Vaalamo P, Kivikoski A
Acta Obstet Gynecol Scand. 1983;62(1):19-21. doi: 10.3109/00016348309155751.
Ninety-one pregnant patients in mid-trimester were examined for suspected cervical incompetence using ultrasound. This diagnosis means that detached membranes at the internal os are bulging into a dilated cervical canal. In 13 cases cervical dilatation was found. These patients were operated on using McDonald's purse-string suture. Only one of these patients had premature rupture of the membranes and was delivered at 35 weeks. In all other operated cases the pregnancy continued beyond 37 weeks. Ultrasound is an objective method of diagnosing incompetence of the cervix in pregnancy.
对91名孕中期孕妇进行超声检查，以排查是否存在可疑的宫颈机能不全。该诊断意味着内口处分离的胎膜突入扩张的宫颈管。13例患者发现宫颈扩张。这些患者接受了麦克唐纳荷包缝合术。这些患者中只有1例胎膜早破，于35周分娩。在所有其他接受手术的病例中，妊娠持续至37周以后。超声是诊断妊娠期宫颈机能不全的一种客观方法。
