Taylor Betty Kay
Maternal Fetal Medicine, Rogue Valley Medical Center, 2911 Siskiyou Blvd., Medford OR 97504, USA.
J Obstet Gynecol Neonatal Nurs. 2011 Sep-Oct;40(5):617-31. doi: 10.1111/j.1552-6909.2011.01284.x.
Sonographic assessment of cervical length is useful in evaluating the risk of preterm birth. Ultrasound is more accurate than digital exam and can be used in conjunction with fetal fibronectin (fFN) testing. Documentation of a long cervical length can reduce unnecessary treatments and hospitalizations in women who are unlikely to give birth preterm. Short cervical length can promote prompt intervention. Recognition of normal sonographic anatomy and proper measurement of the cervical canal are required.
超声测量宫颈长度有助于评估早产风险。超声检查比指诊更准确，且可与胎儿纤连蛋白（fFN）检测联合使用。记录宫颈长度较长可减少对不太可能早产的女性进行不必要的治疗和住院。宫颈长度较短则可促使及时干预。需要识别正常的超声解剖结构并正确测量宫颈管。
