Esophageal manometry is a test used to identify swallowing problems. It measures the strength and muscle coordination of your esophagus when you swallow. The esophagus is the "food pipe" leading from the mouth to the stomach.
During the manometry test, a tube is passed through the nose, along the back of the throat, down the esophagus, and into the stomach.
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Your esophagus moves food from your throat down to your stomach with a wave-like motion called peristalsis. Manometry will indicate how well the esophagus can perform peristalsis. Manometry also allows the doctor to examine the muscular valve connecting the esophagus with the stomach, called the lower esophageal sphincter, or LES. This valve relaxes to allow food and liquid to enter the stomach. It closes to prevent food and liquid from moving out of the stomach and back up the esophagus.
Abnormalities with peristalsis and LES function may cause symptoms such as swallowing difficulty, heartburn, or chest pain. Information obtained from manometry may help doctors to identify the problem. The information is also very important for anti-reflux surgery.
What Happens Before Manometry?
Before having manometry, be sure to tell your doctor if you are pregnant, have a lung or heart condition, have any other medical problems or diseases, or if you are allergic to any medications.
Also, tell your doctor about any medicines you take. There are some drugs that may interfere with esophageal manometry. These include:
Do not discontinue any medication without first consulting with your doctor.
Can I Eat or Drink Before Manometry?
Do not eat or drink anything eight hours before having manometry.
What Happens During Esophageal Manometry?
During esophageal manometry, a small (about 1/4 inch in diameter) flexible tube is passed through your nose, down your esophagus, and into your stomach. You are not sedated, although a topical anesthetic (pain-relieving medication) may be applied to your nose to make the passage of the tube more comfortable. The tube is connected to a machine that records the contractions of the esophageal muscles on a graph.