title: [Infravesical obstruction].
abstract: Infravesical obstruction presents clinically in the form of dysuria. Urodynamic studies play an important role to distinguish between a disorder of detrusor contractility and a functional or organic obstruction. The value of uroflowmetry, static and voiding urethral pressure profiles, cystometry and electromyography is discussed. The instantaneous voiding profile appears to be the most useful test: it allows calculation of urethral resistance, which is the ratio between bladder voiding pressure and the square of flow. Bladder neck obstruction is present in more than 80% of cases with a value greater than 0.5. Obstacles are more easily identified clinically in women, but the same tests can be applied with a poorer reliability for urethral resistance.
authors.affiliation: Service d'Urologie; Centre Hospitalier Universitaire de Liège, Belgique.
authors.forename: P
authors.initials: P
authors.lastname: Depireux
authors.forename: J
authors.initials: J
authors.lastname: de Leval
mesh_terms: D004576:Electromyography; D005260:Female; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D001748:Urinary Bladder Neck Obstruction / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D014555:Urination Disorders / Q000209:etiology*; D014563:Urodynamics
vernacular_title: Obstruction infravésicale.