Physiological and pathological urethral pressure variations.
From an analysis of 202 patients and a careful literature analysis we conclude that pathological urethral instability should be differentiated from physiological urethral pressure variations by the following criteria: a pronounced amplitude of at least one third of the maximum urethral pressure variations by the following criteria: a pronounced amplitude of at least one third of the maximum urethral closure pressure (usually > 25 cm H2O), a short duration (1-5 s), a simultaneous inhibition of the electromyographic activity in urethral and (or) anal sphincter, and the occurrence of the phenomena starting at the beginning of bladder filling (100 ml).
Department of Urology, St. Pieter University Hospital, Leuven, Belgium.
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Vereecken
D004576:Electromyography; D005260:Female; D006801:Humans; D011312:Pressure; D014521:Urethra / Q000502:physiology* / Q000503:physiopathology; D014549:Urinary Incontinence / Q000503:physiopathology; D014563:Urodynamics / Q000502:physiology