="wikitable" | |||
| | !'''Parameter''' | ||
| | !'''Sample''' | ||
| Sodium | !'''Reference range''' | ||
| | |- | ||
| | |Sodium | ||
|Serum | |||
|136 – 146 mM | |||
|- | |||
|Osmolality | |||
|Serum | |||
|275 – 305 mOsmol/kg | |||
|- | |||
|Osmolality | |||
|Urine | |||
|50 – 1400 mOsmol/kg | |||
|} | |||
== Sodium in the body == | == Sodium in the body == |