Anorectal manometry testing evaluates how the anal sphincter and rectum function together to eliminate feces from the lower digestive system. If you have issues with constipation or fecal incontinence, your doctor may recommend the test to determine potential underlying causes.
The anal sphincter is made up of two muscular valves that control fecal elimination once it collects in the lower part of the digestive tract. The rectum is where stool is held until defecation, and the anal sphincter controls anal opening and closing. However, certain issues may impede the sphincter and rectum from working together as they should, which affects bowel movements (BMs) and continence.
While constipation (fewer than three BMs per week) and fecal leakage are the most common reasons for anorectal manometry, the test may also be recommended to evaluate an individual with: