Ultrasound imaging in urogynecology - state of the art 2016

Ultrasound in Female Urinary Incontinence

Urinary incontinence (UI) is a common health condition that may interfere with the quality of life. A comprehensive evaluation of female UI helps with effective and safe treatments. Ultrasound has gained popularity to explore UI recently because it can collect crucial information for treatment planning and counseling. Translabial and introital approaches are commonly and reliably applied to ultrasound. The images can be obtained using two-dimensional and three-dimensional ultrasounds. Ultrasound is the only modality capable of confirming the presence or absence of a mid-urethral sling (MUS) and is able to demonstrate bulking agents as well. Although some of the ultrasound findings may only be incidental or supplementary to the patient's symptoms, ultrasound benefits for investigating the pathophysiology of UI and surgical outcomes of MUS procedures. It is anticipated that standardization in terminology, measurement techniques, and reporting can be established in the near future.

Transobturator tape versus single incision sling: how are they different? Clinical outcomes and ultrasonographic features of two mid-urethral slings

PURPOSE

Stress urinary incontinence (SUI) is usually treated with mid-urethral slings. The best approach is still debated and the relationship between slings and pelvic structures is not completely understood. The aim of this study is to identify any difference between trans-obturator tape (TOT) and single incision sling (minisling).

METHODS

Patients submitted to TOT or minisling were included in the study. Q-tip and stress test, ICIQ-SF questionnaire, PGI-I validated score, and 2D/3D transvaginal ultrasound parameters were collected at 1- and 6-month follow-up. Correlations between ultrasound parameters and clinical outcomes, PGI-I and ICIq-SF, were performed.

RESULTS

61 patients were included in the study. PGI-I score was significantly lower in the minisling group than in TOT group at 1-month (p = 0.016) and 6-month follow-up (p = 0.076). The median distance between the sling and the lumen of urethra was significantly higher and the angle between the branches of the sling was significantly narrower in the minisling group. There were significant differences in distances between the sling and the bladder neck at 1-month and 6-month follow-up. An inverse correlation between angle of the branches and the Q-tip test was observed (p = 0.059 Pearson's Rho - 0.578). PGI-I correlated also with angle of the branches (p = 0.009, Pearson's Rho 0.503).

CONCLUSION

Patients undergoing TOT or minisling are similarly satisfied but show differences at ultrasound exam at 1- and 6-month follow-up. Pelvic floor ultrasound could be used in a short-term follow-up to visualize the sling position and to plan the most appropriate follow-up strategy.

Transvaginal ultrasound assessment of urinary tract in gynecological oncology patients: A multicenter prospective study

INTRODUCTION

The aim of this study was to assess the prevalence of urinary tract involvement diagnosed on transvaginal ultrasound examination in women gynecological cancers. The diagnostic performance of transvaginal ultrasound in detecting ureteral and bladder involvement was also evaluated.

METHODS

This is a multicenter prospective study. Women with gynecological cancers or recurrence undergoing ultrasound examination were included. Transvaginal ultrasound is simple and non-invasive method. Ureters, vesico-uterine septum, bladder involvement were evaluated. Sensitivity, specificity, positive predictive values (PPV), negative predictive value (NPV) of ultrasound were calculated. Surgery or imaging methods (MRI or CT scan) were considered as reference standard.

RESULTS

A total of 569 patients were enrolled and 547 of them had diagnosis of malignancy. 56/547 (10.2%) had a diagnosis of urinary tract infiltration at ultrasound examination. On ultrasound examination, both ureters were clearly visualized in the vast majority of cases (507/547, 92.7%), whereas only one ureter was identified in 21/547 (3.8%) patients and both ureters were not visualized in 19/547 (3.5%). Ultrasound examination demonstrated high specificity (>99.0%) and high NPV (>97.0%) for all ultrasound parameters; sensitivity was good for bladder wall infiltration (83.3%) and for vesico-uterine septum infiltration (80.8%), and low for right (69.23%) and left (65.4%) ureter infiltration.

CONCLUSIONS

The prevalence of pelvic urinary tract infiltration on transvaginal ultrasound examination in women with gynecologic malignancy was 10%. We believe that pelvic urinary tract assessment plays a key role during transvaginal ultrasound examination, in order to plan the management of patients with gynecologic cancers.