Anorectal Manometry


What is an anorectal manometry?

An anorectal manometry is a test to measure how your child’s muscles and nerves work inside the rectum.  A small, soft, flexible tube with a small balloon on the end is used.

Why is it necessary?

This test is done to help find the cause of your child’s problems (e.g. constipation, stool accidents, etc.)

How should I prepare my child?

  • Your child should have an empty rectum on the day of the procedure.  Your GI physician will discuss a plan to do this.  Often, a fleet enema is given the night before the test.
  • We encourage being open and honest about the procedure.  Explain in simple terms why it is needed, and allow your child to bring a favorite toy, blanket, or other object that will stay with him/her during the test. 
  • A child life specialist may be available to help during the procedure.   

Where is the procedure done?

The manometry is completed in the GI procedure suite (Abercrombie Building, second floor). 

What happens before the test?

Go directly to the GI procedure suite on the second floor of the Abercrombie building by taking the orange elevators. You may valet park your car in front of the West Tower and your ticket will be validated. When you arrive in the GI procedure suite, a nurse will greet you and your child, explain the test, and answer your questions.

What happens during the test?

  • Your child will lie on his/her back or left side throughout the study (often less than 30 minutes).  A small, flexible tube is placed into the anorectum.  Parents are allowed to be present during the procedure. 
  • Your child may receive oral sedation medication.
  • Your child may be asked to perform certain actions such as squeezing and pushing like one is having a bowel movement.

What happens after the test?

The doctor will remove the tube when the test is finished.  If overall sedation was given, your child may need to be observed for some time afterwards.  This test does not require an overnight stay in the hospital.

How will we be informed of the results?

A Texas Children’s GI doctor will interpret the results and will contact you.  Please allow up to 2 weeks for results to be provided.

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

If you have any further questions about the test, please contact your Texas Children’s Hospital gastroenterology provider on weekdays between 8 a.m. and 5 p.m.