Aetiology?
7 main points
Osmosis
Clinical features?
Neuromuscular irritability Paraesthesis Circumoral numbness Cramps Anxiety Tetany Convulsions Stridor Dystonia Papillodema Prolonged QT intervals in ECG
Ix?
PTH PTH Ab Scr (CKD) vit D Mg2+ (severe hypomagnesemia causes) Xray- 4th short metacarpal in pseudohypoparathyroidism (hv pth but end organ resistance)
Tx?
Alpha hydroxylated vitD
Calcium gluconate