Breath tests and irritable bowel syndrome

Figure 1 Principle of breath testing.

Figure 2 Gases released can be detected by Breath analyzer.

Figure 3 Types of breath tests.

Figure 4 It shows pattern of breath test with bacterial overgrowth in duodenum and jejunum (A), more colonic type of bacteria in small Intestine (B) and more bacteria in duodenum, jejunum and colon showing 2 peaks with lactulose administration (C).

Figure 5 Mechanism of lactose intolerance.

Figure 6 Pattern of lactose (A), fructose (B), sorbitol (C) and D-xylose (D) and tolerance and intolerance using lactose breath test.

Figure 7 Production of methane by methanogenic flora.