由于钙能降低神经肌肉的兴奋性,因此,一旦血钙减少时,神经的兴奋性就增高了,表现为烦躁、易惊、睡眠不安、夜啼等。如果血钙降到0.7毫克/升以下就可能发生抽风。患佝偻病的小儿血钙都是低的,但并不是每个患儿都发生抽风,大多是在某些诱因影响下引起抽风的发作。如甲状腺功能不足,同时患了腹泻、发生脱水酸中毒纠 Because calcium can reduce the excitability of neuromuscular, so once the serum calcium decreased, the nerve excitability increased, manifested as irritability, easy to panic, restless sleep, night crying and so on. Ventilation may occur if serum calcium drops below 0.7 mg / L. Pediatric calcium rickets are low in children, but not all children have ventilation, most of them are induced by some incentives under the influence of ventilation. Such as hypothyroidism, at the same time suffering from diarrhea, dehydration acidosis occurred correction