胎儿脐带绕颈的B超诊断与胎先露入盆的关系

Relationship Between Diagnostic Coincidence Ratio of Ultrasonography for The Umbilical Cord Around Fetal Neck and Presentation Engagement

本文对146例妊娠晚期孕妇的胎儿脐带绕颈(UCAN)的B超诊断符合率与胎先露入盆之间的关系进行了探讨。B超诊断UCAN的符合牢为30.6%。B超检查时胎先露入盆组66例;未入盆组78例,两组的符合率分别为92.4%(61/66)和70.5%(55/78),前者明显高于后者,二者有极显著性差异(P<0.005)。B超诊断UCAN 1周的符合率,入盆组功亦明显高于未入盆组,分别为91.8%(56/61)和48.3%(28/58),差异亦有极显著性意义(P<0.005)。提示UCAN的B超诊断符合率与胎先露入盆关系密切。未入盆组符合率低的主要原因是由于UCAN在先露部入盆前既有自行解脱的可能,又有再缠绕的可能。应在短期内B超复查,直至分娩。

One hundred and forty - four third trimester pregnant women were monitored by using Bmode ultrasound before delivery. Umbilical cord around fetal neck (UCAN) had been found in 116. The accurate diagnostic rate was 80. 6%. The accuracy rate of presenting part engagement group diagnosed by ultrasonography was 92. 4%. The accurate diagnosis rate of engagement group was significantly higher than that of the not engagement group (P<0. 005). This study showed that diagnostic coincidence ratio of ultrasound for the UCAN in relation to presentation engagement.