- EDTA contamination of the tube
- Vitamin D deficiency
- Hypoparathyroidism
- Primary
- Hypomagnesaemia
- Pseudo-
- Hyperphosphataemia
Signs and symptoms
- Convulsions
- Reflexes hyperactive
- Arrythmias - isolated QTc elongation
- Muscle spasms
- Positive signs - Chvostek/Trousseau
- Sensation changes
Management
- Mild-moderate: oral calcium supplementation
- Severe: intravenous calcium gluconate, 10ml of 10% solution over 10 minutes. Find cause of hypo