Anorectal manometry and rectal sensation studies evaluate lower bowel function in patients with constipation or stool leakage. Based on the findings during anorectal manometry, the doctor may recommend biofeedback therapy to help improve defecation or incontinence (stool leakage) by strengthening the muscles used in passing stool

It measures:

• Strength of the anal sphincter muscles
• Sensation of stool in the rectum
• Reflexes that govern bowel movement evacuation
• Movements of the rectal and anal muscles

During the test, a small, flexible sensor is placed in your rectum. This is connected to a computer and a recording device that measures the pressure and strength of your anal and rectal muscles.

During the test, the small balloon attached to the catheter may be inflated in the rectum to assess the normal reflexes and to assess how you perceive stool sensation in your rectum.