Does the small intestinal manometry measure the gas pressure or liquid pressure?

29 October 2023 1 2K Report

Small intestinal pressure is one of the GI motility indicators and its manometry is very advanced nowadays. I wonder if there is any liquid inside the lumen during manometry. I already know the patient must be fasted for hours before the examination. So, I guess the lumen is filled with air and what is measured is the air pressure instead of liquid pressure. Is there any mistake?

Jean Vestal

There is often liquid in the lumen during an Esophageal manometry that does cause pressure changes, called the Intra-Bolus pressure. The impedance technology can tell us if it's liquid or air. Ultimately, during manometries, it's the muscle pressures that we are evaluating.

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