Abstract: 【Objective】 To investigate the relationship between the height of development and ultrasound bone density of infants, and discuss the deficiency of bone mineral substance in the development of infants, then provide the basis of taking precautions against premature rickets. 【Methods】 The investigation was conducted in 531 6-month-old infants who were selected by stochastic monitoring method in physical examination of outpatient clinic from January 2009 to February 2010, the way was to measure the SOS value of infants' tibial by ultrasonic bone analyzer of Aonuo BMD-1000C of America, and compare with Z value(Z value=(measuring value-mean value)/ Standard deviation of mean value of different age), so could show the bone mineralization situation of infants who be measured in groups of same age. 【Results】 The z value of 6-month infant' bone density had remarkable difference or obvious difference between the low-grade or above average and other grades of heignt evaluation(P all＜0.05). the gradus of the relationship between the positivity rate of Z value of 6-month infant' bone density and the grades of heignt evaluation was average +> above average> average-> below average> superior>low grade. 【Conclusions】 Screening of bone density in priority of such infants whose heignt evaluation was low grade, average and above average, so could maintain level of bone mineral substance in effect and avoid deficiency of bone calcium during the development, taking precautions against premature rickets.

Key words: infant, bone density, bone mineral substance, height

摘要： 【目的】 了解婴儿生长发育期间身高的增长速度与超声骨密度之间的关系,为探讨婴儿生长发育期间骨矿物质缺乏及预防早期佝偻病的发生提供依据。 【方法】 取2009年1月-2010年2月份门诊体检随机监测的6月龄婴儿531名。采用美国奥诺BMD-1000C型超声骨质分析仪进行婴儿胫骨SOS值测量,并采用Z值进行比较[Z值=(测值-均值)/年龄均值标准差],从而显示被测个体在同人群中的骨矿化状况。 【结果】 身长评价等级为下等及中上的6个月龄婴儿骨密度Z值与身长评价为其它等级的婴儿骨密度Z值差异有统计学意义(P均＜0.05)。6个月龄婴儿骨密度Z值的阳性率与身长评价等级关系顺位为:中+＞中上＞中＞中下＞上＞下。 【结论】 应重点筛查身长评价等级为下等、中等达标及中等偏上婴儿的骨密度,有效维持婴儿的骨矿物质水平,防止生长发育期间骨钙缺乏及预防早期佝偻病的发生。

关键词: 婴儿, 骨密度, 骨矿物质, 身长