Figure 3 Production of hydrogen (H2) and methane (CH4) in a patient with bacterial overgrowth of the small bowel (SBBO). Fasting H2 and CH4 production at-10 and 0 minutes; 10 grams of lactulose was administered at 0 minutes.

positive when the hydrogen concentration increases by 14-20 ppm (85). Smoking and exercise are not allowed during the test, and the day previous to the test (86). The hydrogen breath test shows stable intra-individual results in healthy people. However, in patients with high values there is a large day-to-day variation (87). The coefficient of variation is 5-10% (84,88). Sensitivity of 93% and specificity of 78% have been described (85). The glucose hydrogen breath test has a sensitivity of 62% and a specificity of 83% compared with jejunal culture (51). Poor sensitivity due to rapid absorption of glucose substrate in the proximal small bowel, which inhibits hydrogen generation, can be explained by a washout effect of concomitant diarrhea, loss of bacterial microbiota because of recent antibiotic therapy, or an acidic bowel lumen.

Pregnancy And Childbirth

Pregnancy And Childbirth

If Pregnancy Is Something That Frightens You, It's Time To Convert Your Fear Into Joy. Ready To Give Birth To A Child? Is The New Status Hitting Your State Of Mind? Are You Still Scared To Undergo All The Pain That Your Best Friend Underwent Just A Few Days Back? Not Convinced With The Answers Given By The Experts?

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