Conditions that interfere with glomerular filtration result in retention of magnesium and, hence, elevation of serum concentrations. Hypermagnesaemia is found in acute and chronic renal failure, magnesium overload, and magnesium release from the intracellular space. Mild-to-moderate hypermagnesaemia may prolong atrioventricular conduction time, while magnesium toxicity may result in central nervous system depression, cardiac arrest and/or respiratory arrest.
Differential diagnosis of hypomagnesaemia
2.4-6.5 mmol/24 h
|Sample & container required||Acidified urine|
|Sample volume||Acidified urine|
|Turnaround time||2 days|