EP35.07: Analysis of tubal occlusion region proportion in four‐dimensional hysterosalpingo‐contrast‐sonography

Analyse the proportion of proximal, middle and distal tubal occlusion region in transvaginal four-dimensional hysterosalpingo-contrast-sonography (TV 4D-HyCoSy), and explore the common causes of tubal obstruction. Retrospective analysis of 2514 female infertile patients performed TV 4D-HyCoSy in our hospital in 2018 January to 2018 December. The examination results showed that 823 patients were unilateral or bilateral tubal obstruction (32.7%, 823/2514). The composition ratio of proximal, middle and distal obstruction is calculated. The coincidence rate of fallopian tube obstruction was compared with laparoscopic chromopertubation (LAP) in sixty-two patients. In the 823 patients, 44 fallopian tubes were removed due to ectopic pregnancy or ligated. Of the remaining 1602 tubes, obstruction account for 36.96% (597/1602). Of which 223 tubes were proximal obstruction (37.35%, 223/1602), 57 fallopian tubes were middle obstruction (9.55%, 57/1602) and 317 fallopian tubes were distal obstruction (53.10%, 317/1602). Statistics showed that the coincidence rate of 4D-HyCoSy with LAP for diagnosis of tubal obstruction was 94.3% (117/124), the sensitivity was 90.1% (51/56), and the specificity was 94.1% (64/68). Distal tubal obstruction is most common, which is mostly caused by the adhesion of tubal fimbria due to pelvic inflammation. Followed is proximal tubal obstruction, which is mostly caused by the adhesion of the fallopian tube opening and the blockage of mucous plug. The middle tubal obstruction is mostly caused by scar formation after conservative treatment or incision and embryo extraction of ectopic pregnancy. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.