Signs
Fall in level promotes tetanus
Chvostek sign
- tapping masseter muscle induces spasm
Trousseau Sign
- flexion of thumb & wrist with extension of fingers
Carpopedal Spasm
ECG
Prolonged QT interval on ECG
Causes
1. Vit D Deficiency
- lack sunlight
- dietry lack
- malabsorption
- liver / renal disease
- anticonvulsants
2. Hypoparathryoidism
- throidectomy
- infiltrative (carcinoma, haemachromatosis)
- idiopathic
3. Hypothroidism
4. Hypophosphataemia (Vit D resistant Rickets)
5. Hypomagnesemia