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Urethral calibration or measurement of the urethral diameter will be useful in women with irritative voiding symptoms (dysuria, urgency, frequency, and post-void fullness) who are being evaluate for urinary incontinence.
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Some of these women may be establish to have voiding dysfunction, the urethral disorder or sensory urge incontinence. These disorders in women are generally related with functional relatively than physical obstruction.
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Yet, it is major to rule out true urethral stenosis as a reason of obstructive voiding or detrusor overactivity. Relative urethral stenosis related with atrophic urethritis or the urethral disorder is not uncommon. Women who are having urethral stenosis and they suffers from urge incontinence, voiding dysfunction and the urethral syndrome may benefit from dilatation.
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Urethral calibration must be at <20F, while a low-flow pattern, high-pressure should be observed on the voiding phase of a videourodynamic study along with radiologic evidence of a strictured urethral segment.
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If it was not possible to instrument the urethra, then a detectable stricture or a history of complexity voiding and low flow (with or without raised post void residual) is adequate to make the diagnosis highly likely.
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If there are any doubt that other urethral or periurethral pathology is present, MRI scan need be performed; likewise, if malignant disease is suspected, then a biopsy is warranted prior before any surgical intervention.
