[MIM 602 014]

(hypomagnesemic tetany)

Mg plasma concentration < 0.7 mmol/L.  Very rare situation that can be severe and lethal in the absence of treatment. It is due to a lack of absorption of dietary Mg. In the neonatal period: tetany, tremor, seizures

Anesthetic implications: 

monitoring of electrolytes and volemia; IV MgSO4 administration potentiates the action of the  non-depolarizing myorelaxants and has a vasodilating effect.

References : 

-         Knoers N. 
Hypomagnésémies héréditaires. 
In Actualités Néphrologiques 2000, Flammarion Médecine-Sciences, p 301-11.

Updated: March 2019