Rectal Manometry | EndoUnit

What is rectal manometry?

Rectal manometry is a test that studies the function of the rectum and anal sphincters. The lower digestive system consists of the large intestine (ascending colon, transverse colon, descending colon, and sigmoid colon), the rectum, and the anus. The rectum serves as a temporary storage area for stool—the waste product of the digestive system. It connects to the anus and is the final part of the digestive tract. Rectal manometry assesses how sensitive the rectum is and how well it functions, as well as the strength of the anal sphincter muscles, which control the opening and closing of the anus.

When is rectal manometry indicated?

Rectal manometry is usually recommended for individuals with:

Fecal incontinence (inability to control bowel movements, leading to stool leakage)
Constipation (fewer than three bowel movements per week)
Hirschsprung’s disease in children (a condition that can cause obstruction in the large intestine)
Prior to or after surgeries in the area (hemorrhoids, fissures, fistulas, rectal prolapse, bowel reconnection)

How is the test performed?

Ένας μικρός σωλήνας (ονομάζεται καθετήρας) εισάγεται μέσα στον πρωκτό, και ακολούθως στο ορθό . (Δείτε την εικόνα του κάτω A small tube (called a catheter) is inserted into the anus and then into the rectum. A small balloon at the end of the catheter is gradually inflated. This stimulates the nerves and muscles of the rectum and anus to begin contracting. The exposed end of the tube remains outside the anus and is connected to a machine that records the contractions and relaxations of the rectum and anal sphincters.

Before the test

Do not eat or drink anything after midnight prior to the test.
Your bowel must be empty before the test. You will need to perform an enema 2-3 hours before your appointment (you can purchase enemas at your local pharmacy).
In most cases, this test will not interfere with any medications you may be taking. Ask your doctor if it’s okay to take your prescribed medications on the morning of the test.

During the test

You will not be sedated during the test.
You will be asked to lie on your side.
A small (about 3 mm in diameter), flexible tube will be slowly inserted through your anus into the rectum.
You may feel some mild discomfort as the tube is inserted, but you should not feel any pain.
Once the tube is in place, the exposed end is connected to a machine that records pressure changes (muscle contractions and relaxations) in the rectum and anal sphincters.
After the measurements are taken, the tube is slowly withdrawn. The gastroenterologist will interpret the recordings made during the test.
The test will take between 10 and 20 minutes to complete.

After the test

Your doctor will discuss the results of the manometry with you. You can go home and return to your normal diet and activities. If you experience any unusual symptoms or side effects, call your doctor.