Motility and Functional Gastrointestinal Disorders Center Antroduodenal Manometry

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What is an antroduodenal manometry?

During an antroduodenal manometry a doctor places a small and flexible tube through the nose or an existing g-tube into the stomach and small intestine. This measures how your child’s stomach and intestines move. It's done to help find the cause of your child’s symptoms, such as vomiting, abdominal distention, feeding difficulties, retching, gastroparesis or other stomach and bowel problems.

What happens before an antroduodenal manometry?

  • In most cases, your child will be admitted to the hospital one day before the antroduodenal manometry test.
  • He or she will have an upper endoscopy to ready the body for the antroduodenal catheter the day before the antroduodenal manometry test.

What happens during an antroduodenal manometry?

  • Your child will be brought to the Radiology Department at Boston Children's early (usually around 6 a.m.) the day of the test to get an x-ray and check the placement of the catheter. A computer cart will be brought into your child’s room and set up on the side of your child’s bed.
  • Your child will be asked to go to the bathroom before the catheter is connected to the computer. Once the catheter is connected, your child will be unable to get out of bed and will have to use a bedpan or urinal.
  • A gastroenterology technologist or doctor will connect the tube to the computer cart. The ports of the catheter will be flushed with sterile water. Your child may feel a sensation in his or her abdomen, but this will not cause pain. This tube is then attached to a computer. The computer measures how well the stomach and intestines work during the test.
  • Your child will be asked to eat a special meal during the test. The nurse or technologist will call the kitchen to have the meal delivered at the specified time. Your child will be asked to eat as much as possible over 30 minutes.
  • If your child is unable to eat by mouth, a feeding tube will be used. If your child uses a certain formula please bring it with you.
  • Your child may be given a medication to stimulate the stomach and intestines. Your child may experience cramping as this medication is given.
  • The entire test will take approximately 6 to 8 hours to be completed.

What happens after an antroduodenal manometry?

A gastroenterology nurse practitioner or doctor at Boston Children's will create a follow-up plan for your child. The nurse will review the plan and all instructions with you before you leave.

How will we be informed of the results?

  • When the tube is removed, a Boston Children's gastroenterology doctor will interpret the information recorded in the computer.
  • Call your child's gastroenterologist two weeks after the study for the results. The primary doctor will give follow-up care instructions to you.
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