The use of 3D ultrasound in comparing surgical techniques for posterior wall prolapse repair: a pilot randomised...

The most appropriate method for repairing posterior vaginal wall prolapse is still debatable. Women with symptomatic prolapse scheduled to undergo surgical repair in the posterior compartment were randomised to standard posterior colporrhaphy (SPC) or fascial and vaginal epithelial plication (FEP). Participants were assessed with the Prolapse Quality of Life (P-QOL) questionnaire, pelvic organ prolapse quantification (POP-Q) examination and three-dimensional ultrasound (3D US) prior to surgery and 6 months postoperatively. The research hypothesis is that 3D US of the pelvic floor is a reliable tool in comparing the anatomical outcomes of the two different surgical techniques. Differences in anatomical outcomes, assessed clinically and by ultrasonographic evaluation, were compared between the two groups using the Independent Mann-Whitney U-test and the Wilcoxon signed-rank sum test. Twenty-two women were included in the analysis. Six months postoperatively, women in the FEP arm had better anatomical outcomes compared to those who had undergone SPC (p = .02). Repeatability of the ultrasound technique was confirmed, showing moderate to very good agreement in all parameters and the 3D US evaluation was corroborated with the clinical examination, showing a greater reduction in the urogenital size in the FEP group.Impact statementWhat is already known on this subject? The low cost and universal availability of the ultrasound (US) makes it the most commonly used diagnostic modality. The ability to see beyond surface anatomy is important and useful in the assessment of the posterior vaginal wall prolapse and the obstructed defaecation, where this method may replace the defaecation proctography (Dietz 2019). Recent advances in pelvic floor ultrasonography (3D US) have achieved repeatability in the measurement of the levator hiatal (LH) dimensions, introducing a valid and readily available tool for researchers and clinicians (Dietz et al. 2005). Ultrasound may distinguish a true rectocele due to the weakening of the rectovaginal fascia from an enterocele, a rectal intussusception, or just a deficient perineum (Guzman Rojas et al. 2016).What do the results of this study add? Our study demonstrates that 3D translabial pelvic floor ultrasound is a useful and reliable tool in assessing the anatomical outcome of prolapse surgery.What are the implications of these findings for clinical practice and/or further research? Our study demonstrates that 3D translabial ultrasound of the pelvic floor is a useful and reproducible method in evaluating the anatomical outcomes of surgical repair for posterior wall prolapse. Genital hiatus (GH) and levator hiatus (LH) dimensions measured by ultrasound can be used as surrogate anatomical markers in comparing the efficacy of different surgical techniques.