Ultrasonography reappraisal of tubal patency in assisted reproduction technology patients: comparison between 2D and 3D-sonohysterosalpingography. A pilot study

BACKGROUND The aim of this study was to compare 2D and 3D-sonohysterosalpingography (2D-3D-HyFoSy) with previous diagnostic laparoscopy in the diagnosis of tubal patency, and compare each procedure in terms of procedure's time, perceived pain and complication rate. METHODS We prospectively recruited infertile women, previously submitted to laparoscopy and randomly allocated into 2D-HyFoSy (group I) and 3D-HyFoSy (group II). We analyzed the results in term of sensitivity, specificity, positive predictive value and negative predictive value in tubal patency evaluation of both procedures in comparison with laparoscopy. RESULTS We enrolled 50 women, 25 in group I and 25 in group II. 2D-HyFoSy findings obtained in group I, were concordant with laparoscopy in 81% of cases, with a sensitivity of 80% and a specificity of 92%. In group II, a correspondence was present in 88% of examinations, with a sensitivity and specificity of 98% and 91.4% respectively. 3D-HyFoSy was found to be faster and less painful than 2D (P