Figure 2.

Representative trace of a simultaneous 4 channel manometry and video endoscopy. A: The response of the ileocecal valve during cecal distention by air insufflation in a subject with a normal lactulose breath test. Note the increase in pressure within the ileocecal valve greater than in the cecum and ileum during distension of the cecum; B: The response of the ileocecal valve during cecal distention by air insufflation in a subject with positive lactulose breath test. Note the similar pressures within all the manometry ports (a common cavity effect). ICV: Ileocecal valve.