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【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。
【Objective】 To understand the relationship between growth rate and ultrasound bone density during infant growth and development, and to provide basis for exploring bone mineral deficiency and preventing early rickets in infancy. 【Method】 531 6-month-old infants randomly selected for outpatient physical examination from January 2009 to February 2010 were selected. The SOS value of infant tibia was measured by the American Ornau BMD-1000C ultrasonic bone analyzer, and Z value was used for comparison [Z value = (measured value - average value) / standard deviation of age mean] Bone mineralization in the population. 【Results】 There was significant difference in BMD Z value between 6-month-old infants with lower body height and middle-upper 6-year-old infants and those with other height grades (all P <0.05). The positive rate of bone mineral density (Z-score) in 6-month-old infants was in the order of middle and upper middle> middle> lower> upper> lower. 【Conclusion】 We should focus on the screening of the BMD of lower, middle-grade and middle-upper babies to effectively maintain the infant’s bone mineral content, prevent the calcium deficiency during growth and prevent the occurrence of early rickets.