Alright, as a quick recap, hypocalcemia describes a low concentration of free ionized calcium in the blood, which most commonly results from defective production of calcium controlling hormones, like parathyroid hormone and active vitamin D.

得！快速回顾一下：低钙血症意味着血液中游离离子钙的浓度低，最常见的原因是钙调控激素如甲状旁腺激素和活性维生素D的生成出现问题。