Chou Ching-Yu, Chen Li-Ching, Cheong Mei-Leng, Tsai Ming-Song
Department of Obstetrics and Gynecology, Cathay General Hospital Shinchu Branch, Shinchu, Taiwan.
Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, Cathay General Hospital, Taipei, Taiwan; Department of Obstetrics and Gynecology, Cathay General Hospital, Taipei, Taiwan.
Taiwan J Obstet Gynecol. 2015 Oct;54(5):554-8. doi: 10.1016/j.tjog.2015.08.007.
To examine the association of antenatal renal pelvic dilatation observed on midtrimester ultrasound screening with the presence of hydronephrosis in newborn infants.
The records of patients who received fetal ultrasound examination at 18-28 weeks' gestation from May 2008 to March 2012 were retrospectively reviewed. A fetal renal pelvic anterior-posterior (AP) diameter > 4 mm was considered abnormal and ≤ 4 mm was considered normal. On postnatal ultrasound, a renal pelvic AP diameter > 3 mm was considered to indicate hydronephrosis and ≤ 3 mm was considered normal. The association of postnatal hydronephrosis with prenatal pelvic AP diameter was determined using binary logistic regression analysis.
The study comprised 1310 newborn infants: 684 (52.2%) male and 626 (47.8%) female. Multivariate analysis showed a right or left prenatal AP renal pelvic diameter > 4 mm was associated with a higher risk of postnatal hydronephrosis compared with a right and left prenatal AP renal pelvic diameter ≤ 4 mm. Boys had a higher risk for postnatal hydronephrosis than girls (odds ratio = 2.42, p < 0.05).
An antenatal renal pelvic AP diameter > 4 mm on midtrimester ultrasound is predictive of postnatal hydronephrosis.
探讨孕中期超声筛查时观察到的产前肾盂扩张与新生儿肾积水的相关性。
回顾性分析2008年5月至2012年3月期间妊娠18 - 28周接受胎儿超声检查的患者记录。胎儿肾盂前后径（AP）> 4 mm被视为异常，≤ 4 mm被视为正常。产后超声检查时，肾盂AP直径> 3 mm被视为提示肾积水，≤ 3 mm被视为正常。采用二元逻辑回归分析确定产后肾积水与产前肾盂AP直径的相关性。
该研究纳入1310例新生儿，其中男684例（52.2%），女626例（47.8%）。多因素分析显示，与产前左右肾盂AP直径均≤ 4 mm相比，产前左右肾盂AP直径> 4 mm与产后肾积水风险较高相关。男孩产后肾积水风险高于女孩（比值比= 2.42，p < 0.05）。
孕中期超声检查时产前肾盂AP直径> 4 mm可预测产后肾积水。
