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Updated: Jul 19, 2026

Ultrasonography of the Adult Male Urinary Tract for Urinary Functional Testing
Published on: August 14, 2019
Pressure flow urodynamic studies: the gold standard for diagnosing bladder outlet obstruction
Abstract:
Bladder outlet obstruction (BOO) is a common cause of lower urinary tract symptoms (LUTS) in men and women. By definition, BOO is determined urodynamically, assessing the pressure-flow relation during voiding. Since the 1960s much work has been done to standardize the urodynamic definitions of obstruction in men and more recently women. Today, urodynamic testing voiding pressure-flow analysis remains the gold standard for the diagnosis of BOO and the etiology of LUTS. The pressure-flow relation is much better defined in men than in women, but recent work suggests that although the definition of obstruction may differ between men and women, the concept of the pressure-flow relation to diagnose obstruction holds true for both genders.
Related Concept Videos
Urodynamic Studies: Uroflowmetry
Imaging Studies VI: Voiding Cystourethrography and Cystography
Imaging Studies I: Kidney, Ureter, and Bladder Studies
Imaging Studies II: Ultrasonography
Imaging Studies V: Intravenous Urography and Retrograde Pyelography
Anatomy of the Genitourinary System II: Bladder and Urethra

