Natriumkoncentration
Natriumkoncentration refers to the amount of sodium ions (Na+) in a given volume of solution, most commonly expressed as millimoles per liter (mmol/L) or milliequivalents per liter (mEq/L). In human physiology, natriumkoncentration is typically described for extracellular fluid and blood plasma, where sodium is the principal extracellular cation and contributes substantially to the osmolality of body fluids.
In adults, the normal serum sodium concentration is about 135–145 mmol/L, though reference ranges may vary by
Regulation of natriumkoncentration is achieved mainly through the kidneys and related hormonal systems. Aldosterone increases sodium
Clinical relevance and measurement commonly focus on serum/plasma natriumkoncentration. Abnormal levels indicate dysnatremia: hyponatremia (<135 mmol/L)
Laboratory assessment may also include urine sodium concentration to evaluate renal handling, and calculations of plasma