目的了解六安市金安区婴儿42天常规体检髋关节发育情况和超声筛查发育性髋关节发育不良(developmental dys-plasia of the hip,DDH)的检出率及影响DDH的相关因素,以便于开展早期干预,降低人群DDH的发病率。方法自行设计问卷对来儿童保...目的了解六安市金安区婴儿42天常规体检髋关节发育情况和超声筛查发育性髋关节发育不良(developmental dys-plasia of the hip,DDH)的检出率及影响DDH的相关因素,以便于开展早期干预,降低人群DDH的发病率。方法自行设计问卷对来儿童保健门诊进行42天体检的婴儿常规进行Graf超声检查髋关节,填写问卷并记录检查结果并进行分析。结果本次受检婴儿共1 964名。受检共3 928个髋关节,正常髋关节3 772个(96.03%),可疑髋关节150个(3.81%),异常髋关节6个(0.15%)。其中女婴DDH检出率显著高于男婴;左侧髋关节发生DDH的风险高于右侧;臀位及其他胎位的婴儿DDH的检出率高于头位;羊水量少的婴儿DDH的风险高于羊水正常、羊水多组;婴儿双下肢包裹组DDH的发生风险高于未包裹组。结论基层开展DDH筛查,对该疾病的早期发现,合理预防具有重要的意义。展开更多
Using the boundary element method, the numerical modeling problem of three-dimensional terrain effect on magnetotelluric (MT) field is solved. This modeling technique can be run on PC in the case of adopting special n...Using the boundary element method, the numerical modeling problem of three-dimensional terrain effect on magnetotelluric (MT) field is solved. This modeling technique can be run on PC in the case of adopting special net division. The result of modeling test for 2-D terrain by this modeling technique is basically coincident with that by 2-D modeling technique, but there is a great difference between the results of 3-D and 2-D modeling for 3-D terrain.展开更多
文摘目的了解六安市金安区婴儿42天常规体检髋关节发育情况和超声筛查发育性髋关节发育不良(developmental dys-plasia of the hip,DDH)的检出率及影响DDH的相关因素,以便于开展早期干预,降低人群DDH的发病率。方法自行设计问卷对来儿童保健门诊进行42天体检的婴儿常规进行Graf超声检查髋关节,填写问卷并记录检查结果并进行分析。结果本次受检婴儿共1 964名。受检共3 928个髋关节,正常髋关节3 772个(96.03%),可疑髋关节150个(3.81%),异常髋关节6个(0.15%)。其中女婴DDH检出率显著高于男婴;左侧髋关节发生DDH的风险高于右侧;臀位及其他胎位的婴儿DDH的检出率高于头位;羊水量少的婴儿DDH的风险高于羊水正常、羊水多组;婴儿双下肢包裹组DDH的发生风险高于未包裹组。结论基层开展DDH筛查,对该疾病的早期发现,合理预防具有重要的意义。
基金Project supported by the National Natural Science Foundation of China
文摘Using the boundary element method, the numerical modeling problem of three-dimensional terrain effect on magnetotelluric (MT) field is solved. This modeling technique can be run on PC in the case of adopting special net division. The result of modeling test for 2-D terrain by this modeling technique is basically coincident with that by 2-D modeling technique, but there is a great difference between the results of 3-D and 2-D modeling for 3-D terrain.