Urodynamics for postprostatectomy incontinence: when are they helpful and how do we use them?

Urodynamics is indicated for the evaluation of postprostatectomy incontinence unless an artificial urinary sphincter placement is the preferred option, as in cases of severe incontinence, prior radiation, or previous male sling or artificial urinary sphincter placement--when male sling is unlikely to achieve efficacy. Urodynamics should be performed only when there is a question it can answer that would affect treatment choice or outcome. Urodynamic findings of detrusor underactivity, overactivity, and reduced compliance are important considerations in deciding how best to treat postprostatectomy incontinence.