摘要
目的评估超声成像定位胎儿脊髓圆锥的价值。方法采用二维及三维超声检查438胎正常胎儿腰骶部及脊髓圆锥,中孕组(20+6～26+2周)261胎,晚孕组(29+2～40+3周)177胎,记录脊髓圆锥位置,分析不同孕期胎儿脊髓位置的差异;跟踪检查其中的61胎作为对照观察组,观察胎儿中孕期及晚孕期脊髓圆锥位置。结果中孕组胎儿脊髓圆锥下缘止于L2～3.5,晚孕组胎儿脊髓圆锥下缘止于L1～3,较中孕组平均上移0.66个椎体(P<0.001)。对照观察组61胎,晚孕期胎儿圆锥位置较中孕期平均上移0.89个椎体(P<0.001)。结论胎儿脊髓圆锥随孕周增加而上移;三维超声能准确定位中孕期胎儿脊髓圆锥位置。
Objective To observe the value of urtrasound image in positioning fetal conus medullaris normal conus medullaris （CM）. Methods Totally 438 fetuses underwent routine fetal ultrasonographic examinations, and were divided into second-trimester group （261 fetuses, with gestational age 20^＋6-26^＋2 weeks） and third-trimester group （177 fetuses, with gestational age 29^＋2-40^＋3 weeks）. The position of CM was recorded and analyzed. Sixty-one fetuses were extracted as control group. The range of normal position and mean position of CM were calculated. Results The normal range of CM was at the level of L2-3.5 vertebrae body in the second-trimester group, and at the level of L1-3 vertebrae body in the third-trimester group, moved up forward about 0.66 vertebrae body than the former （P〈0. 001）. In the control group, compared with the second trimester, CM position moved up forward about 0.89 vertebrae body in third-trimester （P〈 0. 001）. Conclusion Fetal spinal cord moves up with gestational age increasing. Three-dimensional ultrasound can accu- rately locate fetal CM position during the second-trimester.
出处
《中国医学影像技术》
CSCD
北大核心
2013年第5期779-782,共4页
Chinese Journal of Medical Imaging Technology
关键词
胎儿
脊髓
超声检查
产前
Fetus
Spinal cord
Ultrasonography, prenatal
