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BioMed Research International
Volume 2016, Article ID 4953091, 6 pages
Research Article

Comparison of Perineal Sonographically Measured and Functional Urodynamic Urethral Length in Female Urinary Incontinence

1Department of Gynecology and Obstetrics, University Hospital RWTH Aachen, Aachen, Germany
2Institute of Medical Statistics, University Hospital RWTH Aachen, Aachen, Germany

Received 4 June 2016; Revised 29 August 2016; Accepted 8 September 2016

Academic Editor: Dimitri Barski

Copyright © 2016 Laila Najjari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objectives. To detect the anatomical insufficiency of the urethra and to propose perineal ultrasound as a useful, noninvasive tool for the evaluation of incontinence, we compared the anatomical length of the urethra with the urodynamic functional urethral length. We also compared the urethral length between continent and incontinent females. Methods. 149 female patients were enrolled and divided into four groups (stress, urge, or mixed incontinence; control). Sonographically measured urethral length (SUL) and urodynamic functional urethral length (FUL) were analyzed statistically. Standardized and internationally validated incontinence questionnaire ICIQ-SF results were compared between each patient group. Results. Perineal SUL was significantly longer in incontinent compared to continent patients (). Pairwise comparison of each incontinent type (stress, urge, or mixed incontinence) with the control group showed also a significant difference (). FUL was significantly shorter in incontinent patients than in the control group (). But pairwise comparison showed only a significant difference for the stress incontinence group compared with the control group () and not for the urge or mixed incontinent group. No clear correlation between SUL, FUL, and ICIQ-SF score was found. Conclusions. SUL measured by noninvasive perineal ultrasound is a suitable parameter in the assessment of female incontinence, since incontinent women show a significantly elongated urethra as a sign of tissue insufficiency, independent of the type of incontinence.