Magnesium Regualtion Flashcards
0
Q
Name 2 causes of hypomagnesaemia. (2)
A
GI: severe diarrhoea, malabsorption, extensive bowel resection, intestinal fistuale.
Renal: diuretics, alcohol abuse, osmotic diuresis (eg glycosuria in DM)
1
Q
Is magnesium mainly intra or extracellular? (1)
How is it excreted? (1)
A
Intracellular
Excreted by the kidneys.
2
Q
Why does hypomagnesaemia cause symptoms of hypokalaemia and hypocalcaemia? (2)
A
Hypomagnesaemia causes increased renal loss of potassium and inhibits secretion of PTH causing hypocalcaemia.
3
Q
Hypermagnesaemia is rare.
What is the cause in the majority of cases? (1)
A
Magnesium containing laxatives or antacids in patients with renal failure.
