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Urethral funneling visualized during pelvic floor sonography - analysis of occurrence among urogynecological patients.

OBJECTIVES
There are different diagnostic methods used in women with urinary incontinence symptoms such as: medical history, voiding diary, cough test, pad test, urodynamic testing. None of them is optimal. The aim of this study is to analyze the correlation between urethral funneling visualized during pelvic floor sonography and symptoms of stress urinary incontinence.


MATERIAL AND METHODS
We have performed a retrospective analysis of 657 complete datasets of patients who attended our urogynecological clinic for diagnostics. Women with wet overactive bladder were excluded from the analysis. Tests used in our clinic included: standardized interview and questionnaire, clinical exam, cough test. Pelvic floor sonography with a transvaginal probe in women with filled bladder was performed to assess the urethral length and the urethral funneling during maximal Valsalva maneuver.


RESULTS
In all patients with clinical SUI symptoms and with a positive cough test the urethral funneling length during Valsalva maneuver was > 50% of urethral length (long urethral funneling). In 83.7% of women without SUI the urethral funneling was absent. In the remaining 16.3% funneling was visible but its relative length was less than 50% of urethral length and urine flow was not observed (short urethral funneling).


CONCLUSIONS
Long urethral funneling (> 50% of urethral length) seems to be a characteristic sign for SUI in women. The presence of urethral funneling shorter than 50% of urethral length (short urethral funneling) is not a SUI symptom - it is probably a sign of asymptomatic funneling of bladder neck.