Kliper Yael, Ben-Ami Moshe, Perlitz Yuri
Baruch Padeh Medical Center, Poria, Affiliated to the Faculty of Medicine, Bar-Ilan University, Ramat-Gan, Israel.
Fetal Diagn Ther. 2014;36(1):69-73. doi: 10.1159/000357705. Epub 2014 May 28.
The aim of this study was to assess the effect of mild pressure applied on the abdominal wall by the ultrasound transducer on fetal cephalic indices.
We examined by ultrasound 60 fetuses of healthy women, at 20-24 weeks of pregnancy, during routine prenatal evaluation. For every fetus biparietal diameter and head circumference were measured, with and without applying mild pressure by the ultrasound transducer. The weight and gestational age (GA) were calculated.
The pressure applied by the transducer had a significant effect on the cephalic indices and on the weight and GA evaluations (p < 0.001). Fetal positioning significantly affected the impact that applied pressure had on head circumference and on the weight evaluation derived from it (p < 0.05).
Applied pressure by an abdominal ultrasound probe affects cephalic indices and the derived weight and GA estimations. This may lead to incorrect diagnoses or hide pathological findings. The effect of applied pressure depends on fetal positioning. The examiner must be aware of this effect when evaluating the results of the measurements.
本研究的目的是评估超声换能器对腹壁施加的轻微压力对胎儿头围指数的影响。
在常规产前检查期间，我们对60例妊娠20 - 24周健康孕妇的胎儿进行了超声检查。对每个胎儿测量双顶径和头围，测量时分别施加和不施加超声换能器的轻微压力。计算胎儿体重和孕周（GA）。
换能器施加的压力对头围指数以及体重和孕周评估有显著影响（p < 0.001）。胎儿体位对头围以及由此得出的体重评估中施加压力的影响有显著影响（p < 0.05）。
腹部超声探头施加的压力会影响头围指数以及由此得出的体重和孕周估计。这可能导致错误诊断或掩盖病理结果。施加压力的影响取决于胎儿体位。检查者在评估测量结果时必须意识到这种影响。
