孕期骨盆外测量径线变化观察

目的观察中期妊娠及晚期妊娠骨盆外测量径线的变化。方法随机选取2007年6月至2008年1月间我院门诊产检的孕妇100名，分别在妊娠16—20周时和妊娠37周后进行骨盆外测量，测定髂棘间径、髂嵴间2径、骶耻外径和坐骨结节间径，分别比较两次测量各径线的大小，统计方法采用配对t检验。结果中孕期髂棘间径、髂嵴间径、骶耻外径和坐骨结节间径分别为（24．01±0．52）cm、（26．21±0．62）cm、（19．12±0．82）cm、（8．25±0．61）cm，晚孕期分别为（25．11±0．55）cm、（27．08±0．68）cm、（21．25±0．88）cm、（8．92±0．58）cm，对中孕期和晚孕期各径线进行配对t检验，各径线差别均有显著性；并且发现晚孕期每一孕妇每一径线均比中孕期增大。结论晚孕期孕妇骨盆外测量各径线比中孕时增大。

The observation on the change of the diameters of external pelvic measurement during pregnancy

Objective To observe the change of the diameters of external pelvic measurement between mid-pregnancy and late pregnancy. Methods 60 pregnancy weman who had prenatal examination in our hospital between June,2007 to January,2008 were selected randomly. They were performed external pelvic measurement between 16 and 20 gestational weeks nd after 37 gestational weeks respectively. Interspinal diameter,intercristal diameter,external conjugate and transverse outlet were measured. Each diameter was compared between mid-pregnancy and late pregnancy using paired t-test. Results Interspinal diameter,intercristal diameter,external conjugate and transverse outlet of mid-pregnancy weman were (24.01±0.52) cm, (26.21±0.62) cm, (19.12±0.82) cm, (8.25±0. 61 ) cm,and those of late pregnancy weman were(25.11±0.55)cm, (27.08± 0.68) cm, (21.25±0.88 ) cm and (8.92±0.58 ) cm. There was significant difference between the two measurements. And each diameter of each pregnancy woman in late pregnancy was longer than that in mid-pregnancy. Conclusion The diameters of external pelvic measurement in late pregnancy are longer than those in mid-pregnancy.