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Center for Motility and Functional Gastrointestinal Disorders

 Center for Motility & Functional Gastrointestinal
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Flower Anorectal Manometry
An anorectal manometry is a test in which the doctor places a small, soft, flexible tube into the rectum. A tiny balloon is attached to the end of the tube. This balloon is filled with small amounts of air to measure how your child's muscles and nerves work inside the rectum.

Why is it necessary?
Anorectal manometry is often done to help find the cause of your child's symptoms, such as constipation, stool accidents or other bowel problems. It may also be done before or after surgery to check how your child's rectal muscles and nerves are working.

How should I prepare my child?
You will receive instructions in the mail regarding the bowel preparation, or a nurse from the Gastroenterology (GI) Program will call you to tell you what you need to do to get your child ready for anorectal manometry. The nurse will discuss any questions or concerns you may have about the test. If your child has a latex allergy, please tell the nurse at this time. A latex-free balloon will then be used for your child.

Be open and honest with your child about the test. Explain in simple terms why the test is needed and what will happen. To help comfort your child, tell him or her that he or she may bring a favorite book, stuffed animal, blanket, music tape, or CD and that you will stay with your child during the test

This test is not painful, but some children may feel anxious about it. It is very important that your child remain still during the test. If you feel your child will have trouble staying still, please let us know. Some children need medicine to help them relax and remain quiet. Please do not bring other children with you to the test. If you must bring other children, please have another adult with you to care for these children.

What happens before the test?
The procedure is usually done in the Endoscopy unit. If your child is already a patient in the hospital, he or she will come directly to the Endoscopy Unit for the test. Otherwise, please arrive in the Endoscopy Unit on the 3rd floor of the Farley building 45 minutes before the scheduled time of the test. It is important that you are on time. If you are late, the procedure may be cancelled.

If you park your car at the Children's Hospital garage, bring your parking ticket with you and have it stamped in the Main Lobby. When you arrive, follow the signs to the Farley/Pavilion elevators. Take the Farley/Pavilion elevators to the 3rd floor. Follow the signs for the Endoscopy Unit.

When you arrive at the Endoscopy Unit, a nurse will greet you and your child to explain the test and answer your questions.

What happens during the test?

  • Your child will be brought into the room where the test is done. The test will take about 30 to 45 minutes.
  • If needed, the doctor will give your child medicine to help him or her sleep. If your child needs medicine to sleep, he or she will have heart and oxygen monitors on.
  • Your child will lie on his or her left side for the procedure. The doctor places a small, soft, flexible tube into the rectum. This tube is attached to a computer. The computer measures how well the rectal muscles work.
  • Next, the doctor or nurse slowly inflates and deflates a tiny balloon on the end of the tube. At the same time, the computer records the activity of the nerves and muscles in the rectum. There is no discomfort associated with this. The doctor may ask your child to say when he or she feels the balloon as it inflates. The doctor may also ask your child to squeeze down on the tube or try to push the tube out of the rectum. Again, this is not uncomfortable.
  • The doctor will remove the tube when the test is finished.
What happens after the test?
If your child did not receive sedation (medicine to cause sleepiness) for the test, he or she may go home when the test is over. The nurse will review all instructions with you before you leave.

If your child did receive sedation, the nurse will move him or her to the Recovery Area. You will be directed to the Family Waiting Area. From there, a nurse will bring you to the Recovery Area to be with your child. We ask that you do not bring siblings or other young children into the Recovery Area. Children may wait with another adult in the Family Waiting Area.

In the Recovery Area, the nurse will stay with your child and carefully observe him or her during the entire recovery time. When your child is fully awake, he or she may have clear liquids to drink. Generally, children are able to go home about one hour after the test is done. The recovery room nurse will review all instructions with you before you leave.

Patients who receive sedation must have a responsible adult with them when they leave the hospital. Since your child may still be sleepy or unsteady, please arrange to have private transportation to go home. Do not plan to take a bus or the MBTA. If a ride has not been arranged, the procedure may be canceled.

How will we be informed of the results?
The doctor who performed the exam will talk to you about the test results before you go home that day. Your primary GI doctor will give you follow-up care instructions.

When do I call my child's doctor or nurse?

  • If your child is sick 24 to 48 hours before the test is scheduled, call the GI/Endoscopy Unit at 617- 355-6172 between 8 a.m. and 4 p.m. Ask to speak to one of the nurses.
  • If you have any questions about the test, call the above number.
  • For emergencies, you can call a GI doctor 24 hours a day. Call the hospital page operator at 617- 355-6369 and ask for the GI fellow on call.
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