患者,女,32岁,第2胎,妊娠27~+W。因阵发性下腹痛5小时,阴道流水两小时入院。肛查:宫口近开全,臀位,胎心132次/分,胎心音弱。消毒内诊:宫口开大9 cm,单臀先化。行臀牵引术,四肢及躯干娩出顺利,牵拉胎头时发现一金属节育环套于胎儿颈部,其活动度较大,无变形,为22号节育环,牵拉胎头因难,致胎儿颈部断裂,胎头已基本入阴道,取出一死女婴,体重1100 g,身长38 cm。胎儿面部肿 Patient, female, 32 years old, 2nd child, 27 ~ + W of pregnancy. Due to paroxysmal lower abdominal pain 5 hours, vaginal fluid two hours admitted. Anal examination: cervix nearly all open, breech, fetal heart rate 132 times / min, fetal heart sound weak. Disinfection clinic: Palace opening large 9 cm, single-hips first. Line hip traction, limbs and torso delivered smoothly, pulling the fetal head found a metal IUD set in the fetal neck, greater mobility, no deformation, for the 22 birth control ring, pulling the fetal head due to difficulties, caused by Fetal neck rupture, fetal head has basically into the vagina, remove the dead baby girl, weighing 1100 g, length 38 cm. Fetal facial swelling