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目的 开发一种非侵入性数字声波技术 ,反映髋关节的结构特征 ,用于新生儿髋发育不良的早期筛查。方法 应用包括有刺激系统、传导系统和带有双通道数字过滤程序数据分析系统的数字声波技术 ,测量分析了 90例正常新生儿两侧髋关节声波信号相关性 (CF)和声强差异 (D) ,并初步对 16例 1～ 60个月婴幼儿进行相应测量 ,并与正常组进行比较。结果 在 160～ 3 15Hz范围 ,两侧髋关节声波信号相关性 :正常组CF >0 .94 ;髋发育不良组中有 6例CF <0 .8。声强差异 :正常组D<2dB ;髋发育不良组均明显大于正常 ,差异有显著性意义 (P <0 .0 0 1)。统计学处理还表明 ,以声强差异 2dB为临界点 ,灵敏度可以达到 10 0 %。结论 该声波技术提供了一个用数字客观评估髋关节声波信号的实用方法 ,可用于新生儿髋发育不良的早期筛查。
Objective To develop a noninvasive digital acoustic technique that reflects the structural features of the hip joint for the early screening of neonatal hypoplasia. Methods The application of stimuli system, conduction system and digital sound wave technology with two-channel digital filtering program data analysis system were used to measure and analyze the relationship between the acoustic signal intensity (CF) and the sound intensity difference (D) on the hip of 90 normal newborns ), And initially 16 cases of 1 to 60 months of infants and young children were measured accordingly, and compared with the normal group. Results 160 ~ 3 15Hz range, bilateral hip joint acoustic signal correlation: normal group CF> 0.94; hip dysplasia group 6 CF <0.8. Sound intensity differences: normal group D <2dB; hip dysplasia were significantly greater than normal, the difference was significant (P <0. Statistical analysis also shows that the sensitivity to 10% can be achieved with a 2dB difference in sound intensity as the critical point. CONCLUSIONS This acoustic technique provides a practical way to objectively evaluate hip joint acoustic signals numerically and can be used for early screening of neonatal hypoplasia.