Mahony B S, Nyberg D A, Luthy D A, Hirsch J H, Hickok D E, Petty C N
Department of Ultrasound, Swedish Hospital Medical Center, Seattle, Washington.
J Ultrasound Med. 1990 Dec;9(12):717-23. doi: 10.7863/jum.1990.9.12.717.
This prospective blinded study compared translabial ultrasound (TLU) and digital palpation of the cervix among women whose cervix could not be visualized adequately or at all with transabdominal ultrasound during the third trimester of pregnancy. The cervical canal and internal cervical os were adequately visualized during 109 of 113 TLUs (96%). The TLU was well tolerated by the patients; only two patients refused the TLU pending discussion of the technique with their obstetrician. Among 43 examinations of patients without clinical cervical effacement, TLU showed a cervical length of 2.5 to 4.2 cm (mean, 2.9 cm). An excellent correlation (R = 0.90) was noted between cervical length on TLU and percentage of cervical effacement on digital examination. The correlation between amount of cervical dilatation on TLU and on digital examination was not high (R = 0.58). We conclude that the measurements of cervical length on TLU correlate well with the amount of cervical effacement on digital examination and that TLU provides a rapid and well-tolerated alternative technique to visualize the third-trimester uterine cervix.
这项前瞻性盲法研究比较了经阴唇超声（TLU）和对宫颈的指诊，研究对象为妊娠晚期经腹部超声无法充分观察到宫颈或完全看不到宫颈的女性。113次经阴唇超声检查中有109次（96%）能充分观察到宫颈管和宫颈内口。患者对经阴唇超声耐受性良好；只有两名患者在与产科医生讨论该技术之前拒绝接受经阴唇超声检查。在对43例无临床宫颈消退的患者进行的检查中，经阴唇超声显示宫颈长度为2.5至4.2厘米（平均2.9厘米）。经阴唇超声测量的宫颈长度与指诊时宫颈消退百分比之间存在极佳的相关性（R = 0.90）。经阴唇超声测量的宫颈扩张程度与指诊测量结果之间的相关性不高（R = 0.58）。我们得出结论，经阴唇超声测量的宫颈长度与指诊时宫颈消退程度密切相关，并且经阴唇超声为观察妊娠晚期子宫颈提供了一种快速且耐受性良好的替代技术。
