Anorectal Function in Perianal Crohn's Disease

For the assessment of the internal and external anal sphincter integrity. To evaluate fistulas/perianal abscess and seton placement.

"1. rest - basal anal pressures at rest over 60 s~2. squeeze - anal pressure during voluntary effort; long squeeze - anal pressure during sustained voluntary effort~3. cough - anorectal pressure changes during cough~4. push - anorectal pressure changes during simulated defecation~5. rectoanal inhibitory reflex - reflex anal response to rectal distension~6. rectal sensation - assessment of rectal sensitivity to distension."

A non-latex balloon will be inserted in the rectum after applying lubricating gel. This balloon is then filled with 50ml of warm water. The patient is ask to sit on a commode and to try to expel the device in privacy, while the time is being recorded. The test ends when the patient expelled the balloon or when 3 minutes are reach.