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A 25-year-old member asked:

How big is the catheter used during esophageal manometry?

3 doctor answers5 doctors weighed in
Dr. Brett Kalmowitz
Gastroenterology 23 years experience
Small compared: With food that you typically eat and swallow and smaller then most endoscopes for traditional endoscopy. The manometry catheter is designed to go into the nose so it has to be small. However, some technicians will let you swallow the tube through the mouth which may make it easier. Worth asking....
Dr. Vivek Huilgol
Gastroenterology 36 years experience
HUGE...: Bigger than a rain gutter... No - seriously it is small enough to slip through your nostril and go down the back of your throat into your esophagus.
Dr. Jeffrey Ramkaransingh
Interventional Radiology 21 years experience
4 mm diameter: Esophageal manometry catheters are typically about 4 mm in diameter. They are long enough to travel from your nose, down the esophagus and into the stomach.

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Last updated Nov 28, 2017
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