维生素D缺乏性佝偻病是由于维生素D不足所致的一种慢性营养性缺乏病,主要见于3岁以下婴幼儿,患病率各地存在差异。上海市资料报道小儿佝偻病的患病率为17.42%[1],哈尔滨市区0~3岁儿童佝偻病的患病率为48.2%,与国内其他地区的调查结果相比,处于偏高水平[2]。佝偻病除引起全身钙、磷代谢失常和以骨骼改变为主的一系列变化外,严重者可致骨骼畸形,影响小儿正常生长发育,并使机体抵抗力降低,免 Vitamin D deficiency rickets is a chronic nutritional deficiency caused by inadequate vitamin D, mainly seen in infants under 3 years of age, with varying prevalence rates. Shanghai data reported that the prevalence of pediatric rickets was 17.42% [1], Harbin City, 0 to 3-year-old children, the prevalence of rickets was 48.2%, compared with the survey results in other parts of the country, at a high level [2 ]. In addition to the rickets caused by systemic calcium, phosphorus metabolism and skeletal changes dominated a series of changes, severe cases can cause skeletal deformities, affecting the normal growth and development of children, and to reduce the body’s resistance, and free