Reinold E, Eppel W, Asseryanis E, Frigo P, Schurz B
Ludwig-Boltzmann-Institut für Entwicklung und Verhalten des Feten.
Z Geburtshilfe Perinatol. 1994 Oct-Dec;198(5-6):196-200.
The cervix uteri is of greatest importance for the environment of the fetus. The sonographic imaging of the cervix uteri can be done by transabdominal, perineal and transvaginal route. Each of these methods are associated with specific advantages and disadvantages. During the time of gestation the cervix uteri can be measured sonographically concerning the length, the thickness, the width of the cervical canal and in addition the diameter of the internal and the external os. At the beginning of labour the cervix shows a transformation: a shortening with an increase of thickness. The phase of contraction is followed by a phase of reformation. Individual formations of the cervix regarding the a premature opening of the internal os or the external os could be demonstrable without clinical symptoms. By W. Eppel a score-like formula "Incompetence-Factor" was described for a quantification of these measurements.
子宫颈对胎儿的生长环境至关重要。子宫颈的超声成像可通过经腹、会阴和经阴道途径进行。这些方法各有其特定的优缺点。在妊娠期，可以通过超声测量子宫颈的长度、厚度、宫颈管宽度，以及宫颈内口和外口的直径。分娩开始时，子宫颈会发生变化：长度缩短，厚度增加。收缩期之后是重塑期。子宫颈的个别形态，如宫颈内口或外口过早开放，在没有临床症状的情况下也可被检测到。W. 埃佩尔描述了一种类似评分的公式“功能不全因子”，用于对这些测量结果进行量化。
