在美国,早产仍然是围产期死亡率及发病率的重要原因。处理早产病人时,在临床明显早产症状发生之前能否察觉宫颈的细微变化是最重要的问题,增加指诊次数并未证明其为有效的方法,可能是由于检查的主观性。腹部超声估计宫颈情况,会受到患者体型及胎先露位置的影响,使用90°角阴道探头扫描,也很难达到理想的要求。本研究的目的是通过使用240°角视野的阴道探头建立一种准确的子宫颈长度检查方法,并与标准的指检方法进行比较。所有超声检查由同一作者进行,所有指检由另一作者进行,两检查者互相不知道对方的检查结果。阴道超声探头240°扫描野,检查标准:见到并 In the United States, preterm birth is still a significant cause of perinatal mortality and morbidity. When treating patients with preterm birth, it is of paramount importance to detect subtle changes in the cervix before clinically apparent preterm symptoms occur. Increasing the frequency of fingerprinting does not prove to be an effective method, possibly due to the subjectivity of the examination. Abdominal ultrasound to estimate the condition of the cervix can be affected by the size of the patient and the location of the fetus. Scanning with a 90 ° angle vaginal probe is also difficult to achieve. The objective of this study was to establish an accurate cervical length test using a vaginal probe at a 240 ° angle of view and to compare it with a standard finger test. All ultrasound examinations were performed by the same author. All examinations were performed by another author. The two examiners did not know each other’s examinations. Vaginal ultrasound probe 240 ° scan field, check the standard: see and