Hypomagnesaemia.

In the management of electrolyte abnormalities along with hypokalaemia and hypocalcaemia, etc, presence of hypomsgenesaemia should be thought of even when serum magnesium is within normal limit as magneium is a predominantly intracellulr ion. Two cases of hypomagnesaemia as one of the factors of electrolyte distrubances are communicated in this write-up.