Improving the Accuracy of Diagnosing Placenta Previa on Transvaginal Ultrasound by Distinguishing between the Uterine Isthmus and Cervix: A Prospective Multicenter Observational Study

Junichi Hasegawa, Ikuno Kawabata, Yoshiharu Takeda, Hiroaki Aoki, Takehiko Fukami, Atsushi Tajima, Kei Miyakoshi, Katsufumi Otsuki, Norio Shinozuka, Yoshio Matsuda, Mitsutoshi Iwashita, Takashi Okai, Akihito Nakai

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Objective: To clarify whether distinguishing between the uterine isthmus and cervix can improve the accuracy of diagnosing placenta previa at term. Methods: A multicenter prospective observational study was conducted among pregnant women with suspected placenta previa at 20-24 weeks' gestation. Subjects were divided into the open isthmus group and closed isthmus group. The accuracy of diagnosing placenta previa at term was compared between the 2 groups. Results: We screened 9,341 patients, and 53 (0.6%) met the inclusion criteria. Nineteen cases with an open isthmus and 34 with a closed isthmus were followed. The accuracy for diagnosing placenta previa or a low-lying placenta at term was 94.7% in the open isthmus group and 26.5% in the closed isthmus group (p < 0.001). Elective or emergency Cesarean section was required in 100% of cases in the open isthmus group and 20.6% in the closed isthmus group (p < 0.001). Conclusion: A high prediction rate of placenta previa was obtained by using transvaginal ultrasound at 20-24 weeks' gestation after the isthmus opened by carefully distinguishing between the cervix and isthmus.

本文言語English
ページ(範囲)145-151
ページ数7
ジャーナルFetal Diagnosis and Therapy
41
2
DOI
出版ステータスPublished - 2017 3 1

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Embryology
  • Radiology Nuclear Medicine and imaging
  • Obstetrics and Gynaecology

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