Manometry

What is Manometry?

Esophageal manometry (muh-NOM-uh-tree) is a test that shows whether your esophagus is working properly. The esophagus is a long, muscular tube that connects your throat to your stomach. Esophageal manometry measures the rhythmic muscle contractions that occur in your esophagus when you swallow. Esophageal manometry also measures the coordination and force exerted by the muscles of your esophagus. This test will tell your doctor if your esophagus is able to move food to your stomach normally.

Who needs it?

Your doctor may recommend esophageal manometry if you’re experiencing symptoms that could be related to an esophageal disorder. Esophageal manometry provides information about the movement (motility) of food through the esophagus and into the stomach. The test measures how well the circular bands of muscle (sphincters) at the top and bottom of your esophagus open and close, as well as the pressure, strength and pattern of the wave of esophageal muscle contractions that moves food along.

A common misconception is that manometry is intended for patients who have difficulty swallowing. If the main symptom you are experiencing is difficulty swallowing (dysphagia) or pain when swallowing (odynophagia), your doctor is likely to order other imaging tests, such as x-rays, before or instead of esophageal manometry. Imaging studies typically identify or rule out an obstruction in the esophagus. Swallowing problems generally point more strongly to an obstruction than to a motility disorder.

Esophageal manometry may be used to help diagnose:

  • Diffuse esophageal spasm. This rare swallowing problem is characterized by multiple, forceful, poorly coordinated muscle contractions of your esophagus.
  • This uncommon condition occurs when your lower esophageal muscle (sphincter) doesn’t relax properly to let food enter your stomach. Muscles in the wall of your esophagus are often weak as well. This can cause difficulty swallowing and regurgitation of food back up into your throat.
  • In many people with this rare progressive disease, the muscles in the lower esophagus stop moving, leading to severe gastroesophageal reflux.

If you’re considering undergoing anti-reflux surgery to treat gastroesophageal reflux disease (GERD), your doctor may recommend esophageal manometry to make sure you don’t have achalasia or spasm, which GERD surgery can’t help.

If you have swallowing problems and chest pain not related to your heart, esophageal manometry may be recommended after an endoscopy to rule out GERD.

How is the test performed?

  • While you are sitting up, a member of your health care team sprays your throat with a numbing medication or puts numbing gel in your nose or both.
  • A catheter is guided through your nose into your esophagus. The catheter may be sheathed in a water-filled sleeve. It doesn’t interfere with your breathing. However, your eyes may water, and you may gag. You may have a slight nosebleed from irritation.
  • After the catheter is in place, you may be asked to lie on your back on an exam table, or you may be asked to remain seated.
  • You then swallow small sips of water. As you do, a computer connected to the catheter records the pressure, strength and pattern of your esophageal muscle contractions.
  • During the test, you’ll be asked to breathe slowly and smoothly, remain as still as possible, and swallow only when you’re asked to do so.
  • A member of your health care team may move the catheter down into your stomach while the catheter continues its measurements.
  • The catheter then is slowly withdrawn.

The test usually lasts about 30 minutes.